Ostwald ripening of liquid phase sintered Cu-Co dispersions at high volume fractions

被引：34
作者：
Bender, W [1 ]
Ratke, L [1 ]
机构：
[1] DLR, Inst Space Simulat, D-51140 Cologne, Germany
来源：
ACTA MATERIALIA | 1998年 / 46卷 / 04期
关键词：
D O I：
10.1016/S1359-6454(97)00317-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An experimental study on the influence of a finite volume fraction of solid on Ostwald ripening of Cu-Co dispersions is presented. Cu-Co alloys with volume fractions of solid Co-particles in the range From 0.25 to 0.7 were annealed at 1473 K for times between 5 min and 70 h such that the Co particles coarsened within a liquid Gu(Co) matrix. The coarsening of the Co-particles was analyzed by various image analysis methods to yield statistically significant results. The experimental results on the coarsening rate and the particle size distribution as they vary with volume fraction are presented. The results show that there is not a definitive effect of the volume fraction on the rate of coarsening and that in all cases investigated the size distributions are broader than predicted by any theory of Ostwald ripening. (C) 1998 Acta Metallurgica Inc.
引用
收藏
页码：1125 / 1133
页数：9
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