Microstructure of titanium component in hydroxyapatite-Ti asymmetrical functionally graded biomaterial

来源期刊：中国有色金属学报(英文版)2004年第1期

论文作者：储成林 林萍华 董寅生 朱景川 尹钟大

文章页码：25 - 28

Key words：functionally graded biomaterial; microstructure; hydroxyapatite; titanium

Abstract: The microstructure of the titanium component in hydroxyapatite (HA)-Ti asymmetrical functionally graded biomaterial (FGM) fabricated by powder metallurgical process was investigated. It is found that the main substructure of the Ti component in the FGM consists of screw dislocations whose Burgers vectors are 1/3〈1120〉and there are not deformation twins. Screw dislocations are straight and regularly distributed, and cross slip can be observed. The density of the dislocations in the Ti component increases with the rise of the content of the HA component in the FGM. The subgrain boundaries of the Ti component consist of dislocation network walls. Some microbands with bamboo-leaf-shape distribute regularly in Ti grains, which exhibit a specific orientation relationship withα-Ti parent phase.