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Microstructure control of Mo-Si-B alloy for formation of continuous alpha-Mo phase

Title
Microstructure control of Mo-Si-B alloy for formation of continuous alpha-Mo phase
Author
김영도
Keywords
Mo-Si-B alloys; Superalloys; Core-shell intermetallic powder; Pressureless sintering
Issue Date
2015-11
Publisher
ELSEVIER SCI LTD
Citation
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, v. 53, NO Special SI, Page. 61-65
Abstract
The Mo-Si-B alloy has been in the spotlight as a promising alternative to Ni-based superalloys due to its superior thermal resistance and mechanical properties. In particular, the mechanical properties of the Mo-Si-B alloy are sensitively influenced by the mutual distribution of the ductile alpha-Mo phase and brittle intermetallic compound phases such as Mo5SiB2 (T2) and Mo3Si (A15). For the Mo-Si-B alloy to possess an excellent fracture toughness, ductile alpha-Mo phase should form a continuous phase with the uniformly distributed intermetallic compound phases. In this study, a core-shell intermetallic powder composed of nano-sized alpha-Mo particles surrounding intermetallic compound particles was fabricated using Mo-Si-B intermetallic compound powders prepared through the mechano-chemical method and the chemical vapor transport (CVT) process of Mo oxide powder. Also, the Mo-Si-B alloy, which has a continuous alpha-Mo phase uniformly embedded by intermetallic compound phases, was fabricated by the pressureless sintering of the core-shell intermetallic powder. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0263436815000566?via%3Dihubhttp://hdl.handle.net/20.500.11754/28813
ISSN
0263-4368
DOI
10.1016/j.ijrmhm.2015.03.006
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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