CRACK-TIP TRANSFORMATION ZONES IN TOUGHENED ZIRCONIA

被引：84
|
作者：
MARSHALL, DB
SHAW, MC
DAUSKARDT, RH
RITCHIE, RO
READEY, MJ
HEUER, AH
机构：
[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720
[2] CASE WESTERN RESERVE UNIV,DEPT MAT SCI & ENGN,CLEVELAND,OH 44106
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 09期
关键词：
crack tip; partially stabilized zirconia; Raman spectroscopy; toughness; transformations;
D O I：
10.1111/j.1151-2916.1990.tb06743.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：
Transformation zones surrounding cracks in several toughened magnesia‐partially‐stabilized zirconia ceramics are characterized by optical interference measurements of surface uplift and by Raman microprobe spectroscopy. The measurements demonstrate that the volume fraction of transformation is nonuniform within the zone and that the extent of the frontal zone is approximately the same as that of the wake. Results are used to evaluate the crack‐tip shielding stress intensity factor and to compare with the measured fracture toughness. Copyright © 1990, Wiley Blackwell. All rights reserved
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收藏
页码：2659 / 2666
页数：8
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