622 リン酸カルシウム結晶化ガラスコーティングとチタン合金基板界面の反応層形成挙動

概要

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A fine, strong coating consisting of a bioactive calcium phosphate invert glass-ceramic can be prepared easily by reaction of the glassy phase with an oxide layer formed on a new β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr, when the metal, on which the mother glass powders with a composition of 60CaO-30P_2O_5-7Na_2O-7Na_2O-3TiO-2 in mol% are placed, is heated at 800℃ in air. A compositionally gradient layer is developed on the titanium alloy during the heating. Tensile bonding strength of the coating to the metal is extremely higher than those to conventional metals such as Ti-6Al-4V alloy or pure titanium. The oxidized layer on Ti-29Nb-13Ta-4.6Zr alloy is relatively smaller in thickness than that on Ti-6Al-4V alloy even by the heat-treatment in air; large tensile stresses are not generated in the layer.
社団法人日本機械学会の論文
2002-08-24