中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 3 March 2012 |
biocomposite fabricated by powder metallurgy and sintering
KONG Fan-tao1, 2, LIU Zhi-guang1, 2
（1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2. National Key Laboratory for Precision Hot Processing of Metals,
Harbin Institute of Technology, Harbin 150001, China;
3. Division of Advanced Material Engineering and Research Center of Advanced Materials Technology,
Chonbuk National University, Chonbuk 561-756, Korea）
Abstract:A new β-Ti based Ti35Nb2.5Sn/10 hydroxyapitite (HA) biocompatible composite was fabricated by mechanical milling and pulsed current activated sintering(PCAS). The microstructures of Ti35Nb2.5Sn/10HA powder particles and composites sintered from the milled powders were studied. Results indicated that α-Ti phase began to transform into β-Ti phase after the powders were mechanically milled for 8 h. After mechanical milling for 12 h, α-Ti completely transformed into β-Ti phase, and the ultra fine Ti35Nb2.5Sn/10HA composite powders were obtained. And ultra fine grain sized Ti35Nb2.5Sn/10HA sintered composites were obtained by PCAS. The hardness and relative density of the sintered composites both increased with increasing the ball milling time.
Key words: Ti35Nb2.5Sn/10HA; ultrafine grain; powder metallurgy; milling time
