생체의학 임플란트재료로서 Ti-Nb계 합금의 조직과 기계적 성질에 미치는 HEMM의 영향

우기도; 최갑송; 이현범; 김인용; Deliang Zhang; Kee-Do Woo; Gab-Song Choi; Hyun-Bum Lee; In-Yong Kim; Deliang Zhang

Korean Journal of Materials Research, Vol.17, No.11, 587-592, November, 2007

DOI10.3740/MRSK.2007.17.11.587 Export Citation

생체의학 임플란트재료로서 Ti-Nb계 합금의 조직과 기계적 성질에 미치는 HEMM의 영향

The Effect of HEMM on Microstructure and Mechanical Properties of Ti-Nb Alloy for Implant Biomedical Materials

우기도, 최갑송^{1, †}, 이현범, 김인용, Deliang Zhang²

전북대학교 신소재공학부
¹동명대학교 기계공학부
²Waikato대학교 재료공정공학과

Kee-Do Woo, Gab-Song Choi^{1, †}, Hyun-Bum Lee, In-Yong Kim, and Deliang Zhang²

Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, Chonbuk National Universiry, Chonbuk, 561-756, Korea
¹Department of Mechanical Engineering, Engineering college, Dongmyong University, 535, Yongdang-dong, Namgu, Busan 608-711 Korea
²Material Science & Engineering, Waikato Institute of Technology, Korea

E-mail:

Al-42wt%Nb powder was prepared by high-energy mechanical milling(HEMM). The particle size, phase transformation and microstructure of the as-milled powder were investigated by particle size distribution (PSD) analyzer, scanning electron microscopy (SEM), X-ray diffractometery (XRD), transmission electron microscopy (TEM)and differential thermal analysis (DTA). The milled powders were heated to a sintering temperature at 1000C with under vaccum with vaccum tube furnace. Microstructural examination of sintered Ti-42wt%Nb alloy using 4h-milled powder showed Ti-rich phases (α-Ti) which are fine and homogeneously distributed in the matrix (Nb-rich phase: β-Ti). The sintered Ti-42wt%Nb alloy with milled powder showed higher hardness. The microstructure of the as quenched specimens fabricated by sintering using mixed and milled powder almost are same, but the hardness of as quenched specimen fabricated by using mixed powder increased due to solution hardening of Nb in Ti matrix. The aging effect of these specimens on microstructural change and hardening is not prominent.

Keywords:Powder metallurgy;Biomaterials;HEMM(high energy mechanical mill);Sintering;Ti-Nb alloy

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[10] Woo KD, Private, (Metal and Materials Inter., submitted)