Paper Title:
Microstructure at/around Interface between Plasma-Sprayed Hydroxyapatite and Ti Alloy
  Abstract

Microstructures of the interface between plasma-spray coated hydroxyapatite (HAp) and Ti-alloy substrate have been investigated mainly by means of transmission electron microscopy. The results obtained are as follows; HAp coating exhibits a high crystallinity. The interface of HAp/Ti-alloy is winding at an interval of about 100µm and thickness of HAp coating is about 50µm. Al2O3 abrasives remained in both HAp coating and Ti-alloy substrate around the interface. Amorphous phase was not observed at the interface. The grain size of Ti-alloy in the vicinity of the interface is about 10 to 100nm in diameter, while that far from the interface is about 3µm in diameter. Miniaturization of Ti-alloy grain around the interface was occurred by plasma spraying. There is no specific crystallographical orientation relationship between HAp and Ti-alloy at the interface, indicating bonding of the interface is essentially mechanical one such as an anchor effect.

  Info
Periodical
Materials Science Forum (Volumes 449-452)
Edited by
S.-G. Kang and T. Kobayashi
Pages
1281-1284
DOI
10.4028/www.scientific.net/MSF.449-452.1281
Citation
S. Kobayashi, K. Kitashita, K. Nakai, N. Kuwano, "Microstructure at/around Interface between Plasma-Sprayed Hydroxyapatite and Ti Alloy", Materials Science Forum, Vols. 449-452, pp. 1281-1284, 2004
Online since
March 2004
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