报告人： Senior Researcher, Dr. S. Agathopoulos
Dept. Materials Science & Engineering
Ioannina University, Greece
报告题目：Joining of bioceramics
时 间：2007年05月15日( 周二) 下午 14: 30－16：00
地 点：曹光彪大楼326
Abstract：
In biomedicine, several complex structures inevitably require joining of two or more phases in a unique structure in the same device. Direct joining at elevated temperatures, having both joint parts at solid state, usually results in poor adhesion due to slow solid diffusion and often limited contacting areas, while prolong exposition of parent materials to high temperatures may jeopardize their biocompatibility. The use of a third auxiliary phase, necessarily made of biocompatible non-toxic elements, which can melt between the parent work-pieces during joining, can shorten joining processing time. Nevertheless, its presence introduces at least one new phase in the composite material. Moreover, the formation of liquid phase does not ensure by itself the increase of contact areas between the two parent work pieces. Biocompatible glasses, whose properties can be potentially regulated by adjusting their composition, can be also used as auxiliary intermediate phases, because they usually wet well and exhibit good chemical affinity to both Ti and hydroxyapatite-like ceramics.
专家简介
Simeon Agathopoulos博士，1994年在希腊Patras大学化学工程系获博士学位。毕业后先后在欧洲原子能共同体挪威高级材料研究院和葡萄牙Aveiro大学任高级研究员。2005年始为希腊Ioannina大学材料科学与工程学系高级研究员。
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材料与化学工程学院材料系
2007.5.14
