나노 준결정상으로 강화된 Ti계 벌크 비정질기지 복합재의 제조 및 기계적 특성 고찰

박진만; 임가람; 김태응; 손성우; 김도향

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자료유형: 학술저널

저자정보: 박진만 (준결정재료연구단/연세대학교 금속시스템공학과) 임가람 (준결정재료연구단/연세대학교 금속시스템공학과) 김태응 (준결정재료연구단/연세대학교 금속시스템공학과) 손성우 (준결정재료연구단/연세대학교 금속시스템공학과) 김도향 (Leibniz Institute for Solid State and Materials Research Dresden, Institute for Complex Materials)

저널정보: 한국주조공학회 한국주조공학회지 (주조) 한국주조공학회지 제28권 제6호

발행연도: 2008.1

수록면: 261 - 267 (7page)

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연구결과

초록· 키워드

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In-situ quasicrystalline icosahedral (I) phase reinforced Ti-based bulk metallic glass (BMG) matrix composites have been successfully fabricated by using two distinct thermal histories for BMG forming alloy. The BMG composite containing micron-scale Iphase has been introduced by controlling cooling rate during solidification, whereas nano-scale I-phase reinforced BMG composite has been produced by partial crystallization of BMG. For mechanical properties, micron-scale I-phase distributed BMG composite exhibited lower strength and plasticity compared to the monolithic BMG. On the other hand, nano-scale icosahedral phase embedded BMG composite showed enhanced strength and plasticity. These improved mechanical properties were attributed to the multiplication of shear bands and blocking of the shear band propagation in terms of isolation and homogeneous distribution of nanosize icosahdral phases in the glassy matrix, followed by stabilizing the mechanical and deformation instabilities.

#Icosahedral phase #Bulk metallic glass matrix composite #Strength #Plasticity #Shear band #Crystallization

참고문헌 (34)

참고문헌 신청

A.L. Greer / 1995 / Metallic glasses / Science 267:1947~1953

A.P. Tsai / 1987 / Stable quasicrystal in Al-Cu-Fe system / Jpn. J. of Applied Physics 26:1505~1507

W.L. Johnson / 1999 / Bulk glass forming-metallic alloys / MRS Bull 24:42~56

J.F. Löffler / 2003 / Bulk metallic glasses / Intermetallics 11:529~540

A. Inoue / 2000 / Stabilization of metallic supercooled liquid and bulk amorphous alloys / Acta Mater 48:279~306

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