ROLE OF GRAIN BOUNDARIES IN SINTERING
ROLE OF GRAIN BOUNDARIES IN SINTERING
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DOI：
10.1111/j.1151-2916.1957.tb12580.x
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发表时间：
1957-01-01
影响因子：
3.9
通讯作者：
BURKE, JE
中科院分区：
文献类型：
--
作者：
BURKE, JE
在烧结过程中，晶界充当晶格空位的汇或扩散路径。因此，晶界的结构将对烧结速率产生重要影响。烧结过程中的晶粒生长改变了晶界相对于孔隙的结构，因此可能显着影响收缩率；例如，对于均匀分布的孔隙，收缩率将随着晶粒尺寸的减小而增加。如果杂质添加增加扩散速率，则它们会增加烧结速率，但它们也可能通过阻碍晶界运动来增加烧结速率。一些实验证据被提出来支持这些结论。
During sintering, grain boundaries act either as sinks or as diffusion paths for lattice vacancies. Thus the configuration of the grain boundaries will have an important effect on the rate of sintering. Grain growth during sintering changes the configuration of grain boundaries relative to pores and thus may markedly influence the shrinkage rate; for example, for uniformly distributed pores the shrinkage rate will increase as the grain size decreases. Impurity additions will increase the sintering rate if they increase diffusion rates, but they may also increase sintering rates by impeding grain‐boundary movement. Some experimental evidence is presented to support these conclusions.