EFFECTS OF SANDBLASTING CONDITIONS IN PREPARATION OF BIOACTIVE STAINLESS STEELS BY THE FUNCTION OF APATITE NUCLEI

Abstract

: We formed many micropores on the surfaces of stainless steel (SUS) substrates by sandblasting method using alumina particles with 14 μm or 3 μm for average particle size and apatite nucleus (AN) treatment was operated. By these treatments, we provided bioactivity to the SUS substrates. We evaluated apatite-forming ability of the SUS substrate by soaking in a simulated body fluid. Apatite formation was induced on the surface of the substrate within 1 day. High adhesive strength of apatite layer was achieved by a mechanical interlocking effect between the apatite layer and the substrate. The adhesive strength was related to the size of the grinding particles in the sandblasting process.