Study on the Spraying Parameters of a Plasma-sprayed Hydroxyapatite Coating

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J. Korean Ceram. Soc. > Volume 36(4); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(4): 444.

플라즈마 용사법에 의한 Hydroxyapatite 코팅의 용사조건에 관한 연구

여인웅, 안효석

한국과학기술원 트라이볼로지연구센터

Study on the Spraying Parameters of a Plasma-sprayed Hydroxyapatite Coating

ABSTRACT

Hydroxyapatite(HA) was spray-coated to alloy substrate(Ti-6Al-4V) using plasma-spray process for bioceramic application The coating morphology composition and crystallinity were influenced by following process parameters ; stand-off distance spray power level and auxiliary gas pressure. These parameters have been systematically varied in the present study to evaluate their relative influence on the coating qual-ity and to seek an optimum spraying condition. Amorphicity and decomposition of HA increased with stand-off distance and the imperfect coating layer was obtained at the short stant-off distance (55mm). The cry-stallinity of HA coating decreased with spray power level and auxiliary gas pressure but the bond strength between the HA coated layer and Ti alloy substrate increased with the spray power level.

Key words: Hydroxyapatite(HA), Plasma-spray, Spraying condition