탄화 규소가 균일 분산된 규화 몰리브데넘계 복합재의 제조Fabrication of Molybdenum Silicide-based Composites with Uniformly Dispersed Silicon Carbide
- Other Titles
- Fabrication of Molybdenum Silicide-based Composites with Uniformly Dispersed Silicon Carbide
- Authors
- 최원준; 박천웅; 김영도; 변종민
- Issue Date
- Oct-2018
- Publisher
- 한국분말야금학회
- Keywords
- Molybdenum silicide; Silicon carbide; Composite; Voronoi diagram; Pressureless sintering
- Citation
- 한국분말야금학회지, v.25, no.5, pp.402 - 407
- Indexed
- KCI
- Journal Title
- 한국분말야금학회지
- Volume
- 25
- Number
- 5
- Start Page
- 402
- End Page
- 407
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16016
- DOI
- 10.4150/KPMI.2018.25.5.402
- ISSN
- 1225-7591
- Abstract
- Molybdenum silicide has gained interest for high temperature structural applications. However, poor fracture toughness at room temperatures and low creep resistance at elevated temperatures have hindered its practical applications. This study uses a novel powder metallurgical approach applied to uniformly mixed molybdenum silicidebased composites with silicon carbide. The degree of powder mixing with different ball milling time is also demonstrated by Voronoi diagrams. Core-shell composite powder with Mo nanoparticles as the shell and β-SiC as the core is prepared via chemical vapor transport. Using this prepared core-shell composite powder, the molybdenum silicide-based composites with uniformly dispersed β-SiC are fabricated using pressureless sintering. The relative density of the specimens sintered at 1500oC for 10 h is 97.1%, which is similar to pressure sintering owing to improved sinterability using Mo nanoparticles.
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