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Diffraction Peak Broadening Studies in Al2O3 (Whisker) Composites

Published online by Cambridge University Press:  10 January 2013

C. Balasingh ,
Alias Abuhasan  and
P. K. Predecki
C. Balasingh
Affiliation:
Department of Engineering, University of Denver, Denver, Colorado, 80208, U.S.A.
Alias Abuhasan
Affiliation:
Department of Engineering, University of Denver, Denver, Colorado, 80208, U.S.A.
P. K. Predecki
Affiliation:
Department of Engineering, University of Denver, Denver, Colorado, 80208, U.S.A.
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Abstract

Diffraction peak broadening analyses were carried out on diffraction profiles of several reflections from hot-pressed α-Al2O3 containing 29, 18 and 10 volume % β-SiC whiskers. The data were analyzed and compared using four different integral breadth methods for microstrain and crystalline size. All four methods gave comparable results, within an order of magnitude, for the microstrains in each phase: (2-15 × 10−4 for the matrix and (6-19 × 10−4 for the whiskers). Microstrains in both matrix and whiskers decreased with decreasing volume % of whiskers for all four methods. Trends in the crystallite size were less consistent but for the matgrix, an incrfease from ∼665 to 1565Å was found with decreasing whisker content using DeKeijser's method.

Type
Research Article
Information
Powder Diffraction , Volume 6 , Issue 1 , March 1991 , pp. 16 - 19
Copyright
Copyright © Cambridge University Press 1991

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