Effect of Ta Content on Microstructure and Mechanical Properties of Nb/ Nb5Si3 In-situ Composites

Acta Metall Sin

2006, Vol. 42

Issue (10): 1061-1064 DOI:

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Effect of Ta Content on Microstructure and Mechanical Properties of Nb/ Nb5Si3 In-situ Composites

中国科学院金属研究所

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. Effect of Ta Content on Microstructure and Mechanical Properties of Nb/ Nb5Si3 In-situ Composites. Acta Metall Sin, 2006, 42(10): 1061-1064 .

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Abstract Nb/ Nb5Si3 in-situ composites were prepared by arc melting in vacuum. Effects of Ta content on the microstructure and mechanical properties of the alloys were investigated. The results show that Ta mainly distributes in Nb solid solution phase. With increasing Ta content the amount of Nb5Si3 phase decreases, while that of Nb solid solution phase increases. Ta promotes the transformation ofβ-Nb5Si3 to α-Nb5Si3. The addition of Ta is beneficial to the compressive strength at room temperature and high temperature. In addition, the compressive strength of 5at.% Ta-containing alloy is superior to that of other alloys at high temperature.

Key words: Nb/ Nb5Si3 in-situ composites intermetallic alloying microstructure compressive properties

Received: 16 March 2006

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TG146.4

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2006/V42/I10/1061

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