EVALUATION OF SLOW CRACK GROWTH IN CERAMICS

被引：0
作者：
Rice, Roy W. [1 ]
Wu, Carl Cm [2 ]
机构：
[1] 5411 Hopark Dr, Alexandria, VA 22310 USA
[2] USN, Res Lab, Washington, DC 20375 USA
来源：
FRACTOGRAPHY OF GLASSES AND CERAMICS V | 2007年 / 199卷
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D O I：
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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 susceptibility of a range of ceramics to water driven slow crack growth (SCG) was tested via comparison of flexure strengths in air at 22 degrees C versus in liquid N-2 at -196 degrees C. Tested specimens were fractographically examined for fracture origins, fracture mode (i.e. the relative amounts of trans- versus inter- granular fracture) and whether specimen fractures were inconsistent with the assumptions of the test and hence needed to be rejected. Fractography proved to be a valuable addition to the evaluation, e.g. showing frequent intergranular fracture implying SCG in thin grain boundary oxide films in nonoxides with oxide additions and in commercial alumina.
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页码：105 / +
页数：3
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