{"title":"Microstructure and mechanical properties of NbMoTaW porous refractory high entropy alloy processed by powder metallurgy","authors":"Baoguang Zhang , Yuanping Huang , Zhifu Huang , Jian Wang","doi":"10.1016/j.ijrmhm.2025.107063","DOIUrl":null,"url":null,"abstract":"<div><div>Porous NbMoTaW refractory high entropy alloys (RHEAs), which possess an outstanding balance between mechanical properties and lightweight, were manufactured via powder metallurgy. Even sintering at 2200 °C, the average grain size can still be maintained at about 5 μm owing to the hysteresis diffusion effect. The present porous NbMoTaW RHEA exhibits a remarkable specific compressive strength of 60.7 MPa·g<sup>−1</sup>·cm<sup>3</sup>, which is mainly ascribed to the combined action of strong solid solution strengthening and grain boundary strengthening. This work reveals the potential of replacing porous tungsten (W) with RHEAs in some applications.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"128 ","pages":"Article 107063"},"PeriodicalIF":4.6000,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Refractory Metals & Hard Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263436825000289","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Porous NbMoTaW refractory high entropy alloys (RHEAs), which possess an outstanding balance between mechanical properties and lightweight, were manufactured via powder metallurgy. Even sintering at 2200 °C, the average grain size can still be maintained at about 5 μm owing to the hysteresis diffusion effect. The present porous NbMoTaW RHEA exhibits a remarkable specific compressive strength of 60.7 MPa·g−1·cm3, which is mainly ascribed to the combined action of strong solid solution strengthening and grain boundary strengthening. This work reveals the potential of replacing porous tungsten (W) with RHEAs in some applications.
期刊介绍：
The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
