International Journal of Refractory Metals & Hard Materials最新文献_第3页

Predicting potential hard materials in NbB ternary boride: First-principles calculations 预测 NbB 三元硼化物中潜在的硬质材料：第一原理计算

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-22 DOI: 10.1016/j.ijrmhm.2024.106927

Qinzhi Huang, Qingrui Lin, Yang Xu, Yong Cao

{"title":"Predicting potential hard materials in NbB ternary boride: First-principles calculations","authors":"Qinzhi Huang, Qingrui Lin, Yang Xu, Yong Cao","doi":"10.1016/j.ijrmhm.2024.106927","DOIUrl":"10.1016/j.ijrmhm.2024.106927","url":null,"abstract":"<div><div>To identify potential superhard materials, we conducted a comprehensive theoretical investigation of the thermodynamic and kinetic stability, mechanical properties, electronic structure, Debye temperatures and melting point of sixteen ternary transition metal borides NbTMB<sub>x</sub> (x = 1, 2, 4 and TM = Ti, V, Fe, Co, Ni, Zr, Ru, Hf, W, Os) using first-principles methods. Our findings indicate that, with the exception of NbFeB, NbRuB, and NbWB, all other borides exhibit both thermodynamic and kinetic stability. Notably, NbTiB<sub>4</sub>, NbVB<sub>4</sub>, NbZrB<sub>4</sub> and NbHfB<sub>4</sub> demonstrate superior hardness and enhanced resistance to deformation, with NbTiB<sub>4</sub> showing an impressive hardness value of 40.84 GPa, positioning it as a promising candidate for superhard materials. Both NbVB<sub>4</sub> and NbTiB<sub>4</sub> have very high Debye temperatures and melting points and can be used in high temperature environments. We further explored the mechanical properties of NbTiB<sub>4</sub> at elevated temperatures by employing a combination of first-principles and quasi-static methods. Our analysis reveals that the elastic constants and moduli of NbTiB<sub>4</sub> decrease with increasing temperature. Additionally, bonding analysis indicates that all Nb<img>B ternary borides exhibit hybridization involving metallic, ionic, and covalent interactions, resulting in the formation of exceptionally strong covalent bonds between boron atoms.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106927"},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532901","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 heat treatment on wear resistance of cold-sprayed Ti-diamond composite coating 热处理对冷喷钛金刚石复合涂层耐磨性的影响

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-19 DOI: 10.1016/j.ijrmhm.2024.106924

Wenquan Li, Hongxia Zhou, Chenghong Wang

{"title":"Effect of heat treatment on wear resistance of cold-sprayed Ti-diamond composite coating","authors":"Wenquan Li, Hongxia Zhou, Chenghong Wang","doi":"10.1016/j.ijrmhm.2024.106924","DOIUrl":"10.1016/j.ijrmhm.2024.106924","url":null,"abstract":"<div><div>In order to enhance the wear resistance of cold-sprayed Ti coatings, Ti-diamond (Ti-MD) composite coatings were fabricated, followed by heat treatment at different temperatures. The effects of heat treatment temperature on the wear resistance of the composite coatings were assessed using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), microhardness testing, and wear resistance experiments. The results show that the composite coating undergo no phase transformation after heat treatment, and exhibits higher microhardness and improved wear resistance. The porosity results showed that the porosity of the coating decreased as the heat treatment temperature increases. TEM results showed that stable TiC (about 10 nm) was formed at the interface between the titanium and diamond particles after heat treatment at 800 °C, and nanoindentation results showed that the heat-treated coating had higher deformation resistance. Specifically, when the heat-treated temperature rose to 800 °C, the composite coating exhibits an 80 % reduction in wear rate, primarily attributable to the decreased porosity of the coating and the enhanced adhesion between Ti and diamond particles. The wear mechanisms of the heat-treated coatings are predominantly reduced oxidative and abrasive wear.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106924"},"PeriodicalIF":4.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554955","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 W content on microstructure and corrosion-wear properties of WNi coatings by laser cladding W 含量对激光熔覆 WNi 涂层微观结构和腐蚀磨损性能的影响

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-19 DOI: 10.1016/j.ijrmhm.2024.106925

Chaoping Jiang, Ruoyi Zhao, Lei Shi, Fengying Zhang

{"title":"Effect of W content on microstructure and corrosion-wear properties of WNi coatings by laser cladding","authors":"Chaoping Jiang, Ruoyi Zhao, Lei Shi, Fengying Zhang","doi":"10.1016/j.ijrmhm.2024.106925","DOIUrl":"10.1016/j.ijrmhm.2024.106925","url":null,"abstract":"<div><div>xW-Ni (x = 60, 70, 80, 90 wt%) coatings were prepared by laser cladding on the surface of X80 steel substrate to explore the effects of different W contents on the microstructure, corrosion resistance, microhardness and corrosion-wear properties of the W<img>Ni coatings. The results revealed that the microstructure of the various W<img>Ni coatings composed of W and γ (Ni, Fe) phases. The increase in W content resulted in more W atoms being dissolved in the γ (Ni, Fe) phase, enhancing the solid solution strengthening effect, which increased the average microhardness of the coating. Moreover, the addition of W provided diffusion channels for metal ions to migrate to the surface of the coating for passivation film formation, which improved the corrosion resistance of the coating. However, the addition of excessive amounts of W caused the coating density to decrease and accelerated galvanic corrosion. The 80 W-Ni coating among the studied coatings exhibited excellent corrosive-wear resistance due to its high hardness and good corrosion resistance. This coating corrosive-wear mechanism was the combination of abrasive wear and corrosion.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106925"},"PeriodicalIF":4.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532902","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

Melting temperature and elastic constants of disordered nonstoichiometric cubic TiCy, ZrCy and HfCy carbides 无序非均匀立方 TiCy、ZrCy 和 HfCy 碳化物的熔化温度和弹性常数

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-18 DOI: 10.1016/j.ijrmhm.2024.106920

Aleksandr I. Gusev

{"title":"Melting temperature and elastic constants of disordered nonstoichiometric cubic TiCy, ZrCy and HfCy carbides","authors":"Aleksandr I. Gusev","doi":"10.1016/j.ijrmhm.2024.106920","DOIUrl":"10.1016/j.ijrmhm.2024.106920","url":null,"abstract":"<div><div>Based on the analysis of phase diagrams of carbide-forming systems M–C (M = Ti, Zr, Hf), an empirical relationship is proposed between the elastic stiffness constants <em>c</em><sub><em>ij</em></sub> of nonstoichiometric cubic carbides of titanium, zirconium and hafnium and their melting temperature. The dependences of the melting temperatures of nonstoichiometric cubic carbides TiC<sub><em>y</em></sub>, ZrC<sub><em>y</em></sub> and HfC<sub><em>y</em></sub> on their composition in homogeneity regions are calculated using the elastic stiffness constants <em>c</em><sub>11</sub>(<em>y</em>) and <em>c</em><sub>44</sub>(<em>y</em>) of these carbides. The calculated maximum melting temperatures are observed for carbides ∼TiC<sub>0.80</sub>, ∼ZrC<sub>0.82</sub> and ∼ HfC<sub>0.94</sub><sub>–</sub><sub>0.95</sub> and are equal to 3345, 3708 and 4192 K, respectively. There is a qualitative correlation between the concentration dependences of the melting temperatures <em>T</em><sub>m</sub>(<em>y</em>) of TiC<sub><em>y</em></sub>, ZrC<sub><em>y</em></sub> and HfC<sub><em>y</em></sub> carbides and the anisotropy of the elastic properties of these carbides.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106920"},"PeriodicalIF":4.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532393","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

Next-generation tungsten carbide cutting bits through cryogenic treatment technique for superior rock cutting performance for mining applications: An experimental study 通过低温处理技术实现新一代碳化钨切削刃，为采矿应用提供卓越的岩石切削性能：实验研究

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-16 DOI: 10.1016/j.ijrmhm.2024.106923

Mogana Priya Chinnasamy , Biswajit Samanta , Rahul Kumar , Rajasekar Rathanasamy

{"title":"Next-generation tungsten carbide cutting bits through cryogenic treatment technique for superior rock cutting performance for mining applications: An experimental study","authors":"Mogana Priya Chinnasamy , Biswajit Samanta , Rahul Kumar , Rajasekar Rathanasamy","doi":"10.1016/j.ijrmhm.2024.106923","DOIUrl":"10.1016/j.ijrmhm.2024.106923","url":null,"abstract":"<div><div>The mining sector seeks innovation to enhance operational efficiency and prolong cutting tool life. This research investigates the impact of cryogenic treatment (CT) for 12, 24, and 36 h on tungsten carbide cutting bits used in mine machineries, focusing on its effects on cutting force, energy consumption, and tool wear during lab-scale linear rock cutting. Microstructural analysis and hardness testing follow CT, revealing improvements in hardness, the formation of new compounds, and the presence of eta carbides. Analysis of linear rock cutting experiments shows that longer holding periods under CT lead to reduced cutting force, energy consumption, and tool wear. Comparing CT 24 to untreated bit at a cutting speed of 200 m/s, CT 24 demonstrates reduction in specific energy by 39.35 %, 41.13 %, and 29.39 % at depth of cut (DoC) of 2 mm, 4 mm, and 6 mm, respectively. Additionally, CT 24 exhibits significantly lower wear rates (79.24 %, 85.44 %, and 85.01 %) compared to UT bits at the same cutting speed. Microstructural analysis identifies multiple wear mechanisms in both treated and untreated worn tools. To optimize the cutting process for mining efficiency, grey relational analysis and Python-based non-dominant sorting are employed. Grey relational analysis identifies 24-h CT, a cutting speed of 200 m/s, and a 2 mm depth of cut as optimal. Non-dominant sorting suggests 24-h CT, a cutting speed of 200 m/s, and 2–4 mm cut depth for optimal results. Pareto solutions indicate specific energy ranging from 14.96 to 9.20 kWh/m<sup>3</sup> and wear rates ranging from 0.33 to 0.39 × 10<sup>−4</sup> cm<sup>3</sup>/cm. Insights from this study offer valuable guidance for the mining industry to enhance cutting tool efficiency and promote environmentally sustainable mining practices.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106923"},"PeriodicalIF":4.2,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527914","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 oscillation frequency on microstructure and properties of WC-Co cemented carbide prepared by hot oscillating pressing 摆动频率对热摆动冲压制备的 WC-Co 硬质合金微观结构和性能的影响

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-13 DOI: 10.1016/j.ijrmhm.2024.106922

Yang Gao , Xiaoting Li , Bo-Yu Li , Sheng-Qiang Deng , De-Jian Sun , Xiao-qin Guo , Lei Fan , Linan An

{"title":"Effect of oscillation frequency on microstructure and properties of WC-Co cemented carbide prepared by hot oscillating pressing","authors":"Yang Gao , Xiaoting Li , Bo-Yu Li , Sheng-Qiang Deng , De-Jian Sun , Xiao-qin Guo , Lei Fan , Linan An","doi":"10.1016/j.ijrmhm.2024.106922","DOIUrl":"10.1016/j.ijrmhm.2024.106922","url":null,"abstract":"<div><div>In this study, a novel hot oscillating pressing (HOP) was used to prepared WC-Co cemented carbides under various oscillation frequencies. The effects of sintering frequencies on the density, microstructure, and mechanical properties of cemented carbides were systematically investigated. The results show that applying a specific oscillation frequency during the sintering process can greatly aid in the densification process, improve the uniformity of microstructure, help the grain refinement, and prevent the formation of abnormally large WC grains. The mechanical properties of the alloys showed a noticeable improvement as the oscillation frequency increased. The hardness and fracture toughness of cemented carbides were not significantly improved when the oscillation frequency was ≥5 Hz, with the optimal values reaching 1913 kg/m<sup>2</sup> and 13.11 MPa.m<sup>1/2</sup>, in turn. The improvement in mechanical properties of cemented carbide can be mainly attributed to higher density, grain refinement, microstructure uniformity and the increase of dislocation/twins caused by plastic deformation.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106922"},"PeriodicalIF":4.2,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442207","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

High-speed Nanoindentation Data Analysis of WC-based Cemented Carbides using Gaussian Mixture Model Clustering and Skew-normal Mixture: Beyond Gaussian Deconvolution 使用高斯混合模型聚类和斜正态混合对基于 WC 的硬质合金进行高速纳米压痕数据分析：超越高斯解卷积

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-13 DOI: 10.1016/j.ijrmhm.2024.106917

L. Ortiz-Membrado , R. Benítez , L. Llanes , E. Jiménez-Piqué

{"title":"High-speed Nanoindentation Data Analysis of WC-based Cemented Carbides using Gaussian Mixture Model Clustering and Skew-normal Mixture: Beyond Gaussian Deconvolution","authors":"L. Ortiz-Membrado , R. Benítez , L. Llanes , E. Jiménez-Piqué","doi":"10.1016/j.ijrmhm.2024.106917","DOIUrl":"10.1016/j.ijrmhm.2024.106917","url":null,"abstract":"<div><div>The mapping of micromechanical properties of heterogeneous materials with high-speed nanoindentation faces challenges in data interpretation and extraction of reliable phase properties. Gaussian deconvolution has commonly been used to treat this data, but problems arise when microstructures are fine compared to the indentation imprint size and the mechanical properties of the different phases are not extremely different. Recently machine-learning methods, such as clustering techniques, have emerged as good approaches to assess these challenges.</div><div>Within this context, it is important to understand the micromechanical properties of cemented carbides, materials usually referred to as hardmetals, but their complex microstructure poses challenges for assessment and interpretation. The study reveals insights from high-speed nanoindentation data treatment on hardmetals with different microstructures and binder compostion. The data has been statistically analyzed by means of a clustering method: Gaussian Mixture Model (GMM) and the fitting of a mixture of skew-normal distributions. Findings underscore the asymmetry in phase properties, and the challenges GMM encounters in some samples. The skew-normal method offers enhanced precision and addresses issues related to scatter in phase intersections, providing a more accurate representation of fine microstructural features. The combined approach of GMM and skew-normal proves consistent for reliable evaluation of micromechanical properties from nanoindentation maps in cemented carbides, and demonstrate the potential of this technique to be applied to novel hardmetal compositions as well as other composites.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106917"},"PeriodicalIF":4.2,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532903","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

Sintering polycrystalline silicon carbide composite ceramics with ultra-high hardness under high pressure 在高压下烧结具有超高硬度的多晶碳化硅复合陶瓷

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-11 DOI: 10.1016/j.ijrmhm.2024.106918

Peihong He, Yulei He, Wenjia Liang, Haidong Long, Ling Ran, Peng Yang, Fang Peng

{"title":"Sintering polycrystalline silicon carbide composite ceramics with ultra-high hardness under high pressure","authors":"Peihong He, Yulei He, Wenjia Liang, Haidong Long, Ling Ran, Peng Yang, Fang Peng","doi":"10.1016/j.ijrmhm.2024.106918","DOIUrl":"10.1016/j.ijrmhm.2024.106918","url":null,"abstract":"<div><div>Silicon carbide (SiC) is an important structural ceramic material, exhibiting exceptional comprehensive properties that are unmatched by metals and other structural materials. In this study, a combination of α-SiC micron powder and β-SiC nanopowder was utilized as precursor materials for high pressure and high temperature (HPHT) sintering. Under a pressure of 5.0 GPa, polycrystalline SiC samples with mixed grain size were sintered within a temperature range from 1000 to 1700 °C, and compared with SiC samples sintered from single micron powder under identical temperature and pressure conditions. The microstructures of the two sets of SiC samples were observed using scanning electron microscopy. Additionally, the stress states and strengthening mechanisms among SiC grains with mixed grain size under HPHT were further analyzed in conjunction with X-ray diffraction results. The polycrystalline SiC composite ceramics sintered at 1700 °C exhibited superior mechanical and thermal properties, achieving a Vickers hardness of 35.2 GPa that is 23.5 % higher than that obtained by conventional spark plasma sintering and even surpassing the hardness of single crystal SiC, demonstrating thermal stability up to 1405 °C in air environment. Transmission electron microscopy was employed to analyze defects and plastic deformation in these samples. The study suggests that the primary strengthening mechanisms of the sintered polycrystalline SiC composite ceramics under HPHT include the increase in micro defects induced by in-situ plastic deformation at elevated temperatures and the effects of high-temperature creep. This study provides new insights into the HPHT sintering of hard materials.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106918"},"PeriodicalIF":4.2,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438470","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

Microstructural characteristics and mechanical properties of laser-welded Ta10W/GH3030 joints with beam offset 带光束偏移的激光焊接 Ta10W/GH3030 接头的微观结构特征和力学性能

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-11 DOI: 10.1016/j.ijrmhm.2024.106919

Jiaxuan Zhao , Jie Ning , Linjie Zhang , Gang Zhao , Shurong Li , Won-Ik Cho

{"title":"Microstructural characteristics and mechanical properties of laser-welded Ta10W/GH3030 joints with beam offset","authors":"Jiaxuan Zhao , Jie Ning , Linjie Zhang , Gang Zhao , Shurong Li , Won-Ik Cho","doi":"10.1016/j.ijrmhm.2024.106919","DOIUrl":"10.1016/j.ijrmhm.2024.106919","url":null,"abstract":"<div><div>Influences of the laser beam offset (LBO) on the microstructures as well as room-temperature and high-temperature mechanical properties of Ta10W/GH3030 dissimilar-material joints were investigated. In laser-welded Ta10W/GH3030 joints prepared under three conditions with LBOs of −0.2 mm (offset toward Ta10W), 0 mm, and + 0.2 mm (offset toward GH3030): the fusion zones (FZ) all contained expulsed substances Ni<sub>3</sub>Ta, NiTa, and Cr<sub>2</sub>Ta and their microhardness was certainly higher than the base metal (BM); a transition layer containing high contents of Ni<sub>3</sub>Ta, NiTa, and Cr<sub>2</sub>Ta phases was observed at the Ta10W/FZ interface. With the increase of the LBO, the contents of Ni<sub>3</sub>Ta, NiTa, and Cr<sub>2</sub>Ta in the FZ gradually declined, the average grain size in the FZ increased slightly, the microhardness of the FZ dropped rapidly, and the thickness of the transition layer at the Ta10W/FZ interface reduced obviously. Either in the room-temperature or high-temperature (750 °C) tensile tests, Ta10W/GH3030 joints were always fractured at the Ta10W/FZ interface, showing the typical brittle fracture mode, and the tensile strength of joints was enhanced with the increasing LBO. Under LBOs of −0.2, 0, and + 0.2 mm, the room-temperature tensile strengths of Ta10W/GH3030 dissimilar-material joints were 266.4, 308.6, and 341.2 MPa, while the high-temperature (750 °C) tensile strengths were 97.6, 191.5, and 202.7 MPa, respectively.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106919"},"PeriodicalIF":4.2,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444956","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

Contact fatigue property of diamond-like carbon films with different structure in cyclic impact conditions 不同结构的类金刚石碳膜在循环冲击条件下的接触疲劳特性

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-10-11 DOI: 10.1016/j.ijrmhm.2024.106921

Mingxiu Chong , Zhongrong Geng , Guangan Zhang , Xia Li , Xueqian Cao

引用次数: 0