상온 분사법에 의한 수산화아파타이트 코팅 지르코니아의 제조 및미세구조에 미치는 열처리 효과 = Research Fabrication of Hydroxyapatite-coated Zirconia by Room Temperature Spray Process and Microstructural Change by Heat-treatment

다국어 초록 (Multilingual Abstract)

Hydroxyapatite coatings were fabricated by a room temperature spray method on zirconia substrates and the influence of heat-treatment on their microstructure was also investigated. Phase composition of coated hydroxyapatite films was similar to the starting powder, but the grain size of hydroxyapatite particles was reduced to the size of nano-scale about 100 nm. Grain size, particle compactness, and adhesiveness to zirconia of hydroxyapatite coatings were increased with heat-treatment temperature, but some of cracks by heat-treatment above 1100℃ were initiated between hydroxyapatite coatings and zirconia substrate. Heat-treated hydroxyapatitelayers show the dissolution in SBF solution for 5 days. Hydroxyapatite-coated specimen heat-treated at 1100℃ for 1 h has a good biocompatibility, which specimen induced the nanocrystalline hydroxyapatite precipitateson the coating surface by the immersion in SBF solution for 5 days. (Received December 26, 2014; Revised December 31,2014: Accepted JANUARY 6, 2015)

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