Characterization of fuzzy interface in biomaterials by HREM

本研究旨在评价具有较好生物相容性的金属-陶瓷复合材料的键特性。理解接口的本质是非常重要的。研究金属与陶瓷界面的形成过程和基本结构是改进键合技术的重要要求。主要得到以下两个重要结论：1。探讨了如何制备高分辨率透射电镜观察复合材料界面的样品。这种技术在进行直接观察时非常有效。特别地，本研究适用于力学性能差异显著的材料的界面。结果表明，牙用金合金与牙用瓷是直接结合的，没有中间层。这是该系统的新证据。这意味着之前的结论被否定了。以前的数据不是在界面本身获得的，而是在附近获得的。先前获得的EPMA数据对应的是微米尺度的信息，而HREM数据对应的是纳米尺度的信息。

The present study was planned to evaluate the bond characteristics in a metal-ceramic composite with better bio-compatibility. It is very important to understand nature of the interface. The investigation of the formation process and the fundamental structure within the interface between metal and ceramics is an important requirement for improving the bonding technique. Two signiticant conclusions were mainly obtained as follows ;1. It was constructed how to produce better specimen for high resolution transmission electron microscopic observations on the interface of the composite materials. This technique is very effective to perform a direct observation. Especially, the present study was employed for the interface of the materials with remarkably different mechanical properties.2. It is determined that the dental gold alloy and the dental porcelain were directly bonded without any intermediate layrs. This is new evidence for the system. It means that previous conclusion was rejected. The previous data were not obtained at interface itself but at the vicinity. The EPMA data which were previously obtained, correspond to the information in micrometer scale, while the present HREM data were obtained in nanometer scale.