Effect of gold coating on interfacial reaction between dental porcelain and titanium
Effect of gold coating on interfacial reaction between dental porcelain and titanium
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DOI：
10.2320/matertrans.45.3044
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发表时间：
2004-10-01
影响因子：
1.2
通讯作者：
Hisatsune, K
中科院分区：
文献类型：
--
作者：
Miura, E;Tabaru, T;Hisatsune, K
利用能分析硼中轻元素的SEM-EDX对钛烧成瓷插入离子镀金层后的断面显微结构进行了观察。制备了两种应用于镜面钛表面的镀金样品;一种仅进行脱气处理，另一种在脱气处理后进行烧制。此外，为了研究金涂层的效果，还观察了没有涂层的钛/瓷样品。从样品的SEM-EDX观察，在第一个样品中的金膜上出现了大约2.5 μ m厚的氧化钛层。脱气处理后的钛烧成瓷，在金涂层上出现了两个明显的反应层。一种主要包括钛和氧，另一种包括钛，金和铝。反应层的厚度约为2.5-3 μ m。结果表明，钛在瓷中通过一个粗涂层扩散，并在界面处形成氧化钛。无金涂层的钛/瓷在界面处形成两个反应层，但反应层内及层间存在大量裂纹和裂隙。通过与无金涂层的钛/瓷界面的比较，讨论了金涂层对界面层形成的影响。镀金后反应层的厚度减小，反应层中的裂纹和缝隙消失。结果表明，涂层的存在降低了氧的扩散，钛-金反应改变了涂层的组织结构。金向反应层中的扩散和氧的扩散受到限制有助于反应层的形成，从而在钛基体上涂覆金有助于提高钛与瓷的结合力。
Cross-sectional microstructure observation of the titanium firing porcelain inserted ion-coated gold layer was performed by SEM-EDX that can analyze light elements from boron. Two gold-coated samples applied to mirror finished titanium surface were prepared; one was applied only degassing treatment, and the other was applied firing after degassing treatment. In addition, in order to investigate effect of the gold coating, titanium/porcelain samples without coating were also observed. From SEM-EDX observation of the specimen, approximately 2.5 mum thickness titanium oxide layer appeared across the gold film in the first sample. In the titanium firing porcelain after degassing treatment, two obvious reaction layers appeared across the gold coating. One included mainly titanium and oxygen, and another included titanium, gold and aluminum. Thickness of the reaction layers was approximately 2.5-3 mum. From the results, it is suggested titanium was diffused into porcelain through a bold coating, and titanium oxide was formed at an interface. Titanium/porcelain without gold coating had two reaction layers at the interface, however, many cracks and crevices were exhibited in the layer and between the layers. Effect of gold coating on interfacial layer formation was discussed by the comparison with titanium/porcelain interface without gold coating. Thickness of the reaction layers decreased by gold coating, and cracks and crevices in the layer disappeared. The results suggested that oxygen diffusion became lower due to existence of the coating, and titanium-gold reaction changed layer's microstructure. It is also suggested that gold diffusion into the reaction layer and restriction of oxygen diffusion contribute to the reaction layer formation, consequently gold coating on titanium substrate contributes to improvement of adhesion between titanium and porcelain.