International Journal of Refractory Metals & Hard Materials最新文献

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Temperature-driven wear behavior of WC/Co against Si3N4 exposed to air conditions 空气条件下WC/Co对Si3N4的温度驱动磨损行为
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-21 DOI: 10.1016/j.ijrmhm.2025.107342
Yana Xia , Liuyang Bai , Fengxia Dong , Fei Ma , Shuxia Zhang , Haixiong Shi , Yanyan Liu
{"title":"Temperature-driven wear behavior of WC/Co against Si3N4 exposed to air conditions","authors":"Yana Xia ,&nbsp;Liuyang Bai ,&nbsp;Fengxia Dong ,&nbsp;Fei Ma ,&nbsp;Shuxia Zhang ,&nbsp;Haixiong Shi ,&nbsp;Yanyan Liu","doi":"10.1016/j.ijrmhm.2025.107342","DOIUrl":"10.1016/j.ijrmhm.2025.107342","url":null,"abstract":"<div><div>WC/Co coatings are indispensable wear-resistance material to withstand harsh environments in aerospace engines and power generation turbines. This study systematically investigates the reciprocating wear behavior of high-velocity oxygen-fuel (HVOF) sprayed WC/Co coatings against Si₃N₄ counterparts across temperatures ranging from 25 °C to 800 °C in ambient air. The WC/Co-Si<sub>3</sub>N<sub>4</sub> tribo-pair displays relatively constant friction and desirable wear resistance at RT and 400 °C, nevertheless friction rises, and wear deterioration occurs for the WC/Co-Si<sub>3</sub>N<sub>4</sub> tribo-pair as temperature exceeds 500 °C. The friction coefficient rises from 0.38 ± 0.03 at 25 °C to 0.68 ± 0.05 at 600 °C, peaking at 0.83 ± 0.07 at 800 °C, while the specific wear rate of WC/Co escalates exponentially from 2.1 × 10<sup>−7</sup> mm<sup>3</sup>/Nm at 25 °C to 1.4 × 10<sup>−4</sup> mm<sup>3</sup>/Nm at 800 °C, representing a three-order-of-magnitude increase from RT to 800 °C. X-ray diffraction (XRD) and Raman spectroscopy confirm the formation of tribo-oxidized products. At higher temperatures, though the in-situ formation of tribo-chemically oxidized products initially helps to suppress wear to some extent, 600 °C as the critical threshold for stable tribological performance, beyond which contact fatigue and oxidative wear dominates. WC/Co coating demonstrates the temperature stimulated wear worsening phenomenon, which relates to the interfacial tribochemistry during friction. Resulting WO<sub>3</sub> layer on WC/Co coating rubbed against SiO<sub>2</sub> of Si<sub>3</sub>N<sub>4</sub> counterpart substantially undermines the tribological compatibility and thereby poor wear resistance.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107342"},"PeriodicalIF":4.2,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696529","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
Heavy transition metal induced superconductivity in high hardness rock-salt structure tantalum carbide 重过渡金属诱导高硬度岩盐结构碳化钽的超导性
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-20 DOI: 10.1016/j.ijrmhm.2025.107340
Shuailing Ma , Yufei Ge , Wang Chen , Min Lian , Xingbin Zhao , Qiang Tao , Kuo Bao , Pinwen Zhu , Tian Cui
{"title":"Heavy transition metal induced superconductivity in high hardness rock-salt structure tantalum carbide","authors":"Shuailing Ma ,&nbsp;Yufei Ge ,&nbsp;Wang Chen ,&nbsp;Min Lian ,&nbsp;Xingbin Zhao ,&nbsp;Qiang Tao ,&nbsp;Kuo Bao ,&nbsp;Pinwen Zhu ,&nbsp;Tian Cui","doi":"10.1016/j.ijrmhm.2025.107340","DOIUrl":"10.1016/j.ijrmhm.2025.107340","url":null,"abstract":"<div><div>It is widely acknowledged that strong electron-phonon coupling in conventional superconductors predominantly arises from the high vibrational frequencies of light elements. In this work, we report an anomalous superconducting system where the superconducting behavior in the covalent metallic compound TaC originates predominantly from heavy transition metal atoms. Polycrystalline samples of the ‘covalent metal’ TaC (space group Fm-3 m) were synthesized using a high-pressure high-temperature (HPHT) technique. Comprehensive characterization through direct magnetic susceptibility and electrical resistivity measurements confirms that TaC exhibits characteristics of a weakly-coupled type-II superconductor, demonstrating both a remarkably high upper critical magnetic field and a superconducting transition temperature (<em>T</em><sub>c</sub>) of 9.0 K. Intriguingly, the material displays exceptional mechanical properties as evidenced by its asymptotic Vickers hardness values, which significantly surpass these of conventional superconducting materials. The composition with Ta:C = 1:0.9 demonstrates optimal performance balance, achieving a maximum Vickers hardness of 18.7 GPa while maintaining robust superconducting transition characteristics. First-principles calculations reveal that the elevated <em>T</em><sub>c</sub> primarily stems from substantial electronic contributions from tantalum atoms. Our findings demonstrate that controlled introduction of carbon vacancies serves as an effective strategy for tailoring these dual functional characteristics, providing novel design principles for developing specialized superconducting devices capable of operating under extreme mechanical and electromagnetic conditions.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107340"},"PeriodicalIF":4.2,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665046","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-driven densification mechanisms and temperature-adaptive tribological behavior of cBN/CuSnTi composites fabricated via powder extrusion printing 粉末挤压印刷制备cBN/CuSnTi复合材料烧结驱动致密化机制及温度自适应摩擦学行为
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-18 DOI: 10.1016/j.ijrmhm.2025.107336
YuXi Liu , Wei Zhang , Ye Liu , Wei Zhang , Jinbo Wu , Bin Liu
{"title":"Sintering-driven densification mechanisms and temperature-adaptive tribological behavior of cBN/CuSnTi composites fabricated via powder extrusion printing","authors":"YuXi Liu ,&nbsp;Wei Zhang ,&nbsp;Ye Liu ,&nbsp;Wei Zhang ,&nbsp;Jinbo Wu ,&nbsp;Bin Liu","doi":"10.1016/j.ijrmhm.2025.107336","DOIUrl":"10.1016/j.ijrmhm.2025.107336","url":null,"abstract":"<div><div>Cubic boron nitride (cBN)-reinforced metal matrix composites demonstrate exceptional mechanical performance as advanced tool materials. In this study, cBN/CuSnTi composites were fabricated via powder extrusion printing (PEP). The phase evolution, elemental partitioning, and interfacial architecture were systematically investigated. A comprehensive assessment of sintering-driven densification mechanisms, interfacial bonding mechanisms, and tribological behaviors was conducted. Results reveal a temperature-adaptive phase transformation sequence: Cu<sub>13.7</sub>Sn + Cu<sub>10</sub>Sn<sub>3</sub> → Cu<sub>13.7</sub>Sn → Cu<sub>13.7</sub>Sn + Cu<sub>41</sub>Sn<sub>11</sub> and semi-coherent cBN-reinforcement interfaces, achieving optimal flexural strength (719.1 MPa at 900 °C) and compressive strength (772.1 MPa at 1000 °C). The composite exhibits temperature-adaptive tribological performance. For the 800 °C sintered samples, the friction coefficient increased from 0.09 at room temperature to 0.27 at 300 °C. In contrast, the 900 °C sintered samples exhibited a decrease from 0.47 to 0.18 under the same temperature conditions.PEP-derived composites exhibit superior service-temperature programmability, with in situ oxide films improving high-temperature wear resistance.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107336"},"PeriodicalIF":4.2,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686541","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
Enhancing strength-ductility in fine-grain More alloy fibers 提高细晶More合金纤维的强度-延展性
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-17 DOI: 10.1016/j.ijrmhm.2025.107335
Li Huang , Hailong Xu , Tian Chang , Xiaohui Lin , Jing Liang , Tian Xin , Xuanqiao Gao , Jianfeng Li , Jianrong Xue , Wen Zhang
{"title":"Enhancing strength-ductility in fine-grain More alloy fibers","authors":"Li Huang ,&nbsp;Hailong Xu ,&nbsp;Tian Chang ,&nbsp;Xiaohui Lin ,&nbsp;Jing Liang ,&nbsp;Tian Xin ,&nbsp;Xuanqiao Gao ,&nbsp;Jianfeng Li ,&nbsp;Jianrong Xue ,&nbsp;Wen Zhang","doi":"10.1016/j.ijrmhm.2025.107335","DOIUrl":"10.1016/j.ijrmhm.2025.107335","url":null,"abstract":"<div><div>Super-high strength (∼ 2.4 GPa) is obtained in fine-grain Mo<img>Re alloy with ignorable ductility at room temperature, which is attributed to fine grain size and high stress concentration induced by thermal-mechanical processing. The processing-induced stress could not fully release at 800 °C annealing for 1 h. The second σ phases precipitating at 1100 °C annealing without obvious spheroidization in columnar grains, providing a comprehensive match between strength (1.25 GPa) and ductility (20 %) at room temperature. Strength remarkably drops after annealing at 1400 °C and 1500 °C with ductility nearly unchanged. Both strength and ductility decrease obviously after annealing at 1600 °C and 1800 °C. The average grain size in 1800 °C annealed sample is nearly twice as in 1600 °C annealed one. Enhanced strength in as-deformed fibers is dominated by fine grain-strengthening, although a large amount of soft [110] texture occurs. Excellent match between strength and ductility may be attributed to the recovery and [112] texture that happens in 1100 °C annealed fiber. What is more, nano-meters σ particles are detected along grain boundaries in 1100 °C annealed fiber, providing an extra strengthening route. In other annealed fibers, the growth of grain size leads to the decrease in strength.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107335"},"PeriodicalIF":4.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686542","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
Hot wear resistance of Cu/Ti2SnC composite wire Cu/Ti2SnC复合丝的热磨损性能
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-16 DOI: 10.1016/j.ijrmhm.2025.107337
Amirhossein Jahani , Hamed Jamshidi Aval , Mohammad Rajabi , Roohollah Jamaati , Annabel Braem
{"title":"Hot wear resistance of Cu/Ti2SnC composite wire","authors":"Amirhossein Jahani ,&nbsp;Hamed Jamshidi Aval ,&nbsp;Mohammad Rajabi ,&nbsp;Roohollah Jamaati ,&nbsp;Annabel Braem","doi":"10.1016/j.ijrmhm.2025.107337","DOIUrl":"10.1016/j.ijrmhm.2025.107337","url":null,"abstract":"<div><div>This work investigated the hot wear resistance of Cu/Ti<sub>2</sub>SnC composite wire. Scanning electron microscope, optical microscope, and electron back-scattered diffraction (EBSD) were used. The wear test was done at temperatures of 250 °C and 400 °C. By decreasing the reinforcement content, the grain size increased and then decreased but the texture became stronger due to the higher strain. The strong texture influenced the strength and by increasing the reinforcement content, the yield and tensile strength increased and reached 297.8 MPa and 490.3 MPa, respectively, for the wire with 6 vol% Ti<sub>2</sub>SnC which contained strengthening mechanisms of dislocation hardening and load transfer. At the hot wear test, the 6-vol% Ti<sub>2</sub>SnC wire showed better wear resistance than the pure copper wire due to the proper load transfer of Ti<sub>2</sub>SnC particles and the formation of a more mechanical mixture layer (MML). The formed MML caused by the interaction of the wire interface with small debris on the disk interface, provided more protection. The worn SEM images showed that the main wear mechanisms of the extruded wires were adhesion, abrasion, delamination, and oxidation.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107337"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653694","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 multi-component alloy binder on diamond skeleton formation in PCD 多组分合金粘结剂对PCD中金刚石骨架形成的影响
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-16 DOI: 10.1016/j.ijrmhm.2025.107329
Jiangmei Yang , Tianxu Qiu , Li Wang , Guoqin Huang , Yong Liu
{"title":"Influence of multi-component alloy binder on diamond skeleton formation in PCD","authors":"Jiangmei Yang ,&nbsp;Tianxu Qiu ,&nbsp;Li Wang ,&nbsp;Guoqin Huang ,&nbsp;Yong Liu","doi":"10.1016/j.ijrmhm.2025.107329","DOIUrl":"10.1016/j.ijrmhm.2025.107329","url":null,"abstract":"<div><div>HPHT-synthesized polycrystalline diamonds (PCD) exhibit ultrahigh hardness, widely used in cutting and drilling tools. The mechanical strength, primarily dependent on diamond skeleton formation, is significantly influenced by the alloy binder. In this study, PCDs were prepared using 3 multi-component alloy binders: Co<sub>60</sub>Ni<sub>30</sub>Cr<sub>6</sub>C<sub>4</sub>, (Co<sub>60</sub>Ni<sub>30</sub>Cr<sub>6</sub>C<sub>4</sub>)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub>, and (Co<sub>60</sub>Ni<sub>30</sub>Cr<sub>6</sub>C<sub>4</sub>)<sub>90</sub>Ti<sub>2.5</sub>Zr<sub>2.5</sub>Al<sub>5</sub> under HPHT conditions. The results show that (Co<sub>60</sub>Ni<sub>30</sub>Cr<sub>6</sub>C<sub>4</sub>)<sub>90</sub>Ti<sub>2.5</sub>Zr<sub>2.5</sub>Al<sub>5</sub>-PCD achieves the highest transverse rupture strength (approximately 891 MPa), which is 35.6 % and 13.8 % higher than that of Co<sub>60</sub>Ni<sub>30</sub>Cr<sub>6</sub>C<sub>4</sub>-PCD and (Co<sub>60</sub>Ni<sub>30</sub>Cr<sub>6</sub>C<sub>4</sub>)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub>-PCD, respectively. This improvement is attributed to the formation of a well continuous and interconnected diamond skeleton, most probably facilitated by increased generation of fine diamond grains which effectively bridge these particles. Additionally, the carbides formed under HPHT conditions in the (Co<sub>60</sub>Ni<sub>30</sub>Cr<sub>6</sub>C<sub>4</sub>)<sub>90</sub>Ti<sub>2.5</sub>Zr<sub>2.5</sub>Al<sub>5</sub>-PCD can strengthen diamond-binder interfacial bonding. This study provides useful insights for designing new alloy binder to synthesize PCD under HPHT while also deepening the understanding of the formation mechanisms of the diamond skeleton within PCD.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107329"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680627","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
Nanosecond UV laser-induced subsurface damage mechanism and mechanical responses for cemented tungsten carbide 纳秒紫外激光诱导硬质合金亚表面损伤机理及力学响应
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-16 DOI: 10.1016/j.ijrmhm.2025.107334
Yaqin Zhou , Shibo Li , Chongjun Wu , Jiaxuan Wang , Steven Y. Liang
{"title":"Nanosecond UV laser-induced subsurface damage mechanism and mechanical responses for cemented tungsten carbide","authors":"Yaqin Zhou ,&nbsp;Shibo Li ,&nbsp;Chongjun Wu ,&nbsp;Jiaxuan Wang ,&nbsp;Steven Y. Liang","doi":"10.1016/j.ijrmhm.2025.107334","DOIUrl":"10.1016/j.ijrmhm.2025.107334","url":null,"abstract":"<div><div>Subsurface damage induced by laser processing critically influences the mechanical properties and service life of cemented tungsten carbide. To elucidate the mechanisms governing laser-material interactions, this study systematically investigates surface and subsurface damage in WC/12Co through nanosecond UV laser ablation, employing angle polishing, Vickers indentation, and multi-scale characterization techniques. The results demonstrate that the ablative morphology, characterized by re-solidified and deposition area, provides insights into subsurface damage mechanisms comprising micro-pores, broken, cracks and the heat-affected zone (HAZ). Effective laser pulse energy is a key parameter in determining ablation efficiency. In the HAZ, reductions in hardness and fracture toughness exhibit a gradient distribution, localized within the laser pulse energy diffusion range. These findings provide valuable insights for optimizing laser processing parameters to mitigate subsurface damage in cemented tungsten carbide.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107334"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653695","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
Accelerated molten salt electro-deoxidation for ultrafine tantalum powder synthesis via intermediate microstructural modulation 中间微结构调制加速熔盐电脱氧合成超细钽粉
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-16 DOI: 10.1016/j.ijrmhm.2025.107333
Yapeng Kong, Xiwen Chen, Longdi Ma, Yinxiang Han, Yuran Chen, Liqiang Wang, Yangyang Fan, Xuemin Liang
{"title":"Accelerated molten salt electro-deoxidation for ultrafine tantalum powder synthesis via intermediate microstructural modulation","authors":"Yapeng Kong,&nbsp;Xiwen Chen,&nbsp;Longdi Ma,&nbsp;Yinxiang Han,&nbsp;Yuran Chen,&nbsp;Liqiang Wang,&nbsp;Yangyang Fan,&nbsp;Xuemin Liang","doi":"10.1016/j.ijrmhm.2025.107333","DOIUrl":"10.1016/j.ijrmhm.2025.107333","url":null,"abstract":"<div><div>The molten salt electro-deoxidation, i.e. the FFC (Fray-Farthing-Chen) process, demonstrates considerable potential for the synthesis of tantalum powder. However, its practical application is hindered by the long electrolysis duration. This study proposes an accelerated electro-deoxidation process in molten Na<sub>3</sub>AlF<sub>6</sub>-AlF<sub>3</sub> salts for preparing ultrafine Ta powder, which achieves a sequential cathode phase transformation from Ta<sub>2</sub>O<sub>5</sub> through intermediate NaTaO<sub>3</sub> to Ta. NaTaO<sub>3</sub> is formed through in situ interfacial reactions between Ta<sub>2</sub>O<sub>5</sub> and the electrolyte. We demonstrate for the first time that the growth of the FFC-type intermediate is driven by nanoparticle assembly and oriented attachment mechanism. This growth mechanism is influenced by the structure of the electrolyte/particle interface. By constructing a novel hierarchical pore structure Ta<sub>2</sub>O<sub>5</sub> cathode with optimized interfaces, we facilitated a microstructurally controllable transformation of Ta<sub>2</sub>O<sub>5</sub> to fine NaTaO<sub>3</sub>, thereby effectively mitigating the elongation of oxygen ions solid diffusion pathway induced by intermediate coarsening. In the case of self-assembled NaTaO<sub>3</sub>, the weak bonding between the nanoparticles also favors the kinetics of their subsequent decomposition into Ta. This approach has been shown to enable the complete reduction of 1 g of Ta<sub>2</sub>O<sub>5</sub> within only 1 h, demonstrating a significant enhancement in process efficiency. The resulting Ta powder exhibits uniform monodisperse morphology and good capacitive behavior in Na<sub>2</sub>SO<sub>4</sub> electrolyte solution. The present study may now guide the way towards establishing the electrochemical route for the efficient preparation of many other refractory powders materials.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107333"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655509","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 Nb low-alloying on the microstructure, corrosion and wear performance of a Co-28Cr-6Mo alloy fabricated by Vacuum Arc Melting Nb低合金化对真空电弧熔炼Co-28Cr-6Mo合金组织、腐蚀和磨损性能的影响
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-14 DOI: 10.1016/j.ijrmhm.2025.107330
S.N. Emmanouilidou, A.G. Lekatou, A.D. Papagiannopoulos, Z.Z. Siaraka, I.E. Tzala
{"title":"Effect of Nb low-alloying on the microstructure, corrosion and wear performance of a Co-28Cr-6Mo alloy fabricated by Vacuum Arc Melting","authors":"S.N. Emmanouilidou,&nbsp;A.G. Lekatou,&nbsp;A.D. Papagiannopoulos,&nbsp;Z.Z. Siaraka,&nbsp;I.E. Tzala","doi":"10.1016/j.ijrmhm.2025.107330","DOIUrl":"10.1016/j.ijrmhm.2025.107330","url":null,"abstract":"<div><div>This study investigates the effect of small Nb additions on the microstructure, corrosion and sliding wear performance of Co-28Cr-6Mo-xNb (x = 0, 1, 2, 3 wt% Nb) alloys fabricated by Vacuum Arc Melting (VAM). The alloys featured a dendritic structure with a Co-based matrix (a mixture of FCC-Co and HCP-Co) and intergranular eutectic C14-Laves Nb(Cr,Co)<sub>2</sub> co-located with (Nb,Mo,Cr)C carbides, along with minor amounts of Nb<sub>2</sub>O<sub>5</sub>. Increasing the Nb content refined the microstructure and increased the amounts of Nb-based hard phases and HCP-Co. Nb was confined to the interdendritic spaces, whereas Mo preferentially segregated there. All compositions showed very low uniform corrosion rates (order of 10<sup>−4</sup> mA/cm<sup>2</sup>), true passivity and very high resistance to localized corrosion in simulated body fluid at 37 °C during cyclic potentiodynamic polarization, with the 2 wt% Nb-alloy demonstrating the lowest corrosion kinetics. Very low dry sliding wear rates (ball-on-disk test) were measured (order of 10<sup>−7</sup> g/Nm), notably decreasing with increasing Nb content. In view of these findings, VAM proved to be a suitable method for fabricating these alloys.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107330"},"PeriodicalIF":4.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696528","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
Comparison of friction stir processing and heat treatment on arc erosion resistance of cold-sprayed Cu-Ti3SiC2 composite 搅拌摩擦处理与热处理对冷喷涂Cu-Ti3SiC2复合材料抗电弧侵蚀性能的影响
IF 4.2 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-07-14 DOI: 10.1016/j.ijrmhm.2025.107332
Zhibin Yang , Linshan Wang , Hongchao Wang , Xiaomin Zhang , Kai Li , Ke Ma , Wanbin Ren , Jingjun Xu , Meishuan Li
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