The objective of this publication is to discuss various aspects relevant to the interface of ceramics from a number of standpoints. The aim has been reached by presenting the contributions of a wide spectrum of specialists. This approach enables the reader to grasp the present level of knowledge and to understand the problems in research of various fields relevant to ceramic interfaces. Further, it facilitates a charting of the direction of future research in these fields which are much too complex to be covered by a single scientific discipline.