Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지

Microstructure and Mechanical Properties of $Ti_3Al-Nb$ Alloys and TiB(Ti-25Al-11Nb) Metal Matrix Composite Fabricated by Spark Plasma Sintering Process

방전플라즈마 소결법으로 제작된 $Ti_3Al-Nb$ 합금 및 TiB/(Ti-25Al-11Nb) 금속기 복합재료의 미세조직과 기계적 성질

  • 이성열 (한국해양대학교 기계소재공학부)
  • Published : 2003.01.01
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Abstract

Ti-25Al-xNb (x=0, 3, 7, 11, 13 at. %) alloys and 18 vol. % TiB/(Ti-25Al-11Nb) metal matrix composite were fabricated by spark plasma sintering process at 900-120$0^{\circ}C$. Microstructural characteristics of the sintered bodies were identified by SEM, EDX analysis, X-ray diffraction, and differential scanning calorimeterric method. $Ti_3Al$ alloy was consisted of equiaxed $\alpha_2$ phase. $Ti_3Al-Nb$ alloys and the matix of TiB/(Ti-25Al-11Nb) metal matrix composite had the morphology that O phase was precipitated at the grain boundary of $\alpha_2$phase. Volume fraction of O phase and hardness were depended on the concentration of Nb in $Ti_3Al-Nb$ alloy, Rule of mixing could be applied to hardness and Young's modulus of 18 vol. % TiB/(Ti-25Al-11Nb) metal matrix composite.

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