Nb-T2 합금의 파쇄분말을 사용한 Nb-Si-B계 합금의 제조
Fabrication of Nb-Si-B Alloys Using the Pulverized Nb-T2 Alloy Powder
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Nb-Si-B alloys with Nb-rich compositions are fabricated by spark plasma sintering for high-temperature structural applications. Three compositions are selected: 75 at% Nb (Nb0.7), 82 at% Nb (Nb1.5), and 88 at% Nb (Nb3), the atomic ratio of Si to B being 2. The microstructures of the prepared alloys are composed of Nb and T2 phases. The T2 phase is an intermetallic compound with a stoichiometry of Nb5Si3-xBx (0 ≤ x ≤ 2). In some previous studies, Nb-Si- B alloys have been prepared by spark plasma sintering (SPS) using Nb and T2 powders (SPS 1). In the present work, the same alloys are prepared by the SPS process (SPS 2) using Nb powders and hypereutectic alloy powders with composition 67at%Nb-22at%Si-11at%B (Nb67). The Nb67 alloy powders comprise T2 and eutectic (T2 + Nb) phases. The microstructures and hardness of the samples prepared in the present work have been compared with those previously reported; the samples prepared in this study exhibit finer and more uniform microstructures and higher hardness.
Abstract
Nb-Si-B alloys with Nb-rich compositions are fabricated by spark plasma sintering for high-temperature structural applications. Three compositions are selected: 75 at% Nb (Nb0.7), 82 at% Nb (Nb1.5), and 88 at% Nb (Nb3), the atomic ratio of Si to B being 2. The microstructures of the prepared alloys are composed of Nb and T2 phases. The T2 phase is an intermetallic compound with a stoichiometry of Nb5Si3-xBx (0 ≤ x ≤ 2). In some previous studies, Nb-Si- B alloys have been prepared by spark plasma sintering (SPS) using Nb and T2 powders (SPS 1). In the present work, the same alloys are prepared by the SPS process (SPS 2) using Nb powders and hypereutectic alloy powders with composition 67at%Nb-22at%Si-11at%B (Nb67). The Nb67 alloy powders comprise T2 and eutectic (T2 + Nb) phases. The microstructures and hardness of the samples prepared in the present work have been compared with those previously reported; the samples prepared in this study exhibit finer and more uniform microstructures and higher hardness.
참고문헌 (9)
- B. P. Bewlay, , Metal. Mater. Trans. A, 34, pp.2043~ (2003)
- V. Behrani, , Intermetallics, 14, pp.24~ (2006)
- T. Murakami, , Intermetallics, 7, pp.1043~ (1999)
- Z. Li, , Mater. Lett, 62, pp.2229~ (2008)
- R. Sakidja, , Acta Mater, 56, pp.5223~ (2008)
- Y. Liu, "Processing and Fabrication of Advanced Materials-XI", pp.258~ (2003), ASM International
- 주수현, "Nb-Si-B계에서 Nb+T2 공존 영역의 미세조직 특성", 대한금속·재료학회지, 53(1), pp.43~50 (2015), 대한금속·재료학회[DOI]
- 김상환, "방전 플라즈마 소결(Spark Plasma Sintering) 방법에 의해 제조된 Nb-Si-B계 합금의 미세조직 특성", 한국분말재료학회지, 22(6), pp.426~431 (2015), 한국분말재료학회
- C. A. Nunes, , J. Phase Equilib. Diffus, 32, pp.92~ (2011)