In this book basic and some more advanced thermodynamics and phase as well as stability diagrams relevant for diffusion studies are introduced. Following, Fick's laws of diffusion, atomic mechanisms, interdiffusion, intrinsic diffusion, tracer diffusion and the Kirkendall effect are discussed. Short circuit diffusion is explained in detail with an emphasis on grain boundary diffusion. Recent advances in the area of interdiffusion will be introduced. Interdiffusion in multi-component systems is also explained. Many practical examples will be given, such that researches working in this area can learn the practical evaluation of various diffusion parameters from experimental results. Large number of illustrations and experimental results are used to explain the subject. This book will be appealing for students, academicians, engineers and researchers in academic institutions, industry research and development laboratories.

Aloke Paul is an associate professor in the Department of Materials Engineering, Indian Institute of Science (IISc), Bangalore, India. Professor Aloke Paul is currently running an active research group working on diffusion related problems with major areas of research including developing new phenomenological models in solid-state diffusion, materials in electronic packaging, bond coat in jet engine applications and growth of A15 intermetallic superconductors. He teaches a postgraduate level course on diffusion in solids and has guided several PhD and ME students. He has co-authored more than 80 articles in various international journals.

Professor Tomi Laurila received his D.Sc. degree (with honours) in electronics production technology from the Helsinki University of Technology in 2001. He presently works as a teaching scientist in the group of Electronics Integration and Reliability and holds an adjunct professorship on Electronics Reliability and Manufacturing. His research currently involves the study of interfacial reactions between dissimilar materials used in micro and bioelectronics. He has published extensively, including around 70 scientific papers, book chapters and a text book, on topics such as the thermodynamic-kinetic analysis of interfacial reactions, electrochemical detection of biomolecules and issues related to reliability testing of electronic devices. Professor Laurila is also responsible for the teaching of material science, electronics reliability and bio-adaptive technology to undergraduate, postgraduate and postdoctoral students.

Dr. Vesa Vuorinen received a D.Sc. degree in electronics production technology from the Helsinki University of Technology in 2006. Since then he has been working as a research scientist and full-time teacher in the group of Electronics Integration and Reliability at Aalto University. His research includes manufacturing and reliability of high-density electronics assemblies with emphasis on soldering metallurgy and thermodynamics of materials.

Dr. Sergiy Divinski is a Privat-Docent at the Institute of Materials Physics, University of Münster, Germany, where he leads the radiotracer laboratory. He teaches graduate and postgraduate courses on diffusion in solids, numerical methods in material science and different aspects of materials science. He has co-authored more than 150 articles in various international journals and several book chapters in the field of diffusion in solids.