Journal of Materials Research and Technology-Jmr&t最新文献_第9页

Origin of the serrated flow and anomalous strength evolution in the severe plastic deformed 2195 Al–Li alloy 2195铝锂合金严重塑性变形中锯齿状流动的起源及异常强度演变

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-13 DOI: 10.1016/j.jmrt.2025.06.092

G.J. Yang , X.Z. Jin , D.B. Shan , B. Guo , M.T. Pérez-Prado , W.C. Xu

{"title":"Origin of the serrated flow and anomalous strength evolution in the severe plastic deformed 2195 Al–Li alloy","authors":"G.J. Yang , X.Z. Jin , D.B. Shan , B. Guo , M.T. Pérez-Prado , W.C. Xu","doi":"10.1016/j.jmrt.2025.06.092","DOIUrl":"10.1016/j.jmrt.2025.06.092","url":null,"abstract":"<div><div>This work investigates room-temperature serrated flow and anomalous strength variations in forged 2195 Al–Li alloys as functions of forging temperature, focusing particularly on dense dynamic strain precipitation of intragranular icosahedral quasicrystalline phases T<sub>2</sub>. To achieve this, 2195 Al–Li alloys were forged at temperatures ranging from 180 to 460 °C, reaching a maximum cumulative strain of 2.4, thereby ensuring comparable microstructure and microtexture while varying dynamic precipitation behaviors. The study reveals that forging between 220 and 380 °C significantly promotes dynamic strain precipitation of intragranular, globular icosahedral quasicrystalline phases T<sub>2</sub> (Al<sub>6</sub>CuLi<sub>3</sub>) due to the high-density, strain-induced crystal defects, which provide enhanced diffusion pathways and sufficient energy to surpass nucleation barriers. The size and average spacing of T<sub>2</sub> particles increase with higher forging temperatures, extending the dislocation arrest duration at these precipitates. Consequently, alloys forged within 300–380 °C exhibit intensified serrated flow and severe strain localization during room-temperature tensile tests, resulting in substantially lower tensile elongation compared to alloys forged above 420 °C. The tensile strength initially decreases and then sharply rises with forging temperatures from 300 to 460 °C, reaching a minimum at approximately 380 °C, coinciding with the precipitation or absence of T<sub>2</sub> phases. This work paves the way for the designation of high-performance 2195 Al–Li alloys by hot deformation.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1007-1018"},"PeriodicalIF":6.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial characteristics and strengthening mechanisms of novel copper-interlayered Ti-6Al-4V wire-reinforced aluminum matrix composites 新型铜-层间Ti-6Al-4V线增强铝基复合材料界面特性及强化机理

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-13 DOI: 10.1016/j.jmrt.2025.06.088

Zixuan Dou , Lisheng Zhong , Chao Deng , Congcong Ren , Kaiyuan Hu , Kai Wang

{"title":"Interfacial characteristics and strengthening mechanisms of novel copper-interlayered Ti-6Al-4V wire-reinforced aluminum matrix composites","authors":"Zixuan Dou , Lisheng Zhong , Chao Deng , Congcong Ren , Kaiyuan Hu , Kai Wang","doi":"10.1016/j.jmrt.2025.06.088","DOIUrl":"10.1016/j.jmrt.2025.06.088","url":null,"abstract":"<div><div>The 5xxx series aluminum alloys are widely used in industry due to their excellent weldability and corrosion resistance. However, their relatively low tensile strength (240–400 MPa), compared to 2xxx (410–510 MPa) and 7xxx series alloys (570–690 MPa), restricts their application in high-stress environments. To address the mechanical property limitations of 5052 aluminum alloy, a novel strategy combining copper electroplating, gradient thermal processing, and hot-dip metal mold casting was developed to fabricate copper-interlayered Ti-6Al-4V wire-reinforced aluminum matrix composites (Cu-TC4/AMC). Quantitative analysis shows that Cu-TC4/AMC treated at 860 °C for 45 min exhibits a 91.9 % and 22.6 % increase in strength compared to the aluminum matrix and conventional composites, respectively. The copper buffer layer significantly alters interfacial evolution by suppressing Al-Ti interdiffusion through a kinetic barrier effect and redistributing stress due to its ductility. The multiscale interfacial design, achieved through controlled electrodeposition and non-isothermal sintering, addresses the longstanding trade-off between reinforcement efficiency and interfacial embrittlement in titanium-aluminum systems. These findings are supported by X-ray diffraction and EBSD analysis. This work demonstrates an innovative strategy for balancing strength and ductility in aluminum matrix composites, offering new insights into interfacial design for high-performance structural materials.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1162-1173"},"PeriodicalIF":6.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Load and temperature dependent sliding wear performance of Binder Jet 3D printed stainless-steel bonded cermet Binder Jet 3D打印不锈钢粘接金属陶瓷的载荷和温度相关滑动磨损性能

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-13 DOI: 10.1016/j.jmrt.2025.06.095

H.S. Maurya , F. Akhtar , K.G. Prashanth

{"title":"Load and temperature dependent sliding wear performance of Binder Jet 3D printed stainless-steel bonded cermet","authors":"H.S. Maurya , F. Akhtar , K.G. Prashanth","doi":"10.1016/j.jmrt.2025.06.095","DOIUrl":"10.1016/j.jmrt.2025.06.095","url":null,"abstract":"<div><div>The present study investigates the dry sliding wear behavior of the TiC-stainless steel-based cermets processed using the Binder Jet 3D Printing technique (BJ3DP). A conventional core-rim microstructure with bimodal TiC grain size was observed in the cermets sintered at 1450 °C, achieving a relative density of 99,5 %. The study explored the effect of loads (5, 10, and 20 N) and temperatures (room temperature, 100, 200, and 300 °C) on the Coefficient of Friction (CoF), wear loss, and wear mechanisms of the sintered cermets. At room temperature, a lower CoF was observed at a 5 N load, corresponding to a lower wear rate for the cermets (3,05 × 10<sup>−6</sup> mm<sup>3</sup>/N-m). Increasing the load at room temperature resulted in a high wear rate of 4,90–5,16 × 10<sup>−6</sup> mm<sup>3</sup>/N-m. Sliding wear tests conducted at 100 °C, 200 °C, or 300 °C resulted in a decreased CoF as compared to room temperature, but a higher wear rate (5,4–8,4 × 10<sup>−6</sup> mm<sup>3</sup>/N-m). At room temperature, the dominant wear mechanisms were fatigue-driven delamination of the compacted debris. However, at elevated temperatures, the predominant wear mechanisms included delamination, adhesive, and oxidative wear. Scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS) and a 3D surface profilometer was used to investigate the wear mechanisms and properties of the worn surface. The tribological results from the current investigation confirm the feasibility of the BJ3DP process to fabricate TiC-stainless steel cermets parts with optimal wear resistance properties at lower temperatures and loads, highlighting the potential of TiC-based cermets with a low-cost steel binder.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1199-1212"},"PeriodicalIF":6.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of granite waste and steel fibers on the mechanical properties of geopolymer concrete before and after fire exposure 花岗岩废料和钢纤维对地聚合物混凝土火灾前后力学性能的影响

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-13 DOI: 10.1016/j.jmrt.2025.06.083

Peem Nuaklong , Phonlayuth Thongpasuk , Kantipok Hamcumpai , Pitcha Jongvivatsakul , Sawekchai Tangaramvong , Thanyawat Pothisiri , Suched Likitlersuang

{"title":"Effect of granite waste and steel fibers on the mechanical properties of geopolymer concrete before and after fire exposure","authors":"Peem Nuaklong , Phonlayuth Thongpasuk , Kantipok Hamcumpai , Pitcha Jongvivatsakul , Sawekchai Tangaramvong , Thanyawat Pothisiri , Suched Likitlersuang","doi":"10.1016/j.jmrt.2025.06.083","DOIUrl":"10.1016/j.jmrt.2025.06.083","url":null,"abstract":"<div><div>This study investigates the post-fire performance and mechanical properties of geopolymer concrete incorporating granite industry waste as a full replacement for natural fine aggregates, reinforced with steel fibers. High-calcium fly ash was used to produce high-strength concrete cured at room temperature. The results indicated that incorporating granite waste and steel fibers reduced workability due to increased internal friction. The lowest slump flow (37 cm), observed in the mix with 2 % steel fibers, represented a 38 % reduction compared to the control mixture. Despite the reduced workability, the concrete achieved a 28-day compressive strength of 55 MPa and a 45 % increase in flexural strength with 2 % steel fibers. Toughness improved by up to 13 times compared to concrete without fibers. Post-fire testing showed that granite-waste concrete retained mechanical performance comparable to that made with natural sand. After 30 min of fire exposure, the residual compressive strength of concrete without fibers dropped to 39 % of its original value, while flexural strength decreased by approximately 70 %. Incorporating 1 % steel fibers increased toughness by 1.7–2.2 times, whereas 2 % fibers enhanced flexural strength retention by up to 10 % after 60 min of exposure. Microstructural analysis confirmed that steel fibers delayed crack propagation and influenced the thermal transformation of gel phases by increasing the silicon-to-aluminum and calcium-to-silicon ratios. These findings highlight the potential of granite waste and steel fibers as sustainable alternatives to natural aggregates and conventional reinforcement for enhancing both fire resistance and mechanical performance in geopolymer concrete.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1106-1118"},"PeriodicalIF":6.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Natural and accelerated weathering evaluation of granite and marble waste paints 花岗岩和大理石废涂料的自然和加速风化评价

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-13 DOI: 10.1016/j.jmrt.2025.06.082

Márcia Maria Salgado Lopes Basso , Leonardo Gonçalves Pedroti , José Maria Franco de Carvalho , José Carlos Lopes Ribeiro , Gustavo Henrique Nalon , Hellen Regina de Carvalho Veloso Moura , Jean Carlos Bernardes Dias , Afonso Rangel Garcez de Azevedo

{"title":"Natural and accelerated weathering evaluation of granite and marble waste paints","authors":"Márcia Maria Salgado Lopes Basso , Leonardo Gonçalves Pedroti , José Maria Franco de Carvalho , José Carlos Lopes Ribeiro , Gustavo Henrique Nalon , Hellen Regina de Carvalho Veloso Moura , Jean Carlos Bernardes Dias , Afonso Rangel Garcez de Azevedo","doi":"10.1016/j.jmrt.2025.06.082","DOIUrl":"10.1016/j.jmrt.2025.06.082","url":null,"abstract":"<div><div>Recent studies have highlighted the potential for using waste generated from the processing of granite and marble as pigments in sustainable and low-cost paints. To evaluate the durability of these paints, this work presents an assessment of the resistance to weathering (natural and accelerated) of different formulations of PVA (polyvinyl acetate) latex paints produced with pigments of granite and/or marble waste, with and without the addition of biocidal and/or dispersant additives. Natural weathering tests were conducted in the Brazilian city of Viçosa, Minas Gerais, where mortar slabs covered with paint samples were exposed to a natural weathering process for one year. Accelerated weathering tests were also performed using a weathering chamber that simulates UV radiation, high temperatures, and condensation mechanisms. The specimens were evaluated based on calculations of the delta-E parameter to determine color changes, pull-out tests, and visual and microscopic analyses of possible pathologies in the paint film. The results indicated that the paints only underwent significant color changes, possibly due to resin degradation after exposure to UV radiation and/or bacterial growth. Furthermore, the accelerated weathering chamber was able to replicate one year of natural weathering results in just 17 days.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1297-1309"},"PeriodicalIF":6.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploration of ductility for refractory high entropy alloys via interpretive machine learning 利用解释性机器学习探索难熔高熵合金的延展性

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-12 DOI: 10.1016/j.jmrt.2025.06.085

Shaolong Zheng , Lingwei Yang , Liyang Fang , Chenran Xu , Guanglong Xu , Yifang Ouyang , Xiaoma Tao

{"title":"Exploration of ductility for refractory high entropy alloys via interpretive machine learning","authors":"Shaolong Zheng , Lingwei Yang , Liyang Fang , Chenran Xu , Guanglong Xu , Yifang Ouyang , Xiaoma Tao","doi":"10.1016/j.jmrt.2025.06.085","DOIUrl":"10.1016/j.jmrt.2025.06.085","url":null,"abstract":"<div><div>Refractory high-entropy alloys (RHEAs) having excellent thermo-mechanical properties always suffer from room temperature brittleness, due to the inherent brittleness of refractory metal elements. RHEAs with compressive ductility ≥30 % hold particular commercial value. While ductility can be engineered through alloying composition and processing condition optimization, this remains challenging due to the virtually infinite and vast unexplored compositional space. Data-driven machine learning (ML) can significantly reduce experimental costs and time by establishing robust correlations between RHEA compositions and ductility. This study constructs an ML model for accurate ductility prediction from sparse compositional data, accelerating the design of ductile RHEAs within infinite compositional space. Two ML algorithms, decision tree (DT) and CatBoost, are trained using physical parameters, with CatBoost demonstrating superior performance in RHEA ductility classification. Integration of the shapley additive explanations (SHAP) model with sample data reveals key relationships between physical parameters and RHEA ductility, providing theoretical insights for developing high-ductility RHEAs. The analysis identifies δχ, <em>T</em><sub><em>m</em></sub>, VEC, and ΔH<sub><em>mix</em></sub> as critical factors in RHEA ductility prediction, with a quasi-linear relationship observed between ΔH<sub><em>mix</em></sub> and ductility. Through the prediction and subsequent preparation of TiZrNbTa<sub>x</sub> (x=0.3, 0.5, 0.7, 1) alloys, the experimental results confirmed the reliability of the proposed model and key parameters. This approach establishes a novel methodology for exploring and developing RHEAs with excellent ductility.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1243-1256"},"PeriodicalIF":6.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Balancing mechanical properties and oxidation resistance of Nb-based refractory alloys: The alloying effect of Hf, W and Ti 铌基耐火合金的平衡力学性能和抗氧化性：Hf、W和Ti的合金化效应

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-12 DOI: 10.1016/j.jmrt.2025.06.081

Xiaolong Li , Huahai Mao , Farid Akhtar , Sheng Guo

{"title":"Balancing mechanical properties and oxidation resistance of Nb-based refractory alloys: The alloying effect of Hf, W and Ti","authors":"Xiaolong Li , Huahai Mao , Farid Akhtar , Sheng Guo","doi":"10.1016/j.jmrt.2025.06.081","DOIUrl":"10.1016/j.jmrt.2025.06.081","url":null,"abstract":"<div><div>Nb-based refractory alloys are among those available materials for ultrahigh-temperature applications, while the trade-off between mechanical properties and oxidation resistance is a long-standing scientific challenge. Two commercial Nb alloys, C103 (Nb<sub>92.5</sub>Hf<sub>5.5</sub>Ti<sub>2</sub>, at.%) and WC3009 (Nb<sub>74.5</sub>Hf<sub>20</sub>W<sub>5.5</sub>, at.%), both with good room-temperature ductility but with various high-temperature strength, were modified here in this work with the intention to simultaneously achieve high strength at high temperatures, reasonable ductility at room temperature, and decent oxidation resistance. Particularly, the contents of alloying elements Hf, W and Ti were varied with reference to C103 and WC3009, considering Hf is good for strength and not detrimental to room-temperature ductility, W is particularly useful for the high-temperature strength, and Ti helps to improve oxidation resistance. The mechanical properties of these modified Nb-based refractory alloys were measured at room temperature and 1200 °C, and their oxidation resistance at 800 °C, 1000 °C and 1200 °C was also evaluated. Among the newly developed Nb-based refractory alloys, Nb<sub>68.5</sub>Hf<sub>15</sub>Ti<sub>10</sub>W<sub>6.5</sub> (10Ti) and Nb<sub>55.5</sub>Hf<sub>20</sub>Ti<sub>15</sub>W<sub>9.5</sub> (15Ti) showed much improved oxidation resistance compared to C103 and WC3009, at a relatively small cost of reduced high-temperature strength compared to WC3009. The alloying effect of Hf, W and Ti on the mechanical properties at both room-temperature and high-temperatures, the oxidation resistance, and more importantly their balance was discussed, providing important insights into the further development of Nb-based refractory alloys targeting ultrahigh-temperature applications.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 997-1006"},"PeriodicalIF":6.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of in-situ SiC particles on the room–temperature dry sliding wear behavior of Al–12Si–4Cu–2Ni–1Mg alloys 原位SiC颗粒对Al-12Si-4Cu-2Ni-1Mg合金室温干滑动磨损行为的影响

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-12 DOI: 10.1016/j.jmrt.2025.06.093

Chongchong Wu , Mengdi Zhang , Jing Zhou , Jingjing Ruan , Xiangfa Liu

{"title":"Effect of in-situ SiC particles on the room–temperature dry sliding wear behavior of Al–12Si–4Cu–2Ni–1Mg alloys","authors":"Chongchong Wu , Mengdi Zhang , Jing Zhou , Jingjing Ruan , Xiangfa Liu","doi":"10.1016/j.jmrt.2025.06.093","DOIUrl":"10.1016/j.jmrt.2025.06.093","url":null,"abstract":"<div><div>In-situ SiC particles (SiC<sub>ip</sub>) show significant potential to elevate the wear behavior of Al matrix composites due to the improved SiC/Al interfacial bonding. This study mainly focuses on the effect of SiC<sub>ip</sub> on the room–temperature dry sliding wear behavior of Al–12Si–4Cu–2Ni–1Mg (Al–Si–Cu) alloys under a widely ranged 40–160 N load. SiC<sub>ip</sub>/Al–Si–Cu composites and Al–Si–Cu matrix alloys were obtained via a melt method, with the powder metallurgy Al–12Si-18SiC<sub>ip</sub> composites as the master alloy. The variation pattern of the wear loss and friction coefficient of the composites and the matrix alloys have been explored, the microstructure of the friction surface and the wear debris have been observed, and the wear enhancing and interfacial improving mechanism of SiC<sub>ip</sub> have been discussed. Results show that the wear of SiC<sub>ip</sub>/Al–Si–Cu composites change from mild-to-moderate wear to severe wear at the load 120–160 N. The severe wear of the composites can be marked by the frequent appearance of large lamellar debris. Due to the improved SiC/Al interfacial bonding, SiC<sub>ip</sub> can undergo plastic flow and accumulate at the friction surface during wear, so simultaneously improve the wear resistance and friction coefficient of Al–12Si–4Cu–2Ni–1Mg alloys, especially at high loads. For in-situ coating SiC<sub>ip</sub>, the tress–buffer effect of in-situ coating plays an important role during wear.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1213-1222"},"PeriodicalIF":6.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance 钼精矿球团氧化焙烧制备高纯氧化钼：球团性能优化

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-12 DOI: 10.1016/j.jmrt.2025.06.084

Yanrui Hou , Ruoyu Yang , Jun Luo , Hu Sun , Guanghui Li , Tao Jiang

{"title":"Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance","authors":"Yanrui Hou , Ruoyu Yang , Jun Luo , Hu Sun , Guanghui Li , Tao Jiang","doi":"10.1016/j.jmrt.2025.06.084","DOIUrl":"10.1016/j.jmrt.2025.06.084","url":null,"abstract":"<div><div>The synchronous oxidation-volatilization process of molybdenum concentrate pellets addresses several key challenges in traditional pyrometallurgy, such as low volatilization rates due to sintering and reduced product purity caused by severe dust pollution during direct ore powder smelting. Efficient pelletization of molybdenum concentrate is essential for advancing its industrial application. However, molybdenite-a typical sulfide mineral-exhibits strong hydrophobicity, which significantly hinders pellet formation and fails to meet industrial standards. To overcome this, the present study introduces kaolin into the pelletization system as a natural binder with excellent hydrophilicity, effectively improving the surface wettability of molybdenite and enabling the development of a high-efficiency composite pelletization technology. The optimized pellets demonstrate excellent physical properties, including a compressive strength of 18.12 N, an abrasion index of 0.34, and a porosity of 25.52 %, along with good structural integrity and gas permeability required for oxidative roasting. Under industrially relevant conditions, the pellets exhibit outstanding roasting performance, achieving a high molybdenum volatilization rate of 91.61 %. Post-roasting, high-purity MoO<sub>3</sub> crystals (99.99 %) are obtained without the need for secondary purification, confirming the process's effectiveness in impurity control and stable production of high-quality products.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1233-1242"},"PeriodicalIF":6.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation-driven optimization of the counter-gravity adjusted-pressure casting process for large thin-wall Ni-based superalloy combustion chamber casings 大型薄壁镍基高温合金燃烧室壳体反重力调压铸造工艺数值模拟优化

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-06-12 DOI: 10.1016/j.jmrt.2025.06.091

Zhengye Zhang , Yunwei Pan , Anping Dong , Zhongfeng Chen , Dashan Sui

{"title":"Numerical simulation-driven optimization of the counter-gravity adjusted-pressure casting process for large thin-wall Ni-based superalloy combustion chamber casings","authors":"Zhengye Zhang , Yunwei Pan , Anping Dong , Zhongfeng Chen , Dashan Sui","doi":"10.1016/j.jmrt.2025.06.091","DOIUrl":"10.1016/j.jmrt.2025.06.091","url":null,"abstract":"<div><div>With the increasing demand for high thrust-to-weight ratio in aerospace engines, the production of Ni-based superalloy castings with large, thin-wall structures has become increasingly critical. This study utilizes ProCast software to optimize the counter-gravity adjusted-pressure casting (APC) process for fabricating a Ni-based superalloy combustion chamber casing with complex thin-wall geometries. According to shrinkage porosity prediction results, the optimized APC process parameters are determined (pouring temperature of 1530 °C, holding pressure of 25 kPa, and initial mold temperature of 1000 °C). Filling simulations conducted under the optimized parameters reveal a stable three-stage filling sequence: (1) the bottom horizontal region filling; (2) thin-wall region filling; (3) difficult-to-fill region filling. Solidification simulations demonstrate delayed cooling at deep recesses of inner and outer rings due to reduced heat transfer rates. Microstructural characterization indicates finer grains and γ′ precipitates in thin-wall regions compared to flange regions, correlating with enhanced yield strength (529 MPa–588 MPa) in thin-wall sections. This study provides valuable insights into the optimization of APC process for large, thin-wall Ni-based superalloy components.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1029-1040"},"PeriodicalIF":6.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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