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AES investigations on starting powders for high performance ceramics

Authors:	Holger Jenett Henning Bubert Ralf Riedel Heinz Stadelmann

Affiliation:	(1) Institut für Spektrochemie und angewandte Spektroskopie (ISAS), Bunsen-Kirchhoff-Strasse 11, D-4600 Dortmund 1, Federal Republic of Germany;(2) Pulvermetallurgisches Laboratorium, MPI für Metallforschung, Institut für Werkstoffwissenschaft, Heisenbergstrasse 5, D-7000 Stuttgart 80, Federal Republic of Germany

Abstract:	AES depth profiles on ceramic powders (untreated/hydrolyzed/oxidized/ (Al, Y)₂O₃ coated Si₃N₄, [BaO, SiO₂] coated Al₂O₃) are feasible on thin, homogeneous layers or m sized agglomerations prepared on an Au foil. By means of the depth profiles one can qualitatively characterize the coating around the particles. Factor analysis of the depth profiles on the differently treated Si₃N₄ powders suggests the existence of an Si₂N₂O phase on the oxidized sample.Dedicated to Professor Günther Tölg on the occasion of his 60th birthday

Keywords:	ceramics composite powders Si₃N₄, Si₂N₂O, Al₂O₃ Auger factor analysis
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