THE INFLUENCE OF SYNTHESIS TEMPERATURE ON THE PHASE COMPOSITION AND STRUCTURE OF TERNARY COMPOUNDS PRODUCED FROM TiH2–Si–C POWDER MIXTURES

 
O.Suprun,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2019, Т.11, #01/02
http://www.materials.kiev.ua/article/2784

Abstract

The paper examines the formation of phases and structurization in ternary compounds produced by thermal synthesis from the TiH2–Si–C powder mixture. The thermal synthesis was carried out in vacuum at 1150, 1300, and 1400 °С. According to X-ray diffraction and structural analysis, titanium carbide is the major phase in the alloy after the synthesis at 1150 °С. There are also a Ti5Si3 silicide phase and an insignificant amount of free carbon in the alloy. When synthesis temperature increases to 1300 °С, the titanium carbide content decreases and a Ti5Si4 silicide phase and ternary Ti3SiC2 compound show up in the alloy. When synthesis temperature increases further to 1400 °С, the alloy mainly consists of laminate-like ternary Ti3SiC2 grains and an insignificant amount of titanium carbide and Ti5Si4 intermetallide. An increase in the synthesis temperature from 1150 to 1400 °С leads to a significant growth of grains representing the main alloy components.


CARBIDES, INTERMETALLIC, MAX PHASE, POWDER, SILICON, STRUCTURE, THERMAL SYNTHESIS, TITANIUM, X-RAY DIFFRACTION