D. M. Davydov, E. R. Umerov, A. P. Amosov, E. I. Latukhin
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引用次数: 0
摘要
摘要 通过在空气中对由不同粒度的钛粉、不同形态的碳粉和硅粉组成的绿色混合物进行自蔓延高温合成，制备了基于 Ti3SiC2 MAX 相的多孔骨架的相形成和宏观/微观结构。结果显示了合成样品的孔隙率、抗压强度和定量相组成的比较数据。结果表明，Ti 和 C 粉的分数组成（粒度）以及 C 的形式（石墨、炭黑）对多孔 SHS 骨架的宏观结构有显著影响。使用粗Ti和中胶体石墨粉获得的多孔骨架具有较高的Ti3SiC2 MAX相含量（66%），并具有较高的密度和抗压强度（分别为2.41 g/cm3和104 MPa）。
Influence of Starting Reagents on the Formation of Ti3SiC2 Porous Skeleton by SHS in Air
The phase formation and macro/microstructure of a porous skeleton based on Ti3SiC2 MAX phase prepared by self-propagating high-temperature synthesis of green mixtures consisting of Ti powders differing in particle size, different carbon powder forms, and Si powder in a sand backfill in air. Comparative data on porosity, compressive strength, and quantitative phase composition of synthesized samples were presented. It was established that the fractional composition (particle size) of Ti and C powders, as well as the form of C (graphite, carbon black) influence markedly the macrostructure of porous SHS skeletons. The porous skeleton obtained using coarse Ti and medium colloidal graphite powders was found to have high content of Ti3SiC2 MAX phase (66%) and to possess high density and compressive strength (2.41 g/cm3 and 104 MPa, respectively).
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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