通过球磨和放电等离子烧结制备的W-Ta-Mo-Nb-V-Cr-Zr-Ti合金的结构与相组成

Structure and Phase Composition of a W-Ta-Mo-Nb-V-Cr-Zr-Ti Alloy Obtained by Ball Milling and Spark Plasma Sintering.

作者信息

Ditenberg Ivan A, Smirnov Ivan V, Korchagin Michail A, Grinyaev Konstantin V, Melnikov Vladlen V, Pinzhin Yuriy P, Gavrilov Alexander I, Esikov Maksim A, Mali Vyacheslav I, Dudina Dina V

机构信息

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, 634055 Tomsk, Russia.

Department of Metal Physics, Faculty of Physics, National Research Tomsk State University, 634050 Tomsk, Russia.

出版信息

Entropy (Basel). 2020 Jan 24;22(2):143. doi: 10.3390/e22020143.

DOI:10.3390/e22020143

PMID:33285918

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7516556/

Abstract

In this paper, the structural characteristics of a W-Ta-Mo-Nb-V-Cr-Zr-Ti non-equiatomic refractory metal alloy obtained by spark plasma sintering (SPS) of a high-energy ball-milled powder mixture are reported. High-energy ball milling resulted in the formation of particle agglomerates ranging from several tens to several hundreds of micrometers. These agglomerates were composed of micrometer and submicrometer particles. It was found that, during ball milling, a solid solution of A2 structure formed. The grains of the sintered material ranged from fractions of a micrometer to several micrometers. During SPS, the phase transformations in the alloy led to the formation of a Laves phase of C15 structure and ZrO and ZrO nanoparticles. The microhardness of the ball-milled alloy and sintered material was found to be 9.28 GPa ± 1.31 GPa and 8.95 GPa ± 0.42 GPa, respectively. The influence of the processing conditions on the structure, phase composition, and microhardness of the alloy is discussed.

摘要

本文报道了通过对高能球磨粉末混合物进行放电等离子体烧结（SPS）获得的W-Ta-Mo-Nb-V-Cr-Zr-Ti非等原子难熔金属合金的结构特征。高能球磨导致形成了尺寸从几十微米到几百微米不等的颗粒团聚体。这些团聚体由微米级和亚微米级颗粒组成。研究发现，在球磨过程中形成了A2结构的固溶体。烧结材料的晶粒尺寸从几分之一微米到几微米不等。在SPS过程中，合金中的相变导致形成了C15结构的Laves相以及ZrO和ZrO纳米颗粒。球磨合金和烧结材料的显微硬度分别为9.28 GPa±1.31 GPa和8.95 GPa±0.42 GPa。讨论了加工条件对合金的结构、相组成和显微硬度的影响。