Effect of Cr addition on microstructure and oxidation resistance of a Ti5Si3-containing MoSiBTiC alloy. (15th April 2020)

• Record Type: Journal Article
• Authors: Hatakeyama, Tomotaka; Sekido, Nobuaki; Yoshimi, Kyosuke
• Is Part Of: Corrosion science. Volume 166(2020)
• Publication Date: 2020-04-15
• Subjects: A. Alloy -- A. Intermetallics -- B. Weight loss -- C. High temperature corrosion -- C. Oxidation; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.108418
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: The effect of Cr on the oxidation resistance of MoSiBTiC alloy is investigated. Substitution of 10 at. % Cr hardly changes the microstructure of the alloy. Cr addition significantly enhance the oxidation resistance of the alloy at 800 °C. Abstract: The effect of Cr addition on the oxidation behaviour of multiphase Mo–28Ti–14Si–6C–6B (at. %) alloy composed of Mo solid solution, Mo5 SiB2, Ti5 Si3, and TiC phases was investigated. Replacement of 10 at. % Cr for Mo hardly changed the microstructure of the alloy and significantly enhanced its oxidation resistance at 800 °C. At 1100 °C, the Cr-added MoSiBTiC alloy showed less weight loss than the Cr-free base alloy. However, Cr addition had little effect on the substrate reduction, particularly for longer oxidation periods, due to the high volatility of Cr oxide at higher temperatures.