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Microstructural Evolution of Titanium Carbide–Chromium Carbide (TiC–Cr 3 C 2 ) Composites Produced via Combustion Synthesis
Author(s) -
Kunrath Augusto O.,
Reimanis Ivar E.,
Moore John J.
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00259.x
Subject(s) - chromium , materials science , titanium carbide , carbide , titanium , chromium carbide , annealing (glass) , combustion , solid solution , metallurgy , carbon fibers , precipitation , hot pressing , microstructure , composite material , composite number , chemistry , meteorology , physics , organic chemistry
A microstructural analysis of compounds produced by combustion synthesis coupled with hot pressing, for reactions between titanium, chromium, and carbon, was conducted. The reactions were aimed to produce composites of Cr 3 C 2 and TiC at three different volume fractions of each carbide (25/75, 50/50, and 75/25). Large amounts of chromium and carbon were found to be in solution in the B1 rock‐salt structure of TiC. The materials with 25 and 50 vol% of Cr 3 C 2 consisted of 100% (Ti,Cr)C ss solid solution, while the composition with 75 vol% Cr 3 C 2 was formed by Cr 3 C 2 + (Ti,Cr)C ss . Some precipitation of Cr 3 C 2 was achieved by annealing, but a minimum of 20 wt% was always in solution. The 50 vol% Cr 3 C 2 –50 vol% TiC composition was the most affected by the heat treatments. Discontinuous and general precipitation were observed, depending on the annealing conditions. A TTT‐type diagram was plotted for this material.