Effect of coalescence on the grain coarsening during liquid-phase sintering of TaC-TiC-Ni cermets

被引：56

作者：

Choi, K

Choi, JW

Kim, DY ^{[1
]}

Hwang, NM

机构：

[1] Seoul Natl Univ, Coll Engn, Ctr Microstruct Sci & Mat, Seoul 151742, South Korea

[2] Seoul Natl Univ, Coll Engn, Sch Mat Sci & Engn, Seoul 151742, South Korea

[3] Korea Res Inst Stand & Sci, Daedok 305600, South Korea

来源：

ACTA MATERIALIA | 2000年 / 48卷 / 12期

关键词：

sintering; carbides; grain growth; microstructure;

D O I：

10.1016/S1359-6454(00)00117-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

During heat treatment of TaC-2TiC-30Ni (in wt%) specimens at 1400 degrees C, abnormally large and faceted (Ta, Ti)C grains appeared. These abnormal grains usually coalesced with surrounding small grains and grain boundaries were formed between them. Inside the abnormally grown large grains, many small grains were entrapped. The observed abnormal grain growth (AGG) was explained in terms of a two-dimensional nucleation controlled growth mechanism. Coalescence was suggested to enhance the growth rate because re-entrant edges due to grain boundaries provide easier two-dimensional nucleation sites, (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：3125 / 3129

页数：5

共 39 条

[31] ORIGIN AND GROWTH-KINETICS OF PLATELIKE ABNORMAL GRAINS IN LIQUID-PHASE-SINTERED ALUMINA [J].