Thermal Explosion in Ti + Zr + Hf + Nb + Ta + 5С System: Effect of Mechanical Activation

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2023-01-09 DOI:10.3103/S1061386222040136

S. G. Vadchenko, I. D. Kovalev, N. I. Mukhina, A. S. Sedegov, A. S. Rogachev

引用次数: 0

Abstract

The effect of various conditions of mechanical activation of Ti + Zr + Hf + Nb + Ta + 5C mixtures on the microstructure of composite particles, regularities of their ignition, and phase composition of final products was studied. The activation of mixtures was found to decrease the ignition temperature by 600–900°C. It was shown that the intense mechanical activation reduces the activity of the mixture and the subsequent ignition in the thermal explosion mode transforms the mixture into high-entropy compound. Such transformation is not observed in conditions of long-term low-intensity activation.

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Ti + Zr + Hf + Nb + Ta + 5С体系的热爆炸:机械活化效应

研究了Ti + Zr + Hf + Nb + Ta + 5C复合材料机械活化条件对复合颗粒微观结构、着火规律及最终产物相组成的影响。发现混合物的活化使着火温度降低了600-900℃。结果表明，强烈的机械活化降低了混合物的活性，随后在热爆炸模式下的点火使混合物转变为高熵化合物。这种转变在长期低强度激活的条件下是观察不到的。

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.