Combustion Synthesis of Cermets from Granular Mixtures Ti–C–NiCr for Protective Coatings

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI:10.3103/s1061386224010072

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

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Abstract

The combustion modes of granular mixtures (100 – X)(Ti + C) + XNiCr, X = 0–30%, were studied. The experimental setup provided filtration of impurity gases released during combustion, either in the direction of propagation of the combustion front, or through the side surface of the sample. The comparison of burning velocities in different gas filtration schemes indicates the influence of convective heat transfer on the combustion patterns of mixtures with X < 30%. A method was proposed for determining the composition of the mixture in which the transition to the convective combustion mode occurs. The content of impurity gases in mixtures of different compositions was estimated quantitively. The comparison of experimental data with calculations based on the theory of filtration combustion showed that there is a conductive combustion mode for all mixtures of 0.6-mm granules and a mixture of 1.7-mm granules with X = 30%. XRD analysis of the synthesis products revealed no intermetallic phases, regardless of the size of the granules.

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从用于保护涂层的 Ti-C-NiCr 粒状混合物燃烧合成金属陶瓷

摘要研究了颗粒状混合物 (100 - X)(Ti + C) + XNiCr（X = 0-30%）的燃烧模式。实验装置对燃烧过程中释放的杂质气体进行了过滤，过滤的方向可以是燃烧前沿的传播方向，也可以是通过样品的侧表面。不同气体过滤方案下燃烧速度的比较表明，对流传热对 X < 30% 混合物的燃烧模式有影响。提出了一种方法来确定向对流燃烧模式过渡的混合物成分。对不同成分混合物中杂质气体的含量进行了定量估算。实验数据与基于过滤燃烧理论的计算结果的比较表明，所有 0.6 毫米颗粒的混合物以及 X = 30% 的 1.7 毫米颗粒的混合物都存在传导燃烧模式。对合成产物的 XRD 分析表明，无论颗粒大小如何，都没有金属间相。

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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.

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