電解液中鈣磷組分對鎂合金MAO生物陶瓷膜層特性的影響
[Abstract]:The microarc oxidized bioceramic films were prepared on the surface of AZ31 magnesium alloys by changing the concentration of calcium acetate, sodium hexametaphosphate and sodium dihydrogen phosphate in the electrolyte by single variable experiment in constant current mode. The microstructure of the coatings was observed and analyzed. The surface Ca/P ratio and corrosion resistance of the film were measured. The effects of calcium and phosphorus components and their concentration on the structure and properties of the film were discussed. The electrolyte was optimized and the properties of the optimized film were observed and analyzed. The results showed that calcium acetate, sodium hexametaphosphate and sodium dihydrogen phosphate had a decisive effect on the content of Ca,P and the ratio of Ca/P, the higher the concentration of calcium acetate was, the smaller the thickness of the film was, but the better the uniformity was. The concentration of sodium hexametaphosphate had little effect on the surface morphology and thickness of the film. The higher the concentration of sodium hexametaphosphate was, the higher the content of P in the film was, and the higher the concentration of sodium dihydrogen phosphate was, the smaller the ratio of Ca/P was. After the electrolyte was optimized, the film was smooth and compact, and the surface of the film was evenly distributed about 10.7 渭 m of micropores, but there were microcracks. The hardness and corrosion resistance of the coating are mainly composed of MgO,Mg and a small amount of Ca2P2O7,SiO2. The roughness of the coating is Ra=0.45 渭 m and the wetting angle is 42.65 擄, which is beneficial to cell adhesion and growth.
【作者單位】: 江蘇科技大學(xué);
【基金】:江蘇高校優(yōu)勢學(xué)科建設(shè)工程資助項目(蘇政辦[2011]6) 江蘇省先進焊接技術(shù)重點實驗室資助項目(JSAWT-11) 江蘇省高校研究生科研創(chuàng)新計劃資助項目(2014-1081)
【分類號】:TG174.4
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