Mechanical Behavior, Microstructure and Phase Composition of Free Sintered Al2O3-B4C Whisker Composites
Abstract
B4C whisker, Al2O3 matrix composites have been successfully densified at 1800°C by pressureless sintering. Small additions of B4C proved to be a sintering aid to the densification via mechanisms other than being a grain growth inhibitor. A minor interfacial chemical reaction was detected from X-ray diffraction analysis. An increased fracture toughness and hardness were realized in the composites with 5 approx. 20 vol% whiskers. The maximum fracture toughness and Vicker's hardness reached were 6.24 MPa.m 1/2 and 1776 Kg/mm2. However, an improvement in the flexural strength was not observed, which resulted from the coarse whisker and grain sizes.
Recommended Citation
X. Lin and P. D. Ownby, "Mechanical Behavior, Microstructure and Phase Composition of Free Sintered Al2O3-B4C Whisker Composites," Ceramic Engineering and Science Proceedings, vol. 17, no. 3, pp. 273 - 277, Dec 1996.
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
0196-6219
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Publication Date
01 Dec 1996