This textbook has evolved from part of the first-year graduate curriculum in the
Department of Materials Science and Engineering at the Massachusetts Institute of
Technology (MIT) . This curriculum includes four required semester-long subjects-
“Materials at Equilibrium,” “Mechanical Properties of Materials,” “Electrical, Optical,
and Magnetic Properties of Materials,” and “Kinetic Processes in Materials.
Based on irreversible thermodynamics, a new approach to study sorption in polymer has been proposed . This treatment gives a standpoint different from the existing sorption models [2 - 9] not only in interpretation and nature, but also in analytical expression. Moreover, the model also accounts for diffusion and the other internal processes stimulated by sorption such as swelling, plasticization, crystallization etc. Some experimental results of fluid sorption in polymer have been interpreted by this model.
Owing to the diffusion ofmaterial fromone foil to
another, no borderline limitations between single foils in terms of heat transfer exist
any more. Thus, the thermal behavior of diffusion-bonded devices is superior in
comparison to that of the devices manufactured by other bonding techniques. In
Figure 1.13, the diffusion bonding process chain is shown clockwise, starting with
the single foils stack of a cross-ﬂow stainless steel device. Figure 1.14 shows a cut
through a diffusion-bonded stainless steel device.