Properties of Hot-Pressed Cr-Cr₃Si

Author

Joseph William Newkirk, Missouri University of Science and TechnologyFollow
Joseph E. Price

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," Proceedings of the Materials Research Society Symposium (1994, Boston, MA), vol. 364, no. 2, pp. 955 - 959, Materials Research Society, Nov 1994.

The definitive version is available at https://doi.org/10.1557/PROC-364-955

Meeting Name

Materials Research Society Symposium L-High Temperature Ordered Intermetallic Alloys VI (1994: Nov. 28-30, Boston, MA)

Department(s)

Materials Science and Engineering

Keywords and Phrases

Composite Materials; Density (Specific Gravity); Erbium Compounds; Fracture Toughness; Hot Pressing; Mechanical Properties; Microstructure; Powder Metallurgy; Powders; Stability; Strength of Materials; Temperature; Cast Alloys; Composites; Creep Strength; Dispersoid; Elevated Temperature; Erbia; Erbia Powders; Chromium Alloys

International Standard Serial Number (ISSN)

0272-9172

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1994 Materials Research Society, All rights reserved.

Publication Date

01 Nov 1994