2016 Van Horn Distinguished Lectures: 1 (wetting of interfaces)

The Kent R. van Horn Lectureship is an endowed Lectureship at the Case Western Reserve University and dates from 1974. It honours Kent R. van Horn, an alum, who had a distinguished career as a metallurgist, director of research, and ultimately corporate vice-president of Alcoa. Three lectures on varied topics are to be delivered over three successive days. The 2016 lectures were delivered by Professor Wayne Kaplan of the Department of Materials Science and Engineering Technion – Israel Institute of Technology. This first lecture is about the wetting of interfaces.

These videos are reproduced courtesy of the Materials Science and Engineering Department of Case Western Reserve University.

http://engineering.case.edu/emse/node...
http://www.phase-trans.msm.cam.ac.uk

Abstract:
This presentation reviews the fundamental concepts and the terminology of wetting, and has been designed for students. In particular, it focuses on high temperature wetting phenomena of primary interest to materials scientists. Macroscopic definitions of wetting will first be reviewed, including the overly simplistic Young equation, as well as their importance in practical applications. Partial versus complete wetting will be demonstrated, and the implications on thin film devices and processing will be explored. The microscopic aspects of wetting, where the role of chemistry and structure of interfaces and free surfaces on wetting phenomena, will then be addressed. Finally, the microscopic state of surfaces and interfaces
will be reviewed, clarifying the state of equilibrium between phases, questions about triple lines, adsorption (segregation) and the concept of complexions.