氩离子辅助沉积的羟基聚磷酸钙钠膜的结构与溶解特性  

Structure and dissolubility of calcium sodium hydroxypolyphosphate film prepared by argon ion beam assisted deposition

作　　者：王培录[1] 刘仲阳[1] 廖小东[1] 郑思孝[1] 孙官清[1] 王昌祥[2] 陈治清[2] 

机构地区：[1]四川大学原子核科学技术研究所辐射技术及应用教育部重点实验室,成都610064 [2]四川大学华西口腔学院牙材料系,成都610041

出　　处：《核技术》2003年第9期713-717,共5页Nuclear Techniques

基　　金：中国科学院上海微系统与信息技术研究所开放实验室课题(9903)资助

摘　　要：用60keV的Ar离子束辅助将羟基聚磷酸钙钠材料沉积于Ti合金表面,通过X射线衍射谱(XRD)、付里叶变换红外谱(FTIR)和X射线光电子能谱(XPS)对沉积膜进行表征,发现膜呈非晶或无明显的结晶度,膜层元素与基体材料Ti相互扩散明显,沉积中出现C和O污染,膜中引入了CO_3^(2-)根基团。膜的Ca-P比随辅助离子剂量的增高而降低,而在盐溶液中的耐溶解性则随辅助剂量的增加而增强。实验中还发现,这种Ar离子辅助沉积的膜,在Hanks溶液中的电化学特性退火前后表现出明显的差异:退火前,膜一直呈现较高的钝性。当电极电位从0升至1500mV时,反映溶解特性的极化电流仅从1μA增至2μA,而在氩气氛中退火后,当电极电位≤200mV时,极化电流极低(<0.5μA),耐溶性明显优于前者;当电位在400—800mV之间时与退火前相差不大。但当电极电位>800mV时,其电化学特性很快变坏,极化电流迅速增大,溶解率猛增。A thin calcium sodium hydroxypolyphosphate film on titanium alloy substrate was deposited by an argon ion beam with 60keV energy. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIRS) and X-ray photoelectron spectroscopy (XPS) were used to characterize the as-deposited film. These analyses revealed that the as-deposited film was amorphous or no apparent crystallinity and each other diffusion between film and substrate was quite obvious. Contaminations from carbon and oxygen appeared during the deposition process. At the same time, a CO32- group was introduced into the as-deposited film. Ca-P ratio in the film was decreased with the increase of the assisting ion dose and the dissolubility resistance in the salt solution was increased with the increase of the assisting dose. In the experiment, we observed also that the electrochemical properties of the films in the Hanks solution exhibited an obvious difference before and after annealing. The film presented a high passivity all the time before the annealing, a polarization current expressing dissolubility increased only from 1 μA to 2μA when an electrode potential went up from 0 to 1500mV, while after annealing in an argon atmosphere at 600℃, polarization current was quite small (<0.5μA), the dissolubility resistance was obviously superior to the former when the electrode potential ≤ 200mV. Its dissolubility was almost the same as that before annealing, however, when the potential was between 400mV and 800mV. When the electrode potential >800mV, the electrochemical properties became quickly poor and the polarization current was rapidly increased.

关 键 词：羟基聚磷酸钙钠 离子束辅助沉积 溶解性 电化学行为 

分 类 号：TL99[核科学技术—核技术及应用] O484.4[理学—固体物理]