活性陶瓷層鈣磷成分的影響
(西安理工大學(xué) 材料科學(xué)與工程學(xué)院，西安 710048)
摘 要: 采用自行研制的微弧氧化設(shè)備于(CH3COO)2Ca-CaC3H5(OH)2PO4溶液中制備了富含Ca、 P成分的鈦合金微弧氧化陶瓷層， 研究了電壓、 電流密度、 占空比等電參數(shù)對(duì)陶瓷層中Ca、 P成分的影響及Ca、 P在膜層中的分布。 結(jié)果表明： 隨著電壓或電流密度的升高， 膜層中Ca、 P相對(duì)含量增大， 但Ca的增長(zhǎng)速度遠(yuǎn)快于P， 使得Ca、 P的摩爾比隨電壓或電流密度的升高而增大；而占空比對(duì)膜層中Ca、 P成分影響略有不同， 隨著占空比的增大， P相對(duì)含量先減少， 而后很快趨于平緩， Ca相對(duì)含量和Ca、 P摩爾比則呈上升趨勢(shì)； 沿膜層由表及里， Ca元素在膜層的含量分布呈現(xiàn)類似二次曲線遞減趨勢(shì)， P膜層中含量則大體均勻, 但在膜基交界面迅速降為零。
關(guān)鍵字: 鈦合金； 電參數(shù)； 微弧氧化； 鈣； 磷
phosphorus component of bioactivity micro-arc
oxidation coatings on titanium alloy
（ School of Materials Science and Engineering,
Xi'an University of Technology, Xi'an 710048, China）
Abstract: Ceramic oxide coatings containing calcium and phosphorous were formed on titanium alloy in (CH3COO)2Ca-CaC3H5(OH)2PO4 solution by micro-arc oxidation. The effects of electric parameters including voltage, current density and duty cycle on calcium, phosphorous component and distribution of the coatings were studied. The results show that calcium and phosphorous comparative contents increase with voltage or current density increasing, but calcium increases more quickly than phosphorous, and the mole ratio of Ca and P increases with the voltage or current density increasing. The effects of duty cycle on the calcium and phosphorous component are slightly different. With duty cycle increasing, the phosphorous comparative contents decrease firstly, then tend to stable, while calcium comparative content and mole ratio of Ca and P increase. From the surface to inner, calcium content decreases gradually in a similar trend of conic and the phosphorous content remains generally uniform in the coating, but decreases quickly to zero in the coating-substrate interface.
Key words: titanium alloy; electric parameter; micro-arc oxidation; calcium; phosphorous
