从粉末混合物合成 TiC-NiCr 金属陶瓷的模式：镍铬含量和钛颗粒尺寸的影响

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI:10.3103/s1061386224010060

B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov

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引用次数: 0

摘要

摘要研究了粉末混合物 (100 - X)(Ti + C) + XNiCr（X = 0-20%）的燃烧模式以及合成产物的相组成。在对流-传导模型的框架内，对含有特征尺寸为 60 和 120 μm 的钛粉的混合物来说，燃烧速度与镍铬含量的关系具有不同的性质，这是因为在燃烧前沿释放的杂质气体具有阻滞作用。对于细钛粉和粗钛粉的混合物，在燃烧前沿前加热钛颗粒的条件并不满足。燃烧产物的 XRD 光谱显示，必须使用细钛粉才能获得无金属间化合物副相的金属陶瓷。

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Patterns of Synthesis of TiC–NiCr Cermets from Powder Mixtures: Influence of Nichrome Content and Titanium Particles Size

Abstract

The combustion patterns of powder mixtures (100 – X)(Ti + C) + XNiCr, X = 0–20%, and phase composition of synthesis products were studied. The different nature of the dependence of the burning velocity on the nichrome content for blends containing titanium powders with particles of characteristic sizes of 60 and 120 μm was explained within the framework of the convective–conductive model by the retarding influence of impurity gases released ahead of the combustion front. The conditions for warming up Ti particles before the front were not met for mixtures of fine and coarse titanium powders. XRD spectra of combustion products showed the necessity of using fine titanium powder to obtain cermets without side phases of intermetallic compounds.

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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.