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首页> 外文会议>Symposium on Quantum Confined Semiconductor Nanostructures Dec 2-5, 2002 Boston, Massachusetts, U.S.A. >Stoichiometry, crystallinity, and nano-scale surface morphology of the graded calcium phosphate-based bio-ceramic interlayer on Ti-Al-V
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Stoichiometry, crystallinity, and nano-scale surface morphology of the graded calcium phosphate-based bio-ceramic interlayer on Ti-Al-V

机译：Ti-Al-V上梯度磷酸钙基生物陶瓷中间层的化学计量，结晶度和纳米级表面形态

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摘要

A plasma-assisted concurrent Rf sputtering technique for fabrication of biocompatible, functionally graded CaP-based interlayer on Ti-6Al-4V orthopedic alloy is reported. Each layer in the coating is designed to meet a specific functionality. The adherent to the metal layer features elevated content of Ti and supports excellent ceramic-metal interfa-cial stability. The middle layer features nanocrystalline structure and mimics natural bone apatites. The technique allows one to reproduce Ca/P ratios intrinsic to major natural calcium phosphates. Surface morphology of the outer, a few to few tens of nanometers thick, layer, has been tailored to fit the requirements for the bio-molecule/protein attachment factors. Various material and surface characterization techniques confirm that the optimal surface morphology of the outer layer is achieved for the process conditions yielding nanocrystalline structure of the middle layer. Preliminary cell culturing tests confirm the link between the tailored nano-scale surface morphology, parameters of the middle nanostructured layer, and overall biocompatibility of the coating.
机译：报道了一种等离子体辅助并发Rf溅射技术，用于在Ti-6Al-4V骨科合金上制造生物相容的，功能梯度的基于CaP的中间层。涂层中的每一层都经过设计以满足特定的功能。附着在金属层上的特征在于增加的Ti含量，并支持出色的陶瓷-金属界面稳定性。中间层具有纳米晶体结构并模仿天然骨磷灰石。该技术可以重现主要天然磷酸钙固有的Ca / P比。定制了几到几十纳米厚的外层表面形态，以适应生物分子/蛋白质附着因子的要求。各种材料和表面表征技术证实，对于产生中间层的纳米晶体结构的工艺条件，可以实现外层的最佳表面形态。初步的细胞培养测试证实了定制的纳米级表面形态，中间纳米结构层的参数和涂层的整体生物相容性之间的联系。

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