J. Phys. Colloques
Volume 47, Number C7, Novembre 198633rd International Field Emission Symposium / 33ème Symposium International d'Emission de Champ
|Page(s)||C7-245 - C7-249|
J. Phys. Colloques 47 (1986) C7-245-C7-249
A MICROSTRUCTURAL STUDY OF Co-20 wt.% Cr-10 wt.% Al USING APFIM AND TEMM.G. BURKE et J.R. CAOLA
Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA 15261, U.S.A.
CoCrAl alloys, which are widely used as oxidation-resistant coatings on high temperature nicke1-base superalloy turbine components, have been examined by APFIM and AEM. The complex microstructures that are developed in these alloys are readily amenable to APFIM-TEM characterization. In this paper, we report microstructural and microchemical observations of the phases present in a Co-20 wt. % Cr-10 wt. % Al alloy (nominal composition) with particular emphasis on the combined TEM-APFIM identification of fine second phase precipitates.