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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Microstructural and in vitro chemical investigations into plasma-sprayed bioceramic coatings.
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Microstructural and in vitro chemical investigations into plasma-sprayed bioceramic coatings.

机译:等离子体喷涂生物陶瓷涂层的微观结构和体外化学研究。

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摘要

Hydroxyapatite (HA) coatings plasma sprayed without and with bond coats (titania, zirconia) onto titanium alloy (Ti6A14V) substrates under both atmospheric and low pressure plasma spray conditions were investigated in terms of their microstructure and their resorption resistance during immersion in simulated body fluid (Hank's balanced salt solution). The microstructures of test samples were characterized using SEM on as-sprayed and leached surfaces and on the corresponding cross sections. Selected coating systems were studied by 2-dimensional secondary ion mass spectroscopy imaging to obtain information on plasma spray induced diffusional processes at the coating interfaces, as well as the spatial distribution of minor and trace elements. Coatings consisting of thin (10-15 microm) titania/zirconia (eutectic ratio) and titania bond coats, combined with a 150- to 180-microm thick HA top coat, yielded peel strengths in excess of 32 N/m, as well as sufficient resorption resistance.
机译:研究了在大气压和低压等离子喷涂条件下等离子喷涂钛合金(Ti6A14V)上有无和有粘结层(二氧化钛,氧化锆)的羟基磷灰石(HA)涂层的微观结构和在浸入模拟体液中的吸收阻力(汉克的平衡盐溶液)。使用SEM在喷涂和浸出的表面以及相应的横截面上表征测试样品的微观结构。通过二维二次离子质谱成像对选定的涂层系统进行了研究,以获得有关等离子体在涂层界面上的喷雾诱导扩散过程以及微量和微量元素的空间分布的信息。由薄的(10-15微米)二氧化钛/氧化锆(低共熔比)和二氧化钛粘结涂层组成的涂层,再加上150至180微米厚的HA面漆,可产生超过32 N / m的剥离强度,以及足够的抗吸收性。

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