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鈦基Ca-P涂層相組成的定量分析及降解性能研究
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國家自然科學(xué)基金(50872035，51072057)；教育部“新世紀(jì)優(yōu)秀人才”基金(教技函[2006]6號)


Characteristics of Crystal Structure and Biodegradablity of
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    摘要:

    采用大氣等離子噴涂技術(shù)，在純鈦表面噴涂制備鈣磷 (Ca-P) 涂層，分析兩種噴涂工藝下形成的兩種特殊形貌晶體的顯微結(jié)構(gòu)和元素組成，利用XRD定量分析涂層的相組成及結(jié)晶度，并在人體模擬液 (SBF) 中對涂層的降解性能進(jìn)行研究。結(jié)果表明：在噴涂功率為22 kW、噴槍移動速率為400 mm/s時涂層表面形成大量方棱狀的焦磷酸鈣 (Ca2P2O7) 晶體，結(jié)晶度為4.61%，而在噴涂功率為26 kW、噴涂距離為300 mm/s時則形成大量花瓣狀的磷酸四鈣 (Ca4P2O9) 晶體，結(jié)晶度為6.02%，噴涂粉體粒度較小使得兩種涂層中HA結(jié)晶度都較?。簧锝到庑阅苎芯匡@示，兩涂層降解反應(yīng)都是由劇烈到平緩的過程，但含Ca2P2O7晶體涂層的降解速率小于含Ca4P2O9晶體的涂層

    Abstract:

    Two calcium and phosphate (Ca-P) coatings with special topographies were prepared on the pure titanium substrates by air plasma spraying. The microstructures and composition of the two special crystals were analyzed by SEM and EPMA. The phase compositions and crystallinty of coatings were quantitatively investigated by XRD. The results show that a lot of square prismatic-like dicalcium phosphates (Ca2P2O7) crystals with 4.61% crystallinity were formed under 22 kW spraying power and 400 mm/s rate of gun movement; and a large number of petal-like tetracalcium phosphate (Ca4P2O9) crystals with 6.02% crystallinity were formed under 26 kW spraying power and 300 mm/s rate of gun movement. As a result of the small particle size of the spaying powder, the HA has a low degree of crystallinity in both two coatings. In addition, the study of biodegradation shows that the processes of degradation of the two coatings proceed from fiercely to gently, but the degradation rate of the former is lower than that of the latter.

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郭遠(yuǎn)軍,寧成云,譚幗馨,熊文名,李 丹,黃閃閃,葛永梅,鄭華德.鈦基Ca-P涂層相組成的定量分析及降解性能研究[J].稀有金屬材料與工程,2012,41(8):1447~1551.[Guo Yuanjun, Ning Chengyun, Tan Guoxin, Xiong Wenming, Li Dan, Huang Shanshan, Ge Yongmei, Zheng Huade. Characteristics of Crystal Structure and Biodegradablity of[J]. Rare Metal Materials and Engineering,2012,41(8):1447~1551.]
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  • 收稿日期:2011-08-05
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