Forced SHS Compaction of TiC–NiTi Composites

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2023-09-05 DOI:10.3103/S1061386223030044

Yu. V. Bogatov, V. A. Shcherbakov, D. Yu. Kovalev

引用次数: 0

Abstract

TiC–NiTi cermet composites were fabricated by forced SHS compaction from (Ti + C + Ni) mixtures with varying content of Ni + Ti from 28 to 90 wt %. The phase composition and microstructure were characterized by X-ray diffraction method, scanning electron microscopy, and energy dispersive spectroscopy. The microstructure of composites was shown to contain spherical TiC particles surrounded by the matrix including TiNi₃, TiNi(B2), Ti₂Ni, and Ti₃Ni₄ phases. As Ni + Ti content was increased, there was a change in the stoichiometry of TiC (from TiC₁ to TiC_0.43) and its particle size (from 6.5 to 0.2 μm). It was found that the microhardness of TiC–NiTi composites dropped markedly from 23.5 to 6.4 GPa.

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TiC-NiTi复合材料的强制SHS压实

将Ni + Ti含量从28 wt %到90 wt %不等的(Ti + C + Ni)混合物通过强制SHS压实制备TiC-NiTi陶瓷复合材料。采用x射线衍射、扫描电镜和能量色散光谱对其相组成和微观结构进行了表征。复合材料微观结构为由基体包围的球形TiC颗粒，包括tin3、TiNi(B2)、Ti2Ni和Ti3Ni4相。随着Ni + Ti含量的增加，TiC的化学计量学(从TiC1到TiC0.43)和粒径(从6.5 μm到0.2 μm)发生了变化。结果表明，TiC-NiTi复合材料的显微硬度从23.5明显下降到6.4 GPa。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Self-Propagating High-Temperature Synthesis MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

33.30%

发文量

期刊介绍： International Journal of Self-Propagating High-Temperature Synthesis is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.