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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Oxidation and SiO_2 Coating on the Bonding Strength of Ti-Porcelain
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Effect of Oxidation and SiO_2 Coating on the Bonding Strength of Ti-Porcelain

机译：氧化和SiO_2涂层对钛瓷结合强度的影响

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摘要

Investigations on the effect of oxidation on titanium-ceramic adhesion were performed. Cast pure titanium was subjected to surface modification by preoxidation and introduction of an intermediate layer of SiO_2 by sol-gel process. Specimens were characterized by TG-DSC, XRD, and SEM/EDS. The adhesion between the titanium and porcelain was evaluated by three-point flexure bond test. Failure of the titanium-porcelain with preoxidation treatment predominantly occurred at the titanium-oxide interface. Preoxidation treatment did not affect the fracture mode of the titanium-ceramic system and did not increase the bonding strength of Ti-porcelain. The SEM results revealed the existence of microcracks on the SiO_2 coating surface oxidized at 800℃ in an air furnace. During the porcelain fusion, minute amounts of oxygen were able to penetrate the cracks and caused localized oxidation of the Ti-substrate. Failure of the titanium-porcelain with SiO_2 coating predominantly occurred at the SiO_2 layer. The SiO_2 coating served as an effective oxygen diffusion barrier and improved the mechanical and chemical bonding between porcelain and titanium.
机译：进行了氧化对钛-陶瓷粘附的影响的研究。通过预氧化对铸造的纯钛进行表面改性，并通过溶胶-凝胶工艺引入SiO_2中间层。样品用TG-DSC，XRD和SEM / EDS表征。钛和瓷器之间的粘附力通过三点挠曲粘结试验评估。经预氧化处理的钛瓷失败主要发生在钛氧化物界面。预氧化处理不会影响钛陶瓷系统的断裂模式，也不会增加钛瓷的结合强度。 SEM结果表明，在800℃的空气炉中氧化后的SiO_2涂层表面存在微裂纹。在瓷熔合过程中，微量的氧气能够穿透裂纹并引起Ti基底的局部氧化。钛瓷的SiO_2涂层失效主要发生在SiO_2层。 SiO_2涂层可作为有效的氧扩散屏障，并改善瓷器和钛之间的机械和化学键合。

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