Volume and size effects of intermetallic compounds on the high-temperature oxidation behavior of Mo-Si-B alloys
- Authors
- Choi, Won June; Park, Chun Woong; Park, Jung Hyo; Kim, Young Do; Byun, Jong Min
- Issue Date
- Jun-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Mo-Si-B alloy; High-temperature oxidation; Intermetallic compound; High-energy ball milling; Core-shell composite powder
- Citation
- INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, v.81, pp.94 - 99
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
- Volume
- 81
- Start Page
- 94
- End Page
- 99
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/13445
- DOI
- 10.1016/j.ijrmhm.2019.02.008
- ISSN
- 0263-4368
- Abstract
- In this study, we investigated the high-temperature oxidation behavior of Mo-Si-B alloys with different volume fractions or sizes of intermetallic compound phases. Mo-Si-B alloys with uniformly dispersed intermetallic compound phases (Mo5SIB2 and Mo3Si) in Mo solid solution matrix phase were fabricated using a novel powder metallurgical route, as introduced in our previous study. An isothermal oxidation test was conducted at 1300 degrees C for up to 10 h. The high-temperature oxidation resistance of Mo-Si-B alloys improved by increasing the volume fraction of intermetallic compound phases; this was a result of the increased amount of protective oxidized layers, which protect the Mo-ss phase from oxidation by covering the surface. In addition, Mo-Si-B alloy with smaller intermetallic compound phases pulverized by high-energy ball milling had better high-temperature oxidation resistance compared to Mo-Si-B alloy with as-synthesized intermetallic compound phases.
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