Accelerated precipitate coarsening due to a concomitant secondary phase transformation

被引：6

作者：

Chen, IW ^{[1
]}

Davenport, A ^{[1
]}

Wang, L ^{[1
]}

机构：

[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

ACTA MATERIALIA | 2003年 / 51卷 / 06期

基金：

美国国家科学基金会;

关键词：

coarsening; phase transformations; theory; simulation; nitrides;

D O I：

10.1016/S1359-6454(02)00570-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of a concomitant secondary phase transformation on the coarsening of spherical precipitates inherited from a previous primary phase transformation is investigated. An extended period of accelerated coarsening and a non-monotonic evolution of the normalized size distribution are found. These results are illustrated using approximate asymptotic solutions to the coarsening equation and computer simulations of coarsening dynamics. Experimental results found in silicon nitride systems, which cannot be explained by the classical coarsening theories, are in good agreement with our model predictions. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：1691 / 1703

页数：13

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