CRYSTAL-STRUCTURE OF THE SURFACE OXIDE LAYER ON TITANIUM AND ITS CHANGES ARISING FROM IMMERSION
CRYSTAL-STRUCTURE OF THE SURFACE OXIDE LAYER ON TITANIUM AND ITS CHANGES ARISING FROM IMMERSION
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DOI：
10.1002/jbm.820290111
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发表时间：
1995-01-01
期刊：
影响因子：
--
通讯作者：
DUCHEYNE, P
中科院分区：
文献类型：
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作者：
EFFAH, EAB;BIANCO, PD;DUCHEYNE, P
钛表面的钝化氧化物是解释该金属在植入物应用中的良好生物反应时考虑的因素之一。在本研究中，透射电子显微镜被用来识别的晶体结构和形态的氧化膜的商业纯钛试样浸泡在模拟生理液之前和之后。结果表明，氧化层主要由金红石和金红石组成，均为四方晶系。虽然模拟的生理流体没有引起可观察到的变化，在晶体结构的浸泡时间的调查，结果表明，从细晶粒到粗晶粒结构的微观结构的浸泡诱导的变化。观察到的晶粒生长可能归因于原生氧化物晶体的生长;然而，它很可能是由于新氧化物层的形成造成的。结果还支持氧化物增厚作为与钛的被动溶解相关的过程之一。(C)1995年，John Wiley and Sons，Inc.
The passivating surface oxide on titanium is one of the elements considered in the explanation of the favorable biologic response of this metal in implant applications. In the present study, transmission electron microscopy was used to identify the crystal structure and morphology of the oxide film on commercially pure titanium specimens before and after immersion in simulated physiologic fluids. The results show that the oxide layer is composed mainly of anatase and rutile, both of which are tetragonal in structure. Although the simulated physiologic fluids did not induce an observable change in the crystal structure for the immersion times investigated, the results indicate an immersion-induced change in microstructure from a fine-grained to a coarser-grained structure. The grain growth observed could be attributed to the growth of the native oxide crystals; however, it most likely results from the formation of a new oxide layer. The results also support oxide thickening as one of the processes associated with passive dissolution of titanium. (C) 1995 John Wiley and Sons, Inc.