Effects of Applied Pressure on the Atomic Diffusion Coefficient During Spark Plasma Sintering of Crystalline Powders

被引：0
|
作者：
Xinxin Li
Chao Yang
Zhao Liu
Liming Zou
Zhi Wang
Weiwen Zhang
机构：
[1] South China University of Technology,National Engineering Research Center of Near
[2] South China University of Technology,net
[3] Guangdong Academy of Sciences,shape Forming for Metallic Materials
来源：
JOM | 2019年 / 71卷
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摘要：
We report on the establishment of a framework to determine the value of the pressure-related atomic diffusion coefficient, D, and its use. Moreover, we clarify the underlying relationships between the as-determined D and the active densification mechanisms during crystalline powder sintering. During spark plasma sintering, the theoretical framework is validated by comparing the densification behaviors of Ti40.6Zr9.4Cu37.5Ni9.4Sn3.1 crystalline alloy powders with two types of particle sizes. Our results demonstrate quantitatively that the superimposition of an applied pressure enhances the atomic diffusion to promote densification during crystalline powder sintering.
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页码：2475 / 2483
页数：8
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