{"title":"Forced SHS Compaction of TiC–NiTi Composites","authors":"Yu. V. Bogatov, V. A. Shcherbakov, D. Yu. Kovalev","doi":"10.3103/S1061386223030044","DOIUrl":null,"url":null,"abstract":"<p>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 TiNi<sub>3</sub>, TiNi(B2), Ti<sub>2</sub>Ni, and Ti<sub>3</sub>Ni<sub>4</sub> phases. As Ni + Ti content was increased, there was a change in the stoichiometry of TiC (from TiC<sub>1</sub> to TiC<sub>0.43</sub>) 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.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"32 3","pages":"242 - 246"},"PeriodicalIF":0.5000,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Self-Propagating High-Temperature Synthesis","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.3103/S1061386223030044","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
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 TiC0.43) 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.
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.
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