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

Shape, microstructure and properties of diamond/copper composites prepared by binder jet additive manufacturing

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-08 DOI: 10.1016/j.ijrmhm.2025.107148

Meng-meng Ding , Hao Fu , Yun-fei Tian , Jian Sun , Xue Yang , Lai-ma Luo

{"title":"Shape, microstructure and properties of diamond/copper composites prepared by binder jet additive manufacturing","authors":"Meng-meng Ding , Hao Fu , Yun-fei Tian , Jian Sun , Xue Yang , Lai-ma Luo","doi":"10.1016/j.ijrmhm.2025.107148","DOIUrl":"10.1016/j.ijrmhm.2025.107148","url":null,"abstract":"<div><div>In this work, in order to achieve the net near forming of diamond/copper composites, the binder jet 3D printing (BJ3DP) was employed to prepare and the printing parameters and sintering temperature were optimized. Subsequently, in order to further improve the relative density and thermal conductivity of the printed parts, tungsten metallization of diamond was carried out and its effects on the interfacial bonding between diamond and copper were discussed. The experimental results showed that the green parts with best quality was obtained when the print layer thickness and binder saturation were 100 μm and 50 %, respectively. After sintering at 1250 °C, the diamond/copper composites prepared by BJ3DP achieved the highest relative density of 92.16 % along with the most excellent heat dissipation performance, in detail, a thermal conductivity of 229 W·m<sup>−1</sup>·K<sup>−1</sup>. After tungsten plating on the diamond surface, the relative density and thermal conductivity of the samples were improved and reached to 94.95 % and 343 W·m<sup>−1</sup>·K<sup>−1</sup>, respectively. This may be attributed to that the interfacial bonding between diamond and copper was enhanced by formation of WC and W<sub>2</sub>C phase during sintering. This work provides a process basis and data reference for the preparation of diamond/copper composites by BJ3DP.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107148"},"PeriodicalIF":4.2,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592806","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 different shaped three-dimensional preforms on the microstructure and wear resistance of WC/Iron-based configuration composites

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-08 DOI: 10.1016/j.ijrmhm.2025.107132

Di Wu , Haojie Gou , Yifan Shi , Lin Yang , Fei Zhang , Zulai Li , He Wei , Quan Shan

{"title":"Influence of different shaped three-dimensional preforms on the microstructure and wear resistance of WC/Iron-based configuration composites","authors":"Di Wu , Haojie Gou , Yifan Shi , Lin Yang , Fei Zhang , Zulai Li , He Wei , Quan Shan","doi":"10.1016/j.ijrmhm.2025.107132","DOIUrl":"10.1016/j.ijrmhm.2025.107132","url":null,"abstract":"<div><div>The mechanical properties of metal matrix composites are frequently reduced due to the uneven distribution of reinforcement particles. In this article, the effects of three-dimensional preforms with different shapes on the microstructure of WC/ Iron-based configuration composites were examined, and the hardness, friction coefficient and wear properties of WC/ Iron-based configuration composites in different regions were measured. The findings reveal that the microstructure of the composites is mainly composed of WC, W<sub>2</sub>C, Fe<sub>6</sub>W<sub>6</sub>C, and M<sub>7</sub>C<sub>3</sub> carbides. Compared with the triangular and quadrilateral configurations, the composite materials prepared by hexagonal configuration have better hardness and wear resistance, the matrix hardness is 921.7HV, the composite layer hardness is 1450.4 HV, the friction coefficient is the lowest (0.51), and the wear weight is the least (0.21 g). The temperature-time curves obtained by finite element simulation also confirm that the designed three-dimensional preform has a favorable metallurgical reaction with the matrix, especially the hexagonal configuration.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107132"},"PeriodicalIF":4.2,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601365","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

A review on the progress in cobalt removal for PDC

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-06 DOI: 10.1016/j.ijrmhm.2025.107136

Songcheng Tan , Ying Yang , Xiaohong Fang , Xiaojun Zhao , Longchen Duan , Yule Hu

{"title":"A review on the progress in cobalt removal for PDC","authors":"Songcheng Tan , Ying Yang , Xiaohong Fang , Xiaojun Zhao , Longchen Duan , Yule Hu","doi":"10.1016/j.ijrmhm.2025.107136","DOIUrl":"10.1016/j.ijrmhm.2025.107136","url":null,"abstract":"<div><div>As an excellent super-hard composite cutting tool material, polycrystalline diamond composite (PDC) is widely utilized in various fields such as coal geology, oil drilling and gas extraction. However, one of the main reason for its subsequent failure is the use of cobalt, which is the most commonly used metal binder during its sintering process. In recent years, researchers have conducted studies on the methods and effects of cobalt removal after sintering. This review summarizes the studies on the role and influence of cobalt in the PDC's fabrication process as well as the researches on the progress of cobalt removal from the upper layer of PDC through acid leaching or electrolysis methods. Moreover, the effects after cobalt removal on wear resistance, thermal stability and impact toughness have been discussed. The review provides a comprehensive overview of experimental results and insights derived from studies on cobalt removal of PDC over the past dozen years. The focus is on the technologies, solution formulas of cobalt removal, and the relationship between the depth and performance of PDC after cobalt removal. It is crucial to optimize these parameters for achieving efficient and precise cobalt removal, thereby optimizing the performance of PDC.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107136"},"PeriodicalIF":4.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578034","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, fracture behavior and mechanical properties of cellular Ti(C,N)-based cermets with varying Ni contents fabricated by multiphase-flow agglomeration and subsequent vacuum sintering

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-06 DOI: 10.1016/j.ijrmhm.2025.107133

Zhiyi Jiang , Yong Zheng , Xiangyu Xu , Wei Zhou , Bo Li , Min Yang , Yijie Zhao

{"title":"Microstructure, fracture behavior and mechanical properties of cellular Ti(C,N)-based cermets with varying Ni contents fabricated by multiphase-flow agglomeration and subsequent vacuum sintering","authors":"Zhiyi Jiang , Yong Zheng , Xiangyu Xu , Wei Zhou , Bo Li , Min Yang , Yijie Zhao","doi":"10.1016/j.ijrmhm.2025.107133","DOIUrl":"10.1016/j.ijrmhm.2025.107133","url":null,"abstract":"<div><div>Cellular Ti(C,N)-based cermets were fabricated using multiphase-flow agglomeration followed by liquid phase sintering. The influence of the Ni binder phase content on the microstructure, mechanical properties and fracture behavior of cermets was investigated. A distinct interface between the matrix and the agglomerates was observed. As the Ni content increased, the volume percentage of the agglomerates dropped and some agglomerates began to dissolve, compromising the integrity of the structure. The TRS of cellular cermets initially elevated before decreasing. Hardness consistently declined, and toughness exhibited the opposite trend. Moreover, the relationship between the volume percentage of agglomerates and the mechanical properties of cellular cermets was modeled mathematically. From cermets A to E, there was a noticeable increase in the proportion of tearing ridges and dimples in both the matrix and agglomerates. Cracks passing through the interface were more likely to bridge or deflect, significantly consuming fracture energy. Furthermore, a larger fractal dimension indicated that the fracture behavior of cellular cermets was highly complex and irregular, contributing to superior fracture toughness. In summary, cellular cermet D containing 22 wt% Ni binder phase exhibited the highest TRS value and better hardness and fracture toughness.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107133"},"PeriodicalIF":4.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578032","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

Dual-grained size effect induced simultaneous enhancement of hardness-strength-toughness in TaC-modified Ti(C, N)-based cermets

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-06 DOI: 10.1016/j.ijrmhm.2025.107135

Sheng-Jian Zhou , Jia-Hu Ouyang , Wen-Tao Su , Jing-Xin Tian , Xiang-Rui Kong , Chen-Guang Xu , Ying Li , Yu-Jin Wang , Lei Chen , Yu Zhou

{"title":"Dual-grained size effect induced simultaneous enhancement of hardness-strength-toughness in TaC-modified Ti(C, N)-based cermets","authors":"Sheng-Jian Zhou , Jia-Hu Ouyang , Wen-Tao Su , Jing-Xin Tian , Xiang-Rui Kong , Chen-Guang Xu , Ying Li , Yu-Jin Wang , Lei Chen , Yu Zhou","doi":"10.1016/j.ijrmhm.2025.107135","DOIUrl":"10.1016/j.ijrmhm.2025.107135","url":null,"abstract":"<div><div>A trade-off is required to balance the hardness, strength and toughness of Ti(C, N)-based cermets, which remains a significant challenge due to the inherent contradiction between hardness (or strength) and toughness. In this work, a simple powder metallurgy process was used to prepare Ti(C, N)-based cermets with a dual-grained structure by refractory TaC modification and raw powder grading strategy. The microstructure formation process and synergistic enhancement mechanism of hardness, strength and toughness in the dual-grained Ti(C, N)-based cermets were elucidated. The formation of a dual-grained structure is attributed to selective dissolution and reprecipitation resulting from the difference in chemical potentials of both various carbonitrides and different-sized particles. As compared with conventional Ti(C, N)-based cermets prepared by only using submicron-sized raw powders, the dual-grained Ti(C, N)-based cermets modified by TaC achieve a distinct increase in Vickers hardness of about 14 %, in flexural strength of about 25 %, and in fracture toughness of 6 %. The hardness-toughness trade-off is significantly superior to those of conventional submicron-sized Ti(C, N)-based cermets using the same sintering method and even commercial Ti(C, N)-based cermets. This work offers a simple, novel and low-cost method to develop metal-ceramic composites with simultaneous enhancement of hardness, strength and toughness.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107135"},"PeriodicalIF":4.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592805","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

Refractory multi-principal element alloys MoxNbTiZry: Microstructure, mechanical properties and oxidation resistance

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-05 DOI: 10.1016/j.ijrmhm.2025.107138

Ye Tang , Zhixiong Xie , Tao Yang , Youhang Peng , Yushuai Liu

{"title":"Refractory multi-principal element alloys MoxNbTiZry: Microstructure, mechanical properties and oxidation resistance","authors":"Ye Tang , Zhixiong Xie , Tao Yang , Youhang Peng , Yushuai Liu","doi":"10.1016/j.ijrmhm.2025.107138","DOIUrl":"10.1016/j.ijrmhm.2025.107138","url":null,"abstract":"<div><div>Microstructures and properties of the Mo<sub><em>x</em></sub>NbTiZr<sub><em>y</em></sub> refractory multi-principal element alloys (RMPEAs) are investigated. The results show that the single-phase solid solution forms in the heat-treated Mo<sub><em>x</em></sub>NbTiZr<sub><em>y</em></sub> alloys with <em>x</em>/<em>y</em> ≤ 0.6, while the thermally stable Zr-rich phase is separate from the (Mo, Nb)-rich phase with <em>x</em>/<em>y</em> ≥ 1. The room temperature strength of the Mo<sub><em>x</em></sub>NbTiZr<sub><em>y</em></sub> alloys is mainly derived from the solid solution strengthening of Mo and Zr atoms. The high temperature strength increases with the larger negative mixing enthalpy and the higher melting temperatures for the Mo<sub><em>x</em></sub>NbTiZr<sub><em>y</em></sub> alloys as well as other bcc solid solution RMPEAs. Dynamic recrystallization is more sluggish in MoNbTiZr<sub>0.2</sub> alloy compressed at 1200 °C. A phenomenological parameter <em>δGb</em>/<em>γ</em> is proposed to effectively estimate the ductility at room temperature for the Mo<sub><em>x</em></sub>NbTiZr<sub><em>y</em></sub> alloys and also other bcc solid solution RMPEAs. The formation of tortuous dislocations and abundant dislocation loops contributes to the better ductility of the Mo<sub><em>x</em></sub>NbTiZr<sub><em>y</em></sub> alloys with a lower Mo content. Moreover, oxidation resistance at 1200 °C has also been discussed for the Mo<sub><em>x</em></sub>NbTiZr<sub><em>y</em></sub> alloys.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107138"},"PeriodicalIF":4.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578035","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 degradation of ultrahigh-temperature ceramics based on HfB2–30vol%SiC in subsonic nitrogen plasma flow

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-05 DOI: 10.1016/j.ijrmhm.2025.107139

Elizaveta P. Simonenko , Nikolay P. Simonenko , Aleksey V. Chaplygin , Ilya V. Lukomskii , Semen S. Galkin , Anton S. Lysenkov , Ilya A. Nagornov , Artem S. Mokrushin , Anatoly F. Kolesnikov , Nikolay T. Kuznetsov

{"title":"Surface degradation of ultrahigh-temperature ceramics based on HfB2–30vol%SiC in subsonic nitrogen plasma flow","authors":"Elizaveta P. Simonenko , Nikolay P. Simonenko , Aleksey V. Chaplygin , Ilya V. Lukomskii , Semen S. Galkin , Anton S. Lysenkov , Ilya A. Nagornov , Artem S. Mokrushin , Anatoly F. Kolesnikov , Nikolay T. Kuznetsov","doi":"10.1016/j.ijrmhm.2025.107139","DOIUrl":"10.1016/j.ijrmhm.2025.107139","url":null,"abstract":"<div><div>The behavior of ultrahigh-temperature ceramics of the composition (HfB<sub>2</sub>–30vol%SiC)-2vol%C(graphene) under the influence of subsonic flow of dissociated nitrogen has been studied. It is shown that at the chosen exposure parameters, at the steady-state surface temperature ∼ 2170–2190°С, surface degradation of the material is observed to a depth of about 10–20 μm. This is expressed by the fact that, as a result of the ongoing reactions, silicon carbide is removed from the near surface zone and HfB<sub>2</sub> is transformed into the hexagonal phase of low hafnium nitride Hf<sub>3</sub>N<sub>2</sub>. It is noted that the phase composition of the surface in this case is significantly different from that observed after impact on ceramics based on HfB<sub>2</sub>-SiC supersonic flow of air plasma. The data obtained may be useful for evaluating the prospects of using ceramic composites for the exploration of space bodies with atmospheres of high nitrogen content.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107139"},"PeriodicalIF":4.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578030","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-temperature oxidation performance and corrosion resistance of laser cladded MoNbVTa0.5Six(x=0,0.5) refractory high-entropy alloys

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-05 DOI: 10.1016/j.ijrmhm.2025.107137

Jianhong Peng , Chao Wang , Dong Lu , Tao Wang , Ouchuan Lin

{"title":"High-temperature oxidation performance and corrosion resistance of laser cladded MoNbVTa0.5Six(x=0,0.5) refractory high-entropy alloys","authors":"Jianhong Peng , Chao Wang , Dong Lu , Tao Wang , Ouchuan Lin","doi":"10.1016/j.ijrmhm.2025.107137","DOIUrl":"10.1016/j.ijrmhm.2025.107137","url":null,"abstract":"<div><div>This study investigated the performance differences between MoNbVTa<sub>0.5</sub>Si<sub>x</sub> (x = 0,0.5) refractory high-entropy alloy coatings fabricated by laser cladding. The phase composition, high-temperature oxidation resistance, corrosion resistance, and microhardness of the coating were explicitly discussed. The phase composition indicates that both are composed of a main BCC phase, and MoNbVTa<sub>0.5</sub>Si<sub>0.5</sub> also has a silicide phase. Due to the dense and uniform SiO<sub>2</sub> oxide layer covering the coating surface, MoNbVTa<sub>0.5</sub>Si<sub>0.5</sub> exhibits better oxidation resistance in high-temperature oxidation tests. The mass gain of MoNbVTa<sub>0.5</sub>Si<sub>0.5</sub> is 7.11 mg·cm<sup>−2</sup> at 800 °C, which is greater than that of MoNbVTa<sub>0.5</sub> (5.24 mg·cm<sup>−2</sup>). But It is 68 mg·cm<sup>−2</sup> and 67 mg·cm<sup>−2</sup> at 1000 and 1200 °C, less than 73 mg·cm<sup>−2</sup> and 71 mg·cm<sup>−2</sup> of MoNbVTa<sub>0.5</sub>. The electrochemical test shows that the self-corrosion current of MoNbVTa<sub>0.5</sub>Si<sub>0.5</sub> is 0.030 μA·cm<sup>−2</sup>, the self-corrosion current of MoNbVTa<sub>0.5</sub> is 0.032 μA·cm<sup>−2</sup>. The results of microhardness tests show that the average hardness of MoNbVTa<sub>0.5</sub>Si<sub>0.5</sub> is 772 HV, greater than that of MoNbVTa<sub>0.5</sub> (743 HV).</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107137"},"PeriodicalIF":4.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578033","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

A comprehensive study for microstructure and properties of Mo2TiAlC2 MAX phase: Linking first-principle simulation and experimental approach

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-04 DOI: 10.1016/j.ijrmhm.2025.107134

Jiachen Zhang , Qingze Na , Pengfa Feng , Yufei Zuo , Fanshu Geng , Tiantian Ma , Rui Li , Guojun Zhang , Haijun Su

引用次数: 0

Densification and property improvement of Mo-Cu immiscible alloys processed by repressing and re-sintering

IF 4.2 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-02 DOI: 10.1016/j.ijrmhm.2025.107131

Ning Luo , Manhua Chen , Zhengyang Ding , Benrui Hai , Bingbo Niu , Xiaochao Wu , Di Mei , Qingkui Li , Jilin He

{"title":"Densification and property improvement of Mo-Cu immiscible alloys processed by repressing and re-sintering","authors":"Ning Luo , Manhua Chen , Zhengyang Ding , Benrui Hai , Bingbo Niu , Xiaochao Wu , Di Mei , Qingkui Li , Jilin He","doi":"10.1016/j.ijrmhm.2025.107131","DOIUrl":"10.1016/j.ijrmhm.2025.107131","url":null,"abstract":"<div><div>Mo-Cu immiscible alloys, due to their good electrical and thermal conductivities as well as excellent mechanical properties, exhibit great application potential as electrical-contact and thermal-management materials in power transportation, domestic appliance and electronic information fields. However, the immiscibility and low wetting ability of Mo and Cu tend to cause that the low relative density and poor physical-mechanical properties of Mo-Cu alloys prepared by conventional powder metallurgy technologies. In this work, repressing and re-sintering technologies together with powder pretreatment are employed to densify Mo-25Cu (wt%) immiscible alloys processed by a liquid sintering with H<sub>2</sub> protection and thus improve their physical-mechanical properties. The results indicate that microstructures of all alloys mainly consist of Mo phase domains surrounded by mesh Cu phases. With repressing and re-sintering proceeding, relative densities and physical-mechanical properties of the alloys processed by whether the mixed powder or the milled powder both gradually increase. This mainly results from two aspects of reasons: i) the capillary filling effect of Cu melt during the sintering and ii) the collective motion of two phases dominated by the plastic deformation of meshy Cu phase during the isostatic loading. More importantly, it is found that all properties of the consolidated alloys using the milled powder are better, which could be attributed to the relatively even microstructure because of the more homogeneous phase distribution in the milled powder. This study can promote the advance of investigations on processing, microstructure and properties of high-performance immiscible alloys manufactured by net shape forming.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"130 ","pages":"Article 107131"},"PeriodicalIF":4.2,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551597","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