Microstructure and Mechanical Strength of Hardened Paste of Hydroxyapatite Cement Containing Whisker Phase

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J. Korean Ceram. Soc. > Volume 36(12); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(12): 1342.

휘스커상을 함유한 수산화아파타이트시멘트 경화체의 미구조-강도 특성

손영도, 송태웅

경남대학교 신소재공학부

Microstructure and Mechanical Strength of Hardened Paste of Hydroxyapatite Cement Containing Whisker Phase

ABSTRACT

In order to improve the density and the mechanical strength without change in chemical composition the hardened pastes of hydroxyapatite cement were reinforced with powders and/or whiskers of hydroxyapatite. The powders behaved as a seed of hydroxyapatite formation rather than a filler while the whiskers were mrerly dispersed in matrix and capillary pores of the hardened bodies leading to increase in mechanical strength. But the increase in strength But the increase in strength was nnt enough owing to the lack of homogeneous dispersion of the fibers. The highest diametral tensile strength of 18.5 MPa was measured at the hardened hydroxyapatite body in which well-dispersed whisker phase formed uniformly during hydro-thermal curing of power-added and dry-formed hydroxyapatite cement.

Key words: Biocement, Hydroxyapatite cement, Calcium phosphate cement, Hydroxyapatite whisker