High-velocity oxyfuel thermal spray coatings for biomedical applications
High-velocity oxyfuel thermal spray coatings for biomedical applications
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用于生物医学应用的高速火焰热喷涂涂层
DOI：
10.1007/bf02646110
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发表时间：
1995
影响因子：
3.1
通讯作者：
D. Crawmer
中科院分区：
文献类型：
--
作者：
J. Haman;A. Boulware;L. Lucas;D. Crawmer
等离子喷涂用于生产大多数市售的牙科种植体生物陶瓷涂层；然而，这些涂料仍然存在一些不足之处。采用羟基磷灰石（HA）和氟磷灰石（FA）粉末喷涂在钛上，对高速氧燃料（HVOF）燃烧喷涂工艺制备的两种涂层进行了表征，以确定这种相对较新的涂层工艺是否可以应用于生物陶瓷涂层。利用漫反射傅里叶变换红外光谱（FTIR）、x射线衍射（XRD）和扫描电子显微镜（SEM）对涂层的组成、微观结构和形貌进行了表征。XRD和FTIR分析表明，羟基磷灰石和FA涂层均为灰质结构。然而，XRD谱图表明，由于喷涂过程，涂层的结晶度有所下降。FTIR结果显示，由于HVOF喷涂，OH ~和F ~基团的强度下降；然而，磷酸基团仍然存在。扫描电镜分析表明，涂层形貌与等离子喷涂相似，完全覆盖了钛基板。界面扫描电镜研究显示了良好的涂层与衬底的结合。这些结果表明，进一步优化HVOF热喷涂工艺可以为制备生物陶瓷涂层提供另一种方法。
Plasma spraying is used to produce most commercially available bioceramic coatings for dental implants; however, these coatings still contain some inadequacies. Two types of coatings produced by the high- velocity oxyfuel (HVOF) combustion spray process using commercially available hydroxyapatite (HA) and fluorapatite (FA) powders sprayed onto titanium were characterized to determine whether this relatively new coating process can be applied to bioceramic coatings. Diffuse reflectance Fourier transform infrared (FTIR) spectroscopy, x- ray diffraction (XRD), and scanning electron microscopy (SEM) were used to characterize the composition, microstructure, and morphology of the coatings. The XRD and FTIR techniques revealed an apatitic structure for both HA and FA coatings. However, XRD patterns indicated some loss in crystallinity of the coatings due to the spraying process. Results from FTIR showed a loss in the intensity of the OH∼ and F∼ groups due to HVOF spraying; the phosphate groups, however, were still present. Analysis by SEM showed a coating morphology similar to that obtained with plasma spraying, with complete coverage of the titanium substrate. Interfacial SEM studies revealed an excellent coating-to-substrate apposition. These results indicate that with further optimization the HVOF thermal spray process may offer another method for producing bioceramic coatings.