| In the paper, microarc oxidation technique was adopted to fabricate calcium phosphate compound of hydroxyapatite analogue coating on titanium substrate. With the facility of microarc oxidation made by ourselves, the calcium phosphate compound was coated on titanium substrate. The analyzing to the coating turn out from the experimentation indicated that adopting microarc oxidation technique and by the sintering from the arc the calcium phosphate compound was coated on titanium substrate. The fabricated coating was the ceramic intermixture which was porous and firmly combined with the titanium substrate. The property of the coating was affected by the electroparameter and the direction of the electrolyte. Under optimal processing condition, phosphatic ammonia salt, for example, (NH4)H2PO4 etc. act as the phosphate and Ca3(PO4), CaCO3, (CH3COOH)Ca-H2O etc. act as calc-salt of the electrolyte. The calcium content of the coating was more when the (CH3COOH) Ca'H20 was elected than others did .The processing parameters , which affected the coating, was studied systematically. It was found the ingredient of the coating was mainly determined by the'direction of the electrolyte and so did the property of the coating by the electric current of microarc oxidation. The optimized parameters under optimal processing condition was work out in the paper after lots of experiments .Analyzing the coating with SEM and XRD, it was found the calcium phosphate compound in the coating fabricated through microarc oxidation can be biomedically activated.The principium of microarc oxidation technique adopted to fabricate biomedical calcium phosphate compound coating on titanium substrate was primarily explored in the paper, the conclusion was drown, that is, the reason that the corpuscule which contained calcium moving to anode can be interpreted by the theory of electrochemical deposition. The corpuscule was sintered with the titaniumsubstrate for the high temperature of the arc on the anode. |
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