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首页> 外文会议>13th International Symposium on Ceramics in Medicine and the Annual Meeting of the International Society for Ceramics in Medicine 22-26 November 2000 Bologna, Italy >The Influence of Processing Parameters on the HA Products of RF Thermal Plasma-Sprayed HA/Ti Composite Coatings
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The Influence of Processing Parameters on the HA Products of RF Thermal Plasma-Sprayed HA/Ti Composite Coatings

机译：工艺参数对射频热等离子体喷涂HA / Ti复合涂层HA产物的影响

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摘要

The influences of plasma processing parameters on the characteristics of HA/Ti composite coatings, and particularly on their surface A-layers, were investigated. HA/Ti composite coatings were deposited on titanium substrates by a radio-frequency (rf) thermal plasma spraying method with rf input powers of 10-30 kW. XRD patterns showed that the topmost HA layer of the composite coatings had an apatite structure with (001) preferred orientation. The degree of this orientation was little affected by RF input power while it showed a tendency to increase with an increase in the substrate temperature during spraying. Some minute X-ray peaks ascribable to tetracalcium phosphate, tricalcium phosphate and calcium oxide were also observed. Their peak intensities were remarkably high when rf input power was 17 kW or more, while these only slightly affected by the substrate temperature during spraying. The crystallinities of the coatings sprayed at 12, 17 and 27 kW were 82, 68 and 70percent, respectively. The crystallinity of the coating also decreased when RF input power was 17 kW or over. On the other hand, the coating crystallinity was affected little by the substrate temperature during spraying.
机译：研究了等离子工艺参数对HA / Ti复合涂层性能的影响，特别是对表面A层的影响。 HA / Ti复合涂层通过射频（rf）热等离子体喷涂方法沉积在钛基板上，射频输入功率为10-30 kW。 XRD图谱表明，复合涂层的最顶层HA层具有磷灰石结构，具有（001）优选取向。该取向的程度几乎不受RF输入功率的影响，而在喷涂过程中却表现出随着基板温度的升高而增加的趋势。还观察到归因于磷酸四钙，磷酸三钙和氧化钙的一些微小的X射线峰。当rf输入功率为17 kW或更高时，它们的峰值强度非常高，而在喷涂过程中，这些峰值强度仅受基材温度的轻微影响。以12、17和27 kW喷涂的涂层的结晶度分别为82％，68％和70％。当RF输入功率为17 kW或更高时，涂层的结晶度也会降低。另一方面，在喷涂过程中，涂层的结晶度几乎不受基材温度的影响。

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