PURPOSE: To increase the adhesive property between a cover layer and a core member by making a porous ceramics into a core member, and forming a complex in-plant member by connecting a ceramics cover layer which consists of hydroxyapatite or tricalcium phosphate to the surface of the core member.
CONSTITUTION: After a polysilazane formation body is baked to form a porous ceramics core member of silicon nitride, a coating material which consists of hydroxyapatite or calcium phosphate is spread on the surface of the core member to obtain a complex in-plant member. In order to form the core member, the above polysilazane mixing a combustible agent and/or a foaming agent is used as a moulding material, and after making it into a necessary form of mould, it is baked up. The coating material is manufactured by dispersing the powder of HAP or the power of TCP together with a binder in the water or in an organic solvent. In this case, the particle diameter of the HAP powder or the TCP powder is made less than 10μm, favorably 2 to 7μm.
SUZUKI SUNAO
FUNAYAMA TORU
ISODA TAKESHI
