期刊
INTERMETALLICS
卷 52, 期 -, 页码 72-85出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2014.03.015
关键词
Molybdenum silicides; Alloy design; Thermal stability; Crystal growth; Microstructure; Phase interfaces
资金
- Advanced Low Carbon Technology Research and Development Program (ALCA) from the Japan Science and Technology Agency (JST)
- Elements Strategy Initiative for Structural Materials (ESISM) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- JSPS KAKENHI [24246113, 25630304]
- Grants-in-Aid for Scientific Research [25630304] Funding Source: KAKEN
Effects of ternary additions on the microstructure and thermal stability of directionally-solidified MoSi2/Mo5Si3 eutectic composites have been studied for twelve different elements (Ti, V, Cr, Fe, Co, Ni, Nb, Ta, W, Ir, B and C) paying special attention to the variation of lattice misfits and interface segregation behavior with ternary additions. Among six elements (type-1: Ti, V, Cr, Nb, Ta and W) with a relatively high solubility in MoSi2 and Mo5Si3, Ta and Ware found to be beneficial to microstructure refinement. All other six ternary elements (type-2: Fe, Co, Ni, Ir, B and C) with a negligibly low solubility in MoSi2 and Mo5Si3 exhibit a strong tendency to segregate on MoSi2/Mo5Si3 interfaces, resulting in both microstructure refinement and the modification of the interface morphology. (C) 2014 Elsevier Ltd. All rights reserved.
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