International Journal of Refractory Metals & Hard Materials最新文献_第5页

Effect of heat treatment and different elements on the phase composition and fracture behavior of Nb-Si-Zr based alloy 热处理及不同元素对Nb-Si-Zr基合金相组成及断裂行为的影响

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-29 DOI: 10.1016/j.ijrmhm.2025.107211

Chaowen Zheng, Qi Wang, Ruirun Chen, Wei Wei, Yanqing Su, Hengzhi Fu

{"title":"Effect of heat treatment and different elements on the phase composition and fracture behavior of Nb-Si-Zr based alloy","authors":"Chaowen Zheng, Qi Wang, Ruirun Chen, Wei Wei, Yanqing Su, Hengzhi Fu","doi":"10.1016/j.ijrmhm.2025.107211","DOIUrl":"10.1016/j.ijrmhm.2025.107211","url":null,"abstract":"<div><div>In this paper, the effects of 1300 °C/30 h heat treatment on the microstructure and fracture behavior of Nb-16Si-20Zr-<em>x</em>m (<em>x</em>m=0, 4Cr, 2C, 4Hf, 4Ta, 0.5Sc) alloys were studied. Except for Nb-16Si-20Zr-2C alloy, the transformation from γNb<sub>5</sub>Si<sub>3</sub> phase to αNb<sub>5</sub>Si<sub>3</sub> phase occurs in other Nb-Si-Zr based alloys after heat treatment. There is a small amount of ZrC phase exists in the Nb-16Si-20Zr-2C alloy. After heat treatment, the segregation in the alloys decrease. In addition, the different phases are spheroidized and coarsened but the phases in Nb-16Si-20Zr-0.5Sc alloy are refine during the heat treatment. Except for Nb-16Si-20Zr and Nb-16Si-20Zr-2C, the room temperature fracture toughness of other Nb-Si-Zr based alloys is improved after heat treatment, which is related to the tetragonal crystal structure of αNb<sub>5</sub>Si<sub>3</sub> phase and the spheroidization of the phase. Nb-16Si-20Zr-2C(HT) alloy has the highest fracture toughness mainly because of the precipitation strengthening of ZrC phase. There are many crack deflections and microcracks in the crack path of Nb-16Si-20Zr-2C(HT), and its fracture surface is not flat.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107211"},"PeriodicalIF":4.2,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927563","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

Microstructure and mechanical properties enhancement of WC-10Co cemented carbide with Y2O3 and VC composite additives Y2O3和VC复合添加剂对WC-10Co硬质合金组织和力学性能的增强作用

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-28 DOI: 10.1016/j.ijrmhm.2025.107209

Zhenyun Lu , Yongqiang Qin , Xiaoyong Zhu , Laima Luo , Yucheng Wu

{"title":"Microstructure and mechanical properties enhancement of WC-10Co cemented carbide with Y2O3 and VC composite additives","authors":"Zhenyun Lu , Yongqiang Qin , Xiaoyong Zhu , Laima Luo , Yucheng Wu","doi":"10.1016/j.ijrmhm.2025.107209","DOIUrl":"10.1016/j.ijrmhm.2025.107209","url":null,"abstract":"<div><div>By employing a liquid-liquid doping method to introduce Y<sub>2</sub>O<sub>3</sub> and VC into WC-Co composite powders, WC-10Co cemented carbide with uniform microstructure and excellent performance was successfully prepared through low-pressure sintering. The effects of Y<sub>2</sub>O<sub>3</sub>, VC, and their composite addition on the microstructure and mechanical properties of WC-10Co cemented carbide were investigated. The results indicate that as the content of Y<sub>2</sub>O<sub>3</sub> and VC increases, the WC grain size in WC-10Co cemented carbide reduces significantly. Compared to Y<sub>2</sub>O<sub>3</sub>, the addition of VC has a more pronounced effect in inhibiting grain growth. A suitable amount of VC has a stronger effect on improving the hardness and transverse rupture strength of WC-10Co cemented carbide, while an appropriate amount of Y<sub>2</sub>O<sub>3</sub> is more effective in enhancing its fracture toughness. When Y<sub>2</sub>O<sub>3</sub> and VC are co-doped, not only is WC grain refinement achieved, but the overall uniformity of WC-10Co carbide grains is also improved, thereby enhancing the mechanical properties of WC-10Co cemented carbide. In particular, when a combined additive of 0.25 wt% Y<sub>2</sub>O<sub>3</sub> and 0.25 wt% VC is added, the WC-10Co cemented carbide exhibits the most uniform microstructure and optimal comprehensive mechanical properties. The alloy exhibits an average WC grain size of 0.64 μm, a relative density of 99.96 %, a Vickers hardness of 1783 HV<sub>30</sub>, a fracture toughness of 12.55 MPa·m<sup>1/2</sup>, and a transverse rupture strength of 3600 MPa.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107209"},"PeriodicalIF":4.2,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908181","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

B4C-AISI 434 L steel functionally graded thin wall structures with variable B4C gradient strategies manufactured by TIG PBF-AAM method 采用TIG PBF-AAM方法制备具有可变B4C梯度策略的B4C- aisi 434l钢功能梯度薄壁结构

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-28 DOI: 10.1016/j.ijrmhm.2025.107210

M.D. Aseef Khan, Manoj Masanta

{"title":"B4C-AISI 434 L steel functionally graded thin wall structures with variable B4C gradient strategies manufactured by TIG PBF-AAM method","authors":"M.D. Aseef Khan, Manoj Masanta","doi":"10.1016/j.ijrmhm.2025.107210","DOIUrl":"10.1016/j.ijrmhm.2025.107210","url":null,"abstract":"<div><div>Functionally graded (FG) thin wall structures of B<sub>4</sub>C-AISI 434 L SS composite have been fabricated using three different B<sub>4</sub>C gradient strategies (namely smooth, moderate, and steep) by Tungsten Inert Gas aided Powder Bed Fusion Arc Additive Manufacturing (TIG PBF-AAM) method. For all different strategies, towards the building direction, substantial variations in the grain structure, phase composition, microhardness, and wear- and scratch- resistance were witnessed. The SEM images and the XRD analysis of the FG structures indicate the dilution of B<sub>4</sub>C and formation of iron boride (Fe<sub>2</sub>B, FeB) phases, which is largely influenced by the B<sub>4</sub>C proportion in a specific region. An increased B<sub>4</sub>C content towards the building direction unveiled a higher fraction of unreacted B<sub>4</sub>C phase, which augmented the hardness and wear resistance of the gradient structure expressively. Due to gradual transition in the microstructure, a steady increment in the hardness value was perceived for smooth gradient, and accordingly minimum wear loss (27 μm, 0.00243 g, or 1.45 × 10<sup>−4</sup> mm<sup>3</sup>/N-m) was recorded. While, the moderate and steep gradient structures exhibited sharp transitions of microhardness at the interfaces, and amplified the wear loss consequently. This work demonstrated the potential of TIG PBF-AAM method to fabricate FG parts with tailored microstructure and mechanical properties required for tribological applications, where a hard surface and impact-tolerant base are foremost significant.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107210"},"PeriodicalIF":4.2,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890801","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

Surface structure of lapping discs improves the processing performance and self-sharpening ability of agglomerated diamond abrasives 研磨盘的表面结构提高了团聚金刚石磨料的加工性能和自锐性

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-27 DOI: 10.1016/j.ijrmhm.2025.107208

Junqiang Lin , Qiusheng Yan , Weisong Fang , Peizhen Zhang , Shupei Wang

{"title":"Surface structure of lapping discs improves the processing performance and self-sharpening ability of agglomerated diamond abrasives","authors":"Junqiang Lin , Qiusheng Yan , Weisong Fang , Peizhen Zhang , Shupei Wang","doi":"10.1016/j.ijrmhm.2025.107208","DOIUrl":"10.1016/j.ijrmhm.2025.107208","url":null,"abstract":"<div><div>Agglomerated diamond (AD) abrasives have been proven applicable in the machinability of polyurethane lapping discs. However, the processing performance, material removal behaviour, and self-sharpening mechanisms of AD abrasives on lapping discs with different surface structures remain unclear. Therefore, in this study, we designed different groove-structured lapping discs and combined them with AD abrasives to conduct lapping experiments on sapphire wafers to investigate the processing performance of groove-structured lapping discs on AD abrasives and reveal the material removal behaviour and dynamic self-sharpening mechanism of AD abrasives. The results show that the groove-structured lapping disc exerts a guiding and restraining effect on the AD abrasives, improving processing uniformity and reducing their wear rate. Additionally, the groove structure enhances the vortex effect of the lapping slurry, which further improves the self-sharpening ability and processing performance of the AD abrasives. The polyurethane disc with a cylindrical groove-2# structure and a size ratio 1:100 produced the best processing results. At a processing cycle of 30 min, the average particle size of AD abrasive was 26.2 μm, which minimized micro-fracture and resulted in a processing effect with an material removal rate (MRR) of 2.51 μm/min and surface roughness (Ra) of 10.42 nm. The AD abrasives remove the surface material of the workpiece through a combination of two-body sliding friction and three-body rolling friction within the groove-structured disc, achieving superior processing efficiency and quality.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107208"},"PeriodicalIF":4.2,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899091","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

Improved high temperature stability and enhanced high-speed dry cutting performance of AlCrBN coatings by alloying with B 通过与B合金化，提高了AlCrBN涂层的高温稳定性和高速干切削性能

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-27 DOI: 10.1016/j.ijrmhm.2025.107206

Langlang Tao , Jianming Wang , Wei Fang , Fei Cai , Dongliang Xu , Shihong Zhang

{"title":"Improved high temperature stability and enhanced high-speed dry cutting performance of AlCrBN coatings by alloying with B","authors":"Langlang Tao , Jianming Wang , Wei Fang , Fei Cai , Dongliang Xu , Shihong Zhang","doi":"10.1016/j.ijrmhm.2025.107206","DOIUrl":"10.1016/j.ijrmhm.2025.107206","url":null,"abstract":"<div><div>Boron (B)-containing AlCrBN coatings are promising protective coatings for high-speed dry cutting application. In this work, AlCrBN coatings with various B contents (0 at.%, 2.9 at.%, and 4.8 at.% namely B0, B1, and B2) were synthesized, and their high-temperature and high-speed dry cutting performance were evaluated by the high-temperature vacuum annealing and high-speed dry cutting experiment. Comparing with B0 coating (AlCrN coating without B), B1 and B2 coatings delayed/suppressed the phase decomposition from <em>fcc</em>-(AlCr)N into <em>h</em>-AlN and Cr<sub>2</sub>N, and also suppressed the diffusion of Co from the substrate into the coating surface at an annealing temperature of 1000 °C. This also contributed to the high annealed hardness of 3400 HK<sub>0.05</sub> at 1000 °C for B1 and B2 coatings. High-speed dry turning result showed that B1 coated insert exhibited a longer cutting time (13 min), required less cutting force, and had a lower coefficient of friction during the whole cutting process. The wear mechanisms are abrasive, adhesive, and oxidative on both rake faces and flank faces for all coated inserts, however, addition of B reduced its wear of a B1-coated insert. TEM results from the worn rake face of a B1-coated insert revealed that an oxide tribo-film composed of <em>w</em>-AlN and Al<sub>2</sub>O<sub>3</sub> emerged upon the unaffected AlCrBN coating, further confirming the structural stability of the AlCrBN coating under high-speed dry cutting.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107206"},"PeriodicalIF":4.2,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888179","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

Densification, microstructure and properties of 91 W-6.3Ni-2.7Fe fabricated by selective laser melting 选择性激光熔化制备91 W-6.3Ni-2.7Fe合金的致密化、显微组织和性能

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-26 DOI: 10.1016/j.ijrmhm.2025.107207

Wenjie Huo, Xinhe Zhu, Zhiwei Jiao, Aolong Sun, Yongqi Gao, Mulan Mu

{"title":"Densification, microstructure and properties of 91 W-6.3Ni-2.7Fe fabricated by selective laser melting","authors":"Wenjie Huo, Xinhe Zhu, Zhiwei Jiao, Aolong Sun, Yongqi Gao, Mulan Mu","doi":"10.1016/j.ijrmhm.2025.107207","DOIUrl":"10.1016/j.ijrmhm.2025.107207","url":null,"abstract":"<div><div>Tungsten is a refractory metal with high density and is widely used in aerospace, medical, and nuclear applications due to its robust performance characteristics. In this study, 91 W-6.3Ni-2.7Fe alloys were fabricated via Selective Laser Melting (SLM). This study delves into the impacts of scanning speed on the densification, microstructure, and mechanical properties of the 91 W-6.3Ni-2.7Fe alloy under the conditions of a laser power of 200 W, scanning pitch of 0.08 mm, and powder layer thickness of 0.03 mm. The investigation demonstrates that an optimal scanning speed of 175 mm/s yields a relative density of 96.89 %, a performance attributed to a balanced energy input that facilitates efficient powder melting and consolidation. This optimized condition further promotes the formation of a microstructure dominated by a high-W phase intertwined with a W-Ni-Fe intermetallic phase, which underpins the alloy's microhardness of 610 HV and tensile strength of approximately 800 MPa. In contrast, higher scanning speeds (≥600 mm/s) introduce reduced energy per unit length, leading to the development of dendritic structures that deteriorate the material’s performance.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107207"},"PeriodicalIF":4.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894526","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 of superconducting properties of orthorhombic hard monoborides MB (M = Ta, Nb, W): First-principles calculations 正交硬单硼化物MB （M = Ta, Nb， W）超导性能研究：第一性原理计算

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-25 DOI: 10.1016/j.ijrmhm.2025.107190

H.Y. Uzunok, Hosea Sichula, H.M. Tütüncü, S. Bağcı

{"title":"Study of superconducting properties of orthorhombic hard monoborides MB (M = Ta, Nb, W): First-principles calculations","authors":"H.Y. Uzunok, Hosea Sichula, H.M. Tütüncü, S. Bağcı","doi":"10.1016/j.ijrmhm.2025.107190","DOIUrl":"10.1016/j.ijrmhm.2025.107190","url":null,"abstract":"<div><div>In this work, we have realized a comprehensive assessment of the physical properties of MB (M = Ta, Nb, W) monoborides by conducting <em>ab initio</em> pseudopotential calculations based on the density functional theory with its generalized gradient approximation. According to their electronic density of states, the d-orbitals of transition metal atoms contribute most to the electronic bands of the studied monoborides near the Fermi energy level, which makes them metallic. Detailed analysis of their elastic and mechanical properties reveals that all the studied monoborides have good hardness, which makes them promising candidates for the protection of cutting and forming tools. Analysis shows that WB has an electron-phonon coupling parameter of 0.551, which is significantly more extensive than TaB and NbB (0.228 and 0.220). Its relatively large electron-phonon coupling parameter makes WB superconducting at 2.794 K, being in excellent agreement with its measured value of 2.8 K. Between the studied monoborides, only WB is a hard superconductor with a ductile character and is promising the compound for exploring exotic phenomena due to the interplay of hardness and superconductivity.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107190"},"PeriodicalIF":4.2,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883268","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 metal combined with non-metallic additives on the microstructure and properties of B4C ceramics via pressureless sintering 金属与非金属添加剂复合对无压烧结B4C陶瓷显微组织和性能的影响

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-23 DOI: 10.1016/j.ijrmhm.2025.107205

Jiaxing Li , Xiuyi Chen , Lu Tang , Xinyan Yue , Hongqiang Ru

{"title":"Effect of metal combined with non-metallic additives on the microstructure and properties of B4C ceramics via pressureless sintering","authors":"Jiaxing Li , Xiuyi Chen , Lu Tang , Xinyan Yue , Hongqiang Ru","doi":"10.1016/j.ijrmhm.2025.107205","DOIUrl":"10.1016/j.ijrmhm.2025.107205","url":null,"abstract":"<div><div>This paper studies the effect of Ti combined with different non-metallic sintering additives (Y<sub>2</sub>O<sub>3</sub>, ZrO<sub>2</sub>, TiO<sub>2</sub>, SiC) on the microstructure and mechanical properties of pressureless sintered B<sub>4</sub>C. B<sub>4</sub>C ceramics were successfully prepared by pressureless sintering at 2000 °C. The phase composition, microstructure and mechanical properties of the samples were analyzed. The results indicate that different non-metallic sintering additives exert distinct influences on the mechanical properties of B<sub>4</sub>C ceramics, and their toughening mechanisms are also different. Additionally, TiB<sub>2</sub> and ZrB<sub>2</sub> formed in situ during the sintering process form the (Zr, Ti)B<sub>2</sub> solid solution, which significantly enhancing the fracture toughness and hardness of B<sub>4</sub>C ceramics. In this study, the sample with 2.5 wt% Ti, 3 wt% carbon black and 10 wt% SiC showed the best properties. The relative density, Vickers hardness, fracture toughness and flexural strength were 94.4 %, 28.9 GPa, 3.58 MPa·m<sup>1/2</sup> and 221 MPa, respectively.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107205"},"PeriodicalIF":4.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882869","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, microstructure and mechanical properties of a Ce-PSZ reinforced molybdenum alloy Ce-PSZ增强钼合金的制备、显微组织及力学性能

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-20 DOI: 10.1016/j.ijrmhm.2025.107204

Fengshun Du , Bohua Duan , Dezhi Wang , Zhuangzhi Wu , Xinli Liu

{"title":"Preparation, microstructure and mechanical properties of a Ce-PSZ reinforced molybdenum alloy","authors":"Fengshun Du , Bohua Duan , Dezhi Wang , Zhuangzhi Wu , Xinli Liu","doi":"10.1016/j.ijrmhm.2025.107204","DOIUrl":"10.1016/j.ijrmhm.2025.107204","url":null,"abstract":"<div><div>Improving the poor plasticity and fracture toughness of molybdenum alloys is the key to expanding their industrial applications. In this experiment, a cerium partially stabilized zirconia (Ce-PSZ) reinforced molybdenum alloy with outstanding properties was obtained by combining the hydrothermal method and the powder metallurgy technology. This study investigated how varying Ce-PSZ content influences the microstructure and mechanical properties of Mo/Ce-PSZ alloys. The results show that with increasing Ce-PSZ addition, the relative density and hardness of the alloys gradually increase, while the tensile strength, plasticity, and fracture toughness exhibit a tendency to initially increase and subsequently decrease. When 1.5 wt% of Ce-PSZ is added, the Mo alloys achieve excellent overall mechanical properties, with an ultimate tensile strength of 528.5 MPa, elongation of 29.3 %, and fracture toughness of 38.5 MPa∙m<sup>1/2</sup>. These values are about 22.7 %, 22.5 %, and 83.3 % higher than those of pure molybdenum. The substantial enhancement in elongation and fracture toughness can be predominantly ascribed to the refinement of grains and the stress-induced Ce-PSZ phase transformation. This research provides a novel method for the preparation of molybdenum alloys with high fracture toughness and elongation.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107204"},"PeriodicalIF":4.2,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863671","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

Influence of feedpowder morphology on microstructure and mechanical properties of Tantalum produced by cold spray additive manufacturing 给粉形貌对冷喷涂增材制造钽显微组织和力学性能的影响

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-04-20 DOI: 10.1016/j.ijrmhm.2025.107203

Lang Cui , Guohui Xu , Kai Liu , Jianjie Hao , Jian Zhao , Jing Cui , Guang Liu , Enkang Hao , Jie Zou

{"title":"Influence of feedpowder morphology on microstructure and mechanical properties of Tantalum produced by cold spray additive manufacturing","authors":"Lang Cui , Guohui Xu , Kai Liu , Jianjie Hao , Jian Zhao , Jing Cui , Guang Liu , Enkang Hao , Jie Zou","doi":"10.1016/j.ijrmhm.2025.107203","DOIUrl":"10.1016/j.ijrmhm.2025.107203","url":null,"abstract":"<div><div>In this study, two types of tantalum powders were deposited using cold spray additive manufacturing (CSAM). We focused on comparing the effects of hydride-dehydride polygonal tantalum powder (A-Ta) and plasma-atomized spherical tantalum powder (S<img>Ta) on the microstructure, mechanical properties, and tribological performance of the resulting deposits. Results revealed that under identical spraying conditions, A-Ta powder achieved a higher deposition efficiency (DE) of 86 %, compared to 61 % for S<img>Ta powder. Both deposits demonstrated low porosity; however, the A-Ta deposit exhibited significantly superior mechanical properties, with a tensile strength of 350 MPa, approximately 2.1 times higher than the S<img>Ta deposit. Moreover, the A-Ta deposit showed enhanced wear resistance. At a heat flux density of 2.4 MW/m<sup>2</sup>, the A-Ta deposit demonstrated excellent ablation resistance, exhibiting a linear ablation rate of only −0.0012 μm/s after a 10-s exposure. These findings highlight the considerable potential of low-cost polygonal A-Ta powder for high-temperature ablation protection applications, establishing it as a promising candidate for CSAM of tantalum layers.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"131 ","pages":"Article 107203"},"PeriodicalIF":4.2,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863670","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