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• 作者：Gw&eacute ; naë ; l Gouadec^a ; ^{gwenael.gouadec@upmc.fr} ; Karim Makaoui^a ; Loï ; c Perri&egrave ; re^b ; ^c ; Philippe Colomban^a ; L&eacute ; o Mazerolles^b
• 关键词：Al2O3 ; Non-destructive evaluation ; Residual stress ; Piezospectroscopy ; Directionally solidified eutectics
• 刊名：Journal of the European Ceramic Society
• 出版年：2012
• 期刊代码：53_09552219
• 类别：ms
• 出版时间：August, 2012
• 卷：32
• 期：10
• 页码：2145-2151
• 文件大小：795 K

摘要

The fluorescence from (naturally present) Cr³⁺ impurities was used to measure the residual stress in the alumina phase of six melt-grown ceramic eutectic composites associating gadolinum aluminum perovskite (GAP), erbium aluminum garnet (EAG) or yttrium aluminum garnet (YAG) with 伪-alumina and cubic zirconia. Such measurements are reported for the first time in the GAP containing eutectics.

In the usual hydrostatic assumption, we conclude to a residual compression in the range of 鈭?0-400 MPa depending on the sample composition. The validity of the hydrostatic assumption is questioned when a microscope is used for the measurements.