MORPHOLOGIC VARIATION IN PLASMA-SPRAYED HYDROXYAPATITE-BIOACTIVE GLASS COMPOSITE COATINGS IN HANKS SOLUTION
MORPHOLOGIC VARIATION IN PLASMA-SPRAYED HYDROXYAPATITE-BIOACTIVE GLASS COMPOSITE COATINGS IN HANKS SOLUTION
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DOI：
10.1002/jbm.820280609
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发表时间：
1994-06-01
期刊：
影响因子：
--
通讯作者：
JU, CP
中科院分区：
文献类型：
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作者：
LIN, JHC;LIU, ML;JU, CP
采用等离子喷涂技术在商用Ti6 A14 V基体上制备了纯羟基磷灰石（HA）、纯生物活性玻璃（BG）和一系列新型（HA/BG）复合涂层。利用XRD和SEM研究了涂层在Hank’s生理溶液中浸泡后的形貌和物相变化。结果表明，喷涂BG涂层具有基本上是非晶结构，具有非常粗糙的表面。浸泡7天后，BG表面开始溶解，磷灰石的弱XRD峰开始出现。在喷涂的纯HA表面上发现少量的CaO、β-TCP、Ca 4P 2 O 5以及玻璃状膜，其中大部分在7天内溶解。纯HA中磷灰石的XRD强度随浸泡时间缓慢增加，直到第10天，强度开始下降，10天后，强度再次上升。在HA/BG复合涂层中观察到的这种未被发现的“下降和上升”现象甚至更引人注目。HA的存在加速了生物活性玻璃的溶解。(C)John Wiley & Sons，Inc.
Pure hydroxyapatite (HA), pure bioactive glass (BG), and a new series of (HA/BG) composite coatings were plasma-sprayed onto a commercial Ti6A14V substrate. Changes in morphology and phases of these coatings after immersion in Hank's physiologic solution were investigated using XRD and SEM. Results indicated that the as-sprayed BG coating has an essentially amorphous structure with a very rough surface. After 7 days of immersion, the BG surface started to dissolve, and weak XRD peaks of apatite started to develop. Small amounts of CaO, beta-TCP, Ca4P2O5, as well as a glassy film, were found on the as-sprayed pure HA surface, most of which dissolved in 7 days. The XRD intensity of apatite in pure HA slowly increased with immersion time until, on the 10th day, the intensity started to drop, and 10 days later, the intensity rose again. This undiscovered ''drop and rise'' phenomenon was observed for the HA/BG composite coatings in an even more dramatic way. The presence of HA accelerates the dissolution of bioactive glass. (C) 1994 John Wiley & Sons, Inc.