International Journal of Refractory Metals & Hard Materials最新文献_第4页

Recent advances in toughening of alumina-based ceramic machining tools 铝基陶瓷刀具增韧研究进展

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-09 DOI: 10.1016/j.ijrmhm.2025.107436

Zhihao Yu , Yingqi Zheng , Jialin Sun , Jun Zhao

{"title":"Recent advances in toughening of alumina-based ceramic machining tools","authors":"Zhihao Yu , Yingqi Zheng , Jialin Sun , Jun Zhao","doi":"10.1016/j.ijrmhm.2025.107436","DOIUrl":"10.1016/j.ijrmhm.2025.107436","url":null,"abstract":"<div><div>Alumina-based ceramic cutting tools have garnered significant attention in modern machining due to their excellent hardness, wear resistance, and thermal stability. However, their intrinsic brittleness and poor thermal shock resistance have long restricted their broader applications. This review comprehensively summarizes recent advancements in the toughening of alumina ceramic tools through various strategies, including transformation toughening, whisker reinforcement, graphene enhancement, and nanocomposite technology. Each toughening approach is discussed in terms of its mechanisms, microstructural effects, and resulting mechanical and machining performance. Special emphasis is placed on the transformation toughening of ZrO<sub>2</sub>, whisker bridging and pull-out mechanisms, as well as graphene's multifunctional toughening effects. In addition, recent progress in nanoparticle dispersion and grain boundary engineering for enhanced densification and fracture resistance is highlighted. Finally, future prospects and challenges in the development of high-performance alumina-based ceramic tools for extreme cutting conditions are presented.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107436"},"PeriodicalIF":4.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047158","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

Wetting of MoNbTaW HEA coated graphite/diamond by molten copper at 1100 °C 熔融铜在1100℃下润湿MoNbTaW HEA涂层石墨/金刚石

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-09 DOI: 10.1016/j.ijrmhm.2025.107437

Qiaoli Lin, Yifei Chen

{"title":"Wetting of MoNbTaW HEA coated graphite/diamond by molten copper at 1100 °C","authors":"Qiaoli Lin, Yifei Chen","doi":"10.1016/j.ijrmhm.2025.107437","DOIUrl":"10.1016/j.ijrmhm.2025.107437","url":null,"abstract":"<div><div>This work investigates the wetting of copper (Cu) on surface-modified graphite/diamond substrates for transpiration cooling in extreme environments. Refractory metal films (W, Nb, Ta, Mo) and a WNbTaMo high-entropy alloy (HEA) coating were deposited via magnetron sputtering for the purpose of surface modification. Results show that carbide formation (e.g., WC, Mo<sub>2</sub>C, (WNbTaMo)C) significantly improves Cu wettability (contact angle as low as 10°), with the sequence W > Mo > WNbTaMo > Nb > Ta. The HEA film contributes approximately 20.3 % of the solid/liquid interfacial energy (∼923 mJ/m<sup>2</sup>), attributed to its high interfacial entropy (−0.137 mJ/(m<sup>2</sup>·K)), which significantly exceeds that of conventional metal/metal systems. The Cu/WNbTaMo-graphite composite exhibits self-driven transpiration cooling when oxidized, as the HEA layer decomposes into volatile oxides, releasing liquid Cu. This work provides quantitative insights for designing high-temperature thermal management materials, demonstrating ∼32 % enhanced thermal conductivity (484 W/(m·K) at 1100 °C) through HEA interfacial engineering.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107437"},"PeriodicalIF":4.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047160","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 Na and K on crystallization and their precipitation behavior during APT preparation from AMT solution 在AMT溶液中制备APT时，Na和K对结晶和沉淀行为的影响

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-09 DOI: 10.1016/j.ijrmhm.2025.107438

Liming Zhang, Leiting Shen, Qiusheng Zhou, Tiangui Qi, Zhihong Peng, Guihua Liu, Xiaobin Li

{"title":"Effect of Na and K on crystallization and their precipitation behavior during APT preparation from AMT solution","authors":"Liming Zhang, Leiting Shen, Qiusheng Zhou, Tiangui Qi, Zhihong Peng, Guihua Liu, Xiaobin Li","doi":"10.1016/j.ijrmhm.2025.107438","DOIUrl":"10.1016/j.ijrmhm.2025.107438","url":null,"abstract":"<div><div>Understanding the precipitation behavior of impurities Na and K during crystallization is fundamental to produce high-quality ammonium paratungstate (APT). Based on the proposed near-equilibrium technology of APT preparation via employing ammonium metatungstate (AMT) solution as an intermediate, this study systematically investigated the impact of impurities Na and K on ammoniating crystallization. The results demonstrated that impurities Na and K significantly affected the phase and the morphology of crystalline product, but had a weak influence on crystallization efficiency. Na and K entered the product in the form of (NH<sub>4</sub>)<sub>8</sub>Na<sub>2</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·12H<sub>2</sub>O and (NH<sub>4</sub>)<sub>8</sub>K<sub>2</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·4H<sub>2</sub>O, respectively. Specifically, crystalline products were primarily hexagonal sheet crystals of (NH<sub>4</sub>)<sub>8</sub>Na<sub>2</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·12H<sub>2</sub>O at 40 °C, and cubic crystals of (NH<sub>4</sub>)<sub>10</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·4H<sub>2</sub>O and (NH<sub>4</sub>)<sub>8</sub>K<sub>2</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·4H<sub>2</sub>O at >70 °C. During ammoniating crystallization, element K was more readily precipitated than Na under optimized conditions. The mechanism of ammoniating crystallization with impurities Na and K was concluded as the transformation of metatungstate ion to paratungstate ion and the combination of paratungstate ion with NH<sub>4</sub><sup>+</sup>, K<sup>+</sup> or Na<sup>+</sup> to precipitate low-solubility paratungstates. Compared to evaporation crystallization mainly used in current industry, Na and K were less likely to enter the product during ammoniating crystallization.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107438"},"PeriodicalIF":4.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047166","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

Enhancement of high-temperature strength of cemented carbide by in-grain nanoparticles 颗粒内纳米颗粒增强硬质合金高温强度的研究

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-08 DOI: 10.1016/j.ijrmhm.2025.107430

Xuemei Liu , Yuheng Li , Tongtong Ren , Zhi Zhao , Hao Lu , Haibin Wang , Chao Liu , Xiaokang Cai , Chaoying Fan , Xiao Wen , Xiaoyan Song

{"title":"Enhancement of high-temperature strength of cemented carbide by in-grain nanoparticles","authors":"Xuemei Liu , Yuheng Li , Tongtong Ren , Zhi Zhao , Hao Lu , Haibin Wang , Chao Liu , Xiaokang Cai , Chaoying Fan , Xiao Wen , Xiaoyan Song","doi":"10.1016/j.ijrmhm.2025.107430","DOIUrl":"10.1016/j.ijrmhm.2025.107430","url":null,"abstract":"<div><div>Achieving enhanced high-temperature strength in cemented carbides was challenging via conventional methods. This study presents a significant advancement in achieving superior high-temperature strength and strain in cemented carbides by introducing nanoparticles within WC grains. By utilizing the in-situ synthesized WC-Co composite powder as a raw material, the W-Co-C nanoparticles formed in the WC grains in the resultant cemented carbide. A comprehensive microstructural analysis on representative samples indicated the precipitated nanoparticles exhibited an average diameter of 4.4 nm and possessed coherent interfaces with the WC matrix. Uniaxial compression tests were conducted over the temperature rang from room temperature to 600 °C. It was demonstrated that the cemented carbides showed the highest compression strength and exceptional strain at 600 °C. The enhanced strain was attributed to the deformation accommodation of WC grains, induced by the generation and motion of high-density dislocations within the WC grains. The strength enhancement originated from effective interactions between dislocations and nanoparticles. In particular, the shearing resistance between dislocations and nanoparticles creates a strengthening effect by impeding dislocation motion in the WC matrix. This work provides a new approach for improving the integrated mechanical properties of cemented carbides at high temperatures by enhancing the ceramic phase.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107430"},"PeriodicalIF":4.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047164","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

Electrospark deposition Ni onto wedge-shaped Nb521 plates significantly enhances the performance of Nb521/GH3128 dissimilar material joints 电火花沉积Ni可显著提高Nb521/GH3128异种材料接头的性能

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-08 DOI: 10.1016/j.ijrmhm.2025.107433

Lin-Jie Zhang, Li-Ang Chen, Jie Ning, Suck Joo Na

{"title":"Electrospark deposition Ni onto wedge-shaped Nb521 plates significantly enhances the performance of Nb521/GH3128 dissimilar material joints","authors":"Lin-Jie Zhang, Li-Ang Chen, Jie Ning, Suck Joo Na","doi":"10.1016/j.ijrmhm.2025.107433","DOIUrl":"10.1016/j.ijrmhm.2025.107433","url":null,"abstract":"<div><div>Laser welding technology for Nb521/GH3128 dissimilar materials has significant application value in the aerospace field. In this study, a Ni-based surfacing weld layer (SWL) with different slopes was first deposited on a wedge-shaped Nb521 plate, which was then laser-welded to GH3128, resulting in high-quality Nb521/Ni- SWL/GH3128 dissimilar material joints. Test results indicate that the fusion zone (FZ) of the joints primarily consists of a (Ni)-based solid solution. The Ni-based SWL effectively prevents the formation of brittle Nb<img>Ni phases. For joints with Ni-based SWL slopes of 1:3, 1:6, and 1:9, the average room-temperature tensile strengths were 378 ± 59.73 MPa, 446 ± 30.28 MPa, and 372 ± 38.71 MPa, respectively. All joints fractured at the Ni-based SWL/Nb521 interface, exhibiting brittle fracture characteristics. The Ni-based SWL consists of three layers: Intermetallic compound reaction layer, Nb-rich transition layer, and Ni-deposition layer. Its complex phase distribution and the significant hardness gradient, which induces stress concentration, make this interface the weakest area. In the joint with the Ni-based SWL slope of 1:6, high-temperature testing at 950 °C revealed a tensile strength of 209.6 MPa, with fracture occurring in the fusion zone (FZ). Electrospark deposition of Ni onto wedge-shaped Nb521 plates with an optimal slope of 1:6 significantly enhances the performance of Nb521/GH3128 dissimilar material joints. The room-temperature tensile strength reaches 90 % of the Nb521 base material's strength, and the high-temperature tensile strength at 950 °C reaches 94.8 % of that of the GH3128 base material at the same temperature.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107433"},"PeriodicalIF":4.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047168","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

Vacuum heat treatment induced excellent low-temperature tensile performance of EAM fabricated 96 W alloys 真空热处理使EAM制备的96w合金具有优异的低温拉伸性能

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-08 DOI: 10.1016/j.ijrmhm.2025.107432

Zhenqing Wu , Jiahua Yun , Hao Tang, Chao Wang, Zhuang Zhao, Jialin Yang, Zhihui Xia

{"title":"Vacuum heat treatment induced excellent low-temperature tensile performance of EAM fabricated 96 W alloys","authors":"Zhenqing Wu , Jiahua Yun , Hao Tang, Chao Wang, Zhuang Zhao, Jialin Yang, Zhihui Xia","doi":"10.1016/j.ijrmhm.2025.107432","DOIUrl":"10.1016/j.ijrmhm.2025.107432","url":null,"abstract":"<div><div>To address the low-temperature performance degradation of tungsten heavy alloys fabricated by extrusion-based additive manufacturing (EAM) process with hydrogen sintering, the vacuum heat treatment was utilized to improve the low-temperature tensile properties of 96 W alloy in this study. The DSC, XRD, SEM, TEM, EBSD were adopted to analyze the thermophysical properties, phase composition, microstructure morphology and lattice mismatch of 96 W-2.8Ni-1.2Fe alloys under different sintering and vacuum heat treatment parameters. Based on the optimized sintering parameters induced high-tensile-performance 96 W alloys, this study investigated their low-temperature performance degradation and low-temperature performance strengthening via vacuum heat treatment under different holding time and temperature. Surprisingly, the hydrogen content change after vacuum heat treatment was found to be inconspicuous, and the results showed that vacuum heat treatment benefited γ phase infiltration at W<img>W interfaces, relieved residual stress from thermal expansion difference, altered W/γ interface structure (lattice mismatch and interface layer thickness) and precipitate size, and promoted nano-twin nucleation. Under optimal vacuum heat treatment parameter 1200 °C-60 min, the low-temperature (−30 °C) tensile strength and elongation of 96 W alloy were 1027 ± 15 MPa and 11.9 ± 1.0 %, which is even superior to the 92 W ∼ 93 W alloys with more ductile phases. These findings distinguish this study from similar researches about tungsten heavy alloys, and make it instructive for the application of EAM and powder metallurgy fabricated tungsten heavy alloys under low-temperature environments.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107432"},"PeriodicalIF":4.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047161","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 deep cryogenic treatment on the mechanical properties of ultrafine WC-Co composite 深冷处理对超细WC-Co复合材料力学性能的影响

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-08 DOI: 10.1016/j.ijrmhm.2025.107429

Pan Mao , Jinfeng Peng , Kun Chen , Chunde Zhou , Jiangxiong Gao , Xianxin Zhang , Xiangwu Xiao , Xiaotao Wu , Ruitao Peng

{"title":"Effect of deep cryogenic treatment on the mechanical properties of ultrafine WC-Co composite","authors":"Pan Mao , Jinfeng Peng , Kun Chen , Chunde Zhou , Jiangxiong Gao , Xianxin Zhang , Xiangwu Xiao , Xiaotao Wu , Ruitao Peng","doi":"10.1016/j.ijrmhm.2025.107429","DOIUrl":"10.1016/j.ijrmhm.2025.107429","url":null,"abstract":"<div><div>The effects of deep cryogenic treatment (DCT) soaking time (0, 2, 6, 12, 24 and 48 h) on the microstructural evolution and mechanical properties of an ultrafine WC-Co composite were investigated in detail. The microstructure, phase composition, residual stress, and mechanical properties of cemented tungsten carbide specimens were enhanced after DCT. With the optimal DCT soaking time of 2 h, ultrafine cemented tungsten carbide exhibited the highest hardness and wear resistance. The wear rate of treated specimens was reduced by 24% compared to the untreated specimens. The fracture toughness increased by 17% after 12 h of DCT. A cost-benefit analysis of mechanical enhancements and processing efficiency identified the 2 h as the optimal DCT soaking time. Deep cryogenic treatment caused the refinement of WC grains, precipitation of <em>η</em> phase, martensitic phase transformation, and an increase in residual compressive stress in cemented tungsten carbide. These factors collectively enhanced the hardness, fracture toughness, and wear resistance of cryogenically treated cemented tungsten carbide.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107429"},"PeriodicalIF":4.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047159","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

Study on deoxygenation technology of capacitor grade high voltage tantalum powder 电容器级高压钽粉脱氧技术研究

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-06 DOI: 10.1016/j.ijrmhm.2025.107415

Xingyun Duan , Yi Xu , Fengming Chen , Yingjie Yu , Shuai Zhu , Yaping Lei , Anqi Huang , Fang Zhu , Weiwen Mei , Meibing Feng , Jiancheng Tang

{"title":"Study on deoxygenation technology of capacitor grade high voltage tantalum powder","authors":"Xingyun Duan , Yi Xu , Fengming Chen , Yingjie Yu , Shuai Zhu , Yaping Lei , Anqi Huang , Fang Zhu , Weiwen Mei , Meibing Feng , Jiancheng Tang","doi":"10.1016/j.ijrmhm.2025.107415","DOIUrl":"10.1016/j.ijrmhm.2025.107415","url":null,"abstract":"<div><div>High voltage capacitor grade tantalum powder needs to undergo deoxygenation in the preparation process. There are many factors in deoxygenation process that can affect the effect of deoxygenation. Temperature, time and magnesium dosage are the three main influencing factors. In this paper, the influence of temperature, time and magnesium dosage on the final oxygen content of tantalum powder was studied by orthogonal test and control variable method. The results show that when the temperature is 900–1000 °C and the magnesium dosage ratio in the range of 200 % - 400 %, it has a significant strong effect on the oxygen content of tantalum powder. When the temperature is lower than 900 °C, the oxygen content of tantalum powder decreases significantly with the increase of temperature. When the temperature is higher than 950 °C, the continuous increase of temperature has little effect on the reduction of oxygen content of tantalum powder. Through the research, we get the best deoxygenation process: 950 °C, heat preservation for 3 h, the amount of magnesium is 400 % of the total mass of oxygen in tantalum powder.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107415"},"PeriodicalIF":4.6,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020674","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

Low-temperature Spark Plasma Sintering of fine refractory composite powders core-shell: A case of the powders W@Ni 低温火花等离子烧结精细耐火复合粉末的芯壳：以粉末为例W@Ni

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-06 DOI: 10.1016/j.ijrmhm.2025.107428

A.V. Nokhrin , E.A. Lantcev , L.S. Alekseeva , N.V. Malekhonova , M.S. Boldin , Yu.V. Blagoveshchenskiy , N.V. Isaeva , A.V. Terentyev , K.E. Smetanina , N.V. Sakharov , N.V. Melekhin , V.D. Chupriyanova

{"title":"Low-temperature Spark Plasma Sintering of fine refractory composite powders core-shell: A case of the powders W@Ni","authors":"A.V. Nokhrin , E.A. Lantcev , L.S. Alekseeva , N.V. Malekhonova , M.S. Boldin , Yu.V. Blagoveshchenskiy , N.V. Isaeva , A.V. Terentyev , K.E. Smetanina , N.V. Sakharov , N.V. Melekhin , V.D. Chupriyanova","doi":"10.1016/j.ijrmhm.2025.107428","DOIUrl":"10.1016/j.ijrmhm.2025.107428","url":null,"abstract":"<div><div>The mechanisms of fast low-temperature Spark Plasma Sintering (SPS) of W + 10 % wt. Ni powders were investigated. The powder compositions were obtained in two methods: (i) by mixing W and Ni powders in a specified ratio (hereinafter referred to as W + Ni); (ii) by Ni deposition on the surface of submicron W particles allowing the formation of particles with a core W – shell Ni structure (hereinafter referred to as W@Ni). To reduce the concentrations of oxygen and oxides, the powders were annealed in hydrogen. The solid-phase sintering was performed at various temperatures (1000–1150 °C), pressures (40–80 MPa), heating rates (50–500 °C/min), and isothermal holding times (0–20 min). The sintering temperatures corresponded to the onset of intense dissolution of W in Ni. The samples had high relative density and small grain sizes. The activation energy of SPS of the mixed powders was close to the one of the grain boundary diffusion. The key mechanism for the compaction of W@Ni particles in the SPS process is Coble creep. The increasing of the sintering temperature was shown to lead to an increase in the solubility of W in Ni and, consequently, to an increase in the number of secondary Ni<sub>4</sub>W particles formed during cooling down. The grain growth has a minor effect on the mechanical properties of the W alloy compared to the changes in its phase composition.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107428"},"PeriodicalIF":4.6,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047163","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

Strength-ductility synergy in TZM alloys achieved via particle-stimulated nucleation and precipitate coherency optimization 通过颗粒激发形核和沉淀相干优化实现TZM合金的强度-延性协同作用

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-05 DOI: 10.1016/j.ijrmhm.2025.107427

Haolong Liu , Minghan Sun , Chunlin Xia , Xuan Luo , Chao Zhao , Ruyuan Wang , Zhenwei Chen , Kangyuan Ye , Ning Li

{"title":"Strength-ductility synergy in TZM alloys achieved via particle-stimulated nucleation and precipitate coherency optimization","authors":"Haolong Liu , Minghan Sun , Chunlin Xia , Xuan Luo , Chao Zhao , Ruyuan Wang , Zhenwei Chen , Kangyuan Ye , Ning Li","doi":"10.1016/j.ijrmhm.2025.107427","DOIUrl":"10.1016/j.ijrmhm.2025.107427","url":null,"abstract":"<div><div>Ti-Zr-Mo (TZM) alloys inherently face a trade-off between high strength and adequate ductility, but targeted second-phase particle engineering can overcome this limitation. In this study, we demonstrate that optimizing the size, coherency of second-phase particles and impurity content yields an appreciable combination of strength and ductility in a TZM alloy. Micron-scale Zr-enriched particles act as potent nucleation sites for recrystallization through particle-stimulated nucleation (PSN), refining the grain structure to approximately 1.5 μm. This refined grain structure substantially enhances alloy strength through the Hall-Petch mechanism. Simultaneously, optimized impurity management at grain boundaries alleviates grain boundary embrittlement, thereby improving ductility. Concurrently, a dispersion of nanoscale precipitates with a semi-coherent interface to the matrix provides additional strengthening. Consequently, the alloy achieves a high tensile strength (939 MPa) coupled with promising tensile elongation (27.4 %). This represents an excellent improvement over conventional TZM alloys, underscoring that tailored second-phase particle architectures and impurity control can simultaneously increase strength and ductility. The findings provide a clear microstructural strategy for designing advanced TZM alloys with superior mechanical performance.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"134 ","pages":"Article 107427"},"PeriodicalIF":4.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106773","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