Microstructure and mechanical properties of NbMoTaW porous refractory high entropy alloy processed by powder metallurgy

IF 4.2 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-01-18 DOI:10.1016/j.ijrmhm.2025.107063

Baoguang Zhang , Yuanping Huang , Zhifu Huang , Jian Wang

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.

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

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.