Phase Equilibria in Nb–Mo-Rich Zone of the Nb–Si–Mo Ternary System

Chao-Li Ma; Yi Tan; Hisao Tanaka; Aoki Kasama; Ryohei Tanaka; Seiji Miura; Yosinao Mishima; Shuji Hanada

doi:10.2320/matertrans1989.41.1329

Chao-Li Ma, Yi Tan, Hisao Tanaka, Aoki Kasama, Ryohei Tanaka, Seiji Miura, Yosinao Mishima, Shuji Hanada

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Keywords: liquidus surface projection, isothermal section, phase equilibria, microstructure, phase diagram, niobium-molybdenum-silicon ternary system, in-situ composite

JOURNAL FREE ACCESS

2000 Volume 41 Issue 10 Pages 1329-1336

DOI https://doi.org/10.2320/matertrans1989.41.1329

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Abstract

Microstructures and phase equilibria in cast and annealed Nb–Mo–Si alloys near the Nb–Mo binary were studied using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and electron beam microprobe analysis (EPMA). A broad range of Nb and Mo compositions were investigated for Si compositions up to 30 mol%. Microstructural and microchemical evidence provide a clear definition of the Nb–Mo–Si liquidus surface projection and an isothermal section diagram at 1973 K.

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