Effect of Re Addition on Microstructure and Oxidation Resistance of Co-Cr-Ta-Ti-C Alloys-Reference-Cited by-同舟云学术

Effect of Re Addition on Microstructure and Oxidation Resistance of Co-Cr-Ta-Ti-C Alloys

Published:2023-12-25 Issue:1 Volume:14 Page:26
ISSN:2079-6412
Container-title:Coatings
language:en
Short-container-title:Coatings

Author:

Moreau Louis Etienne¹²,Banoth Santhosh²³^ORCID,Ishida Akira²,Murakami Hideyuki¹²^ORCID

Affiliation:

1. Department of Nanoscience and Nanoengineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan

2. Research Center for Structural Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan

3. Department of Mechanical Systems Engineering, Tokyo Metropolitan University, 1-1, Tokyo 192-0397, Japan

Abstract

This study investigated the effect of Re addition on the microstructural evolution and oxidation resistance of Co-Cr-Ta-Ti-C alloys. The alloys tested in this study consisted of a Co-rich matrix with mixed HCP and FCC phases, together with TaTiC2- and Ti-based carbides. The addition of Re promotes the precipitation and growth of a CoCr-rich σ-phase. Differential thermal analysis (DTA) showed that the melting temperatures did not drastically change up to 10 at% Re addition, whereas 15 at% Re addition significantly increased the melting temperature of the alloys. Oxidation tests in air at 1200 °C showed that an excessive Re content could lead to a deterioration in oxidation resistance, mainly due to the accelerated formation of volatile Re oxides.

Publisher

MDPI AG

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces

Link

https://www.mdpi.com/2079-6412/14/1/26/pdf

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