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Effect of Grain Shape on Abnormal Grain Growth in Liquid‐Phase‐Sintered Nb 1− x Ti x C–Co Alloys
Author(s) -
Choi Kyoon,
Hwang g M.,
Kim DohY.
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.tb00453.x
Subject(s) - grain growth , materials science , nucleation , sintering , niobium , abnormal grain growth , metallurgy , titanium , grain size , phase (matter) , alloy , crystallography , analytical chemistry (journal) , chemistry , chromatography , organic chemistry
The effect of titanium substitution for niobium on the grain shape change, grain growth inhibition, and abnormal grain growth during liquid‐phase sintering of Nb 1− x Ti x C–Co alloy was studied. With increased titanium substitution, the shape of the Nb 1− x Ti x C grains in the liquid cobalt matrix was changed from a cube with round corners to a cube with angular corners, which implied increased edge energy. As the grain corners became more angular, the grain growth became markedly inhibited, and abnormal grain growth occurred. The results could be best explained by the increased edge energy of the interface of the Nb 1− x Ti x C grains, which increased the barrier for the growth by two‐dimensional nucleation.