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鎂合金表面等離子噴涂鈣/磷涂層在SBF中的降解行為研究
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國家自然科學(xué)基金 (51072057，50902052，50872035)


Degradation of Calcium/Phosphorus Coating Plasma Sprayed on Magnesium Alloy in SBF Solution
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    摘要:

    采用大氣等離子噴涂在鎂合金AZ31B表面制備了可降解鈣/磷涂層。利用XRD、SEM、EDS分析了涂層的相組成、結(jié)晶度及在人體模擬液(SBF)中浸泡前后的顯微形貌和元素組成，根據(jù)pH值和降解速率研究了涂層的體外降解性能。研究表明：鈣/磷涂層與鎂合金基體緊密結(jié)合，致密度高，涂層由較難降解的HA相和較易降解的Ca3(PO4)2、Ca4P2O9和CaO組成，涂層中HA結(jié)晶度為49.3%。生物降解性能研究顯示，鈣/磷涂層材料在SBF溶液中的pH值和降解速率均小于鎂合金基體，且較小的變化幅度使涂層材料的降解行為控制在穩(wěn)定范圍內(nèi)。

    Abstract:

    The biodegradable calcium/phosphate coating on the surface of the magnesium alloy AZ31B was prepared by atmospheric plasma spraying. The phase compositions and crystallinity of the coating were quantitative investigated by XRD, and the microscopic morphology and elemental composition of the coating before and after immersion in the simulated body fluid (SBF) were investigated by SEM and EDS. The degradability of magnesium alloy with calcium/phosphorus coating in SBF solution were studied according to the pH value and the degradation rate of the coating. The results show that the high density calcium/phosphate coating is closely integrated with the magnesium alloy substrate. The coating is composed of HA with difficult degradation and Ca3(PO4)2, Ca4P2O9 and CaO with easy degradation, and the crystallinity of HA in the coating is 49.3%. In addition, the study of biodegradation shows that the pH value and the degradation rate of the calcium/phosphorus coating in SBF are less than that of magnesium alloy, and the smaller change magnitude makes the coating material’s degradation be controlled in a stable range.

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郭遠(yuǎn)軍,寧成云,譚幗馨,黃閃閃,熊文名,朱 紅.鎂合金表面等離子噴涂鈣/磷涂層在SBF中的降解行為研究[J].稀有金屬材料與工程,2012,41(11):1995~1999.[Guo Yuanjun, Ning Chengyun, Tan Guoxin, Huang Shanshan, Xiong Wenming, Zhu Hong. Degradation of Calcium/Phosphorus Coating Plasma Sprayed on Magnesium Alloy in SBF Solution[J]. Rare Metal Materials and Engineering,2012,41(11):1995~1999.]
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  • 收稿日期:2011-11-29
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