Title of article :
Ruby micro-piezospectroscopy in GdAlO3/Al2O3(/ZrO2), Er3Al5O12/Al2O3(/ZrO2) and Y3Al5O12/Al2O3(/ZrO2) binary and ternary directionally solidified eutectics
Author/Authors :
Gouadec، نويسنده , , Gwénaël and Makaoui، نويسنده , , Karim and Perrière، نويسنده , , Loïc and Colomban، نويسنده , , Philippe and Mazerolles، نويسنده , , Léo، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Abstract :
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 α-alumina and cubic zirconia. Such measurements are reported for the first time in the GAP containing eutectics.
usual hydrostatic assumption, we conclude to a residual compression in the range of ∼70–400 MPa depending on the sample composition. The validity of the hydrostatic assumption is questioned when a microscope is used for the measurements.
Keywords :
Non-Destructive Evaluation , Residual stress , Directionally solidified eutectics , Al2O3 , Piezospectroscopy
Journal title :
Journal of the European Ceramic Society
Journal title :
Journal of the European Ceramic Society