........ published in NEWSLETTER # 68
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........ published in NEWSLETTER # 68
INTERFACIAL SCIENCE IN CERAMICS JOINING
by Professor A. Bellosi, CNR-IRTEC, Faenza (Italy), Professor A.P. Tomsia, LBNL, Berkeley/CA (U.S.A.), and Professor T. Kosmac, JSI, Ljubljana (Slovenia)
This book (NATO ASI SERIES 3-58) records the proceedings of the NATO Advanced Research Workshop "Interfacial Science in Ceramics Joining", which was held in Bled, Slovenia, in November 1997.
The basic purpose of the workshop was to bring together experts on basic science, physics and chemistry, materials science, engineering, applied technologies working on problems related to the joining of ceramics. Many applications of ceramics require them to be joined to each other or to other materials (metal, glasses, etc.). The interfaces between the two materials created in joining frequently determine the performance of the devices. The technologies that are used to join ceramics are truly critical, because without them many applications requiring the properties of ceramics would be impossible or uneconomical. It is evident that the progress in developing new ceramic materials has not been matched by improvements in science and technology of joining. The solution to these problems must come from an interdisciplinary approach that requires exchanges of experience and observation from many areas of materials science and related disciplines.
The contributions published in the proceedings are organized in 5 sections starting with considerations on wettability and related phenomena, which constitutes the basis for the approach to joinging techniques. In the second section, fundamentals and experimental procedures of different joining techniques: brazing, diffusion bonding, innovative routes are presented. In the third section, interfacial phenomena, phase relationships and microstructural characterization of the interfaces are related to processes and materials. In the fourth section, properties and performance of the joints are discussed in terms of interface properties. Peculiar aspects concerning the joints in electronic applications are presented in the final section.
The book can be considered as a text designed to introduce a broad audience to the science and engineering technologies in the branch of materials science concerning joining ceramics to dissimilar materials. The following topics may be proposed for future activities: - further investigation of the basic science, phase diagrams and wettability - development of innovative joining techniques for complex-shapes - identification of multilayered interfaces, in function of the characteristics of the two materials that have to be joined.
Reference books: E92, 3-22, 3-58, 3-50