Structure, Phase Composition, and Hardness of Ni3Al–TiC Composite Fabricated by Thermal Explosion of Nickel, Aluminum, and Titanium Carbide Powder Mixture

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2023-12-01 DOI:10.3103/s1061386223040052

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Abstract

Using scanning electron microscopy, X-ray phase analysis, and hardness measurement we investigated the structure, phase composition, and mechanical properties of Ni₃Al–TiC composite (TiC content varied in the interval from 0 to 30 vol %) fabricated by self-propagating high-temperature synthesis in the thermal explosion mode from a powder mixture of nickel, aluminum, and titanium carbide. It was found that the synthesis of Ni₃Al intermetallic compound occurred almost completely when TiC content in the green powder mixture was up to 15 vol %. TiC particles were arranged in clusters and individually. Each particle, including in the clusters, was surrounded with the matrix material. The hardness of the composite essentially increased with an increase in the TiC content in the green powder mixture up to 10 vol %. Then the hardness gain was slow. The matrix of the composite contained Ni₃Al and NiAl intermetallic phases as well as unreacted nickel when the fraction of TiC in the green powder mixture increased to 30 vol %. TiC particles were adjacent to each other in the clusters and there was a free volume between them. Thus, it was concluded that the synthesis of Ni₃Al–TiC composite under thermal explosion condition from the mixture of nickel, aluminum, and titanium carbide powders satisfactorily took place when the fraction of titanium carbide in the green powder mixture was 15 vol % and less.

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镍、铝和碳化钛粉末混合物热爆炸制备的 Ni3Al-TiC 复合材料的结构、相组成和硬度

摘要我们使用扫描电子显微镜、X 射线相分析和硬度测量方法，研究了镍 3Al-TiC 复合材料（TiC 含量在 0 至 30 Vol % 之间变化）的结构、相组成和机械性能，该复合材料是由镍、铝和碳化钛的粉末混合物在热爆炸模式下通过自蔓延高温合成制造而成的。研究发现，当绿色粉末混合物中的 TiC 含量达到 15 Vol % 时，几乎完全合成了 Ni3Al 金属间化合物。TiC 颗粒既有成簇排列的，也有单独排列的。每个颗粒，包括簇中的颗粒，都被基体材料包围。复合材料的硬度基本上随着绿色粉末混合物中 TiC 含量的增加而增加，最高可达 10 Vol %。随后，硬度增加缓慢。当绿色粉末混合物中的 TiC 含量增加到 30 Vol % 时，复合材料的基体中含有 Ni3Al 和 NiAl 金属间相以及未反应的镍。簇中的 TiC 颗粒彼此相邻，它们之间存在自由体积。因此，可以得出结论，当碳化钛在绿色粉末混合物中的比例为 15 Vol % 或更低时，镍、铝和碳化钛粉末混合物在热爆炸条件下合成 Ni3Al-TiC 复合材料的效果令人满意。

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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.