Microstructure at/around Interface between Plasma-Sprayed Hydroxyapatite and Ti Alloy

Sengo Kobayashi; Kotaro Kitashita; Kiyomichi Nakai; Noriyuki Kuwano

doi:10.4028/www.scientific.net/MSF.449-452.1281

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Wear and Bioconductivity Characteristics of Oxidized Ti-29Nb-13Ta-4.6Zr
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Microstructure at/around Interface between Plasma-Sprayed Hydroxyapatite and Ti Alloy
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Reciprocal Tribocontact of Biomedical Alloys
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Synthesis of Apatite Ceramics with Preferential Crystal Orientation
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Nanostructured WC-Co Coatings from Different Feedstock Powders
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HomeMaterials Science ForumMaterials Science Forum Vols. 449-452Microstructure at/around Interface between...

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.

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Periodical:

Materials Science Forum (Volumes 449-452)

Pages:

1281-1284

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.1281

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Online since:

March 2004

Authors:

Sengo Kobayashi, Kotaro Kitashita, Kiyomichi Nakai, Noriyuki Kuwano

Keywords:

Crystallography, Hydroxyapatite (HAP), Interface, Miniaturization of Grain, TEM, TiAl

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