DENSIFICATION MECHANISMS IN HIGH-PRESSURE HOT-PRESSING OF HFB2

被引：52

作者：

KALISH, D

CLOUGHERTY, EV

机构：

[1] ManLabs, Incorporated, Cambridge, Massachusetts

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1969年 / 52卷 / 01期

关键词：

D O I：

10.1111/j.1151-2916.1969.tb12654.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The fabrication temperature was the principal variable in a kinetic study of the densification of hafnium diboride in high‐pressure hot‐pressing. Densification studies for conventional hot‐pressing were reviewed and correlated with the high‐pressure hot‐pressing results. The consolidation of HfB2 in the open pore region during high‐pressure hot‐pressing is attributed to particle rearrangement caused by grain boundary sliding and fragmentation. The final stage of densification (relative density >90%) was analyzed in terms of the Nabarro‐Herring vacancy creep model. An activation energy of 22,900 cal/mole was obtained for the rate‐controlling step in the creep process. Copyright © 1969, Wiley Blackwell. All rights reserved

引用

页码：26 / +

页数：1

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