Properties of Hot-Pressed Cr-Cr3Si
Abstract
Previously, Cr-Cr3Si in-situ composites produced by arc-melting were shown to have good strengths at high temperatures. For example, samples of a 25% Cr and 75% Cr3Si composite achieved bend strengths of 135 MPa at 1200°C. However, there is potential for even higher strengths at high temperatures and a need for improvement in the low temperature strength and toughness. In order to improve the properties, two approaches were taken. The first used powder metallurgy to develop a better microstructure than in the cast alloys, to try to improve both strength and toughness. The second approach was to incorporate erbia into the composites, to improve the strength and stability of the microstructure at elevated temperatures. High density samples of hot pressed Cr-15.5Si and Cr-18.6Si have been produced by mixing Cr and Cr3Si powders and hot pressing in a graphite die. Erbia powders have been incorporated into some compacts for comparison. Microstructures have been characterized and mechanical properties determined. Both the hot pressing and the erbia affected the properties. In addition the erbia had a significant effect on consolidation of the samples.
Recommended Citation
J. W. Newkirk and J. E. Price, "Properties of Hot-Pressed Cr-Cr3Si," Materials Research Society Symposium - Proceedings, vol. 364, no. 2, pp. 955 - 959, Jan 1995.
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
0272-9172
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Publication Date
01 Jan 1995