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Electrophoretic coating of multilayered apatite composite on alumina ceramics

✍ Scribed by Yamashita, Kimihiro ;Yonehara, Eiko ;Ding, Xufeng ;Nagai, Masaharu ;Umegaki, Takao ;Matsuda, Motohide

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
397 KB
Volume
43
Category
Article
ISSN
0021-9304

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✦ Synopsis

By means of an electrophoretic deposition technique followed by sintering, alumina and zirconia ceramics were coated with apatitic composites composed of porous surface and intermediate layers of hydroxyapatite and an adhesive calcium phosphate layer. The electrophoretic deposition of these layers was attained by the use of a mixed solvent of acetylacetone and alcohol as well as the mixed powders of the calcium phosphates and alumina. The adhesive layer was formed by the codeposition of calcium phosphate glass powders (Ca/P Å 1 2 ) with hydroxyapatite, while the open porosity of the surface layer was increased with the addition of alumina to the hydroxyapatite layers. The resultant phases of sintered composite layers were tricalcium phosphate and alumina with a small amount of hydroxyapatite.

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