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Solid microstructure interface morphology

The chemistry of solids is more complicated than that of molecules. The properties of solid products depend on the way they are made, which is not true for molecules. Orthodox inorganic chemistry is mainly concerned with molecules. Materials chemistry, on the other hand, deals with solids, surfaces, interfaces, molecules, and atoms. The rates of chemical processes involving solids depend strongly on the spatial arrangement or dimension of the reactant, product, or reaction space, as will be described in Chapter 7. Morphogenesis, the formation of shapes and interconnection between shapes on a micro- and nanoscale, is irrelevant for molecules. For materials technology the microstructure is as important as the atomic composition and crystal structure. The properties of matter depend on the dimension of the atomic distribution of the surfaces or the interfaces—in short on its morphology. [Pg.16]

The morphology of the metal-ceramic interface depends upon the type of interaction that has occurred. If only physical interaction has occurred, the structure of the metal and ceramic is unchanged. However, if a chanical reaction occurs, the morphology is affected depending upon whether solid-solid or solid-liquid reactions occur and if new interfacial phases are formed. The formation of new interfacial phases alters not only the microstructure but also the physical and mechanical properties. These interfacial phases or reaction product layers are a consequence of the reactions needed to cause wetting of the ceramic. One can consider the reaction product layers as chemical bridges between the metal and ceramic. [Pg.207]

Most reactions of a solid are heterogeneous, occurring on the interface between the phases where the reaction and the reaction product are located. The microstructures of solids affect reaction rates and conversely, heterogeneous growth reactions can form many kinds of microstructures. Chapter 6 deals with surface chemistry and the chemical consequences of morphology are discussed in Chapter 7. Another typical feature of solid compounds apart from the presence of a surface is that nonstoichiometries often occur in solids and the stoichiometry strongly affects the properties and the reactions. [Pg.167]


See other pages where Solid microstructure interface morphology is mentioned: [Pg.127]    [Pg.295]    [Pg.301]    [Pg.74]    [Pg.178]    [Pg.11]    [Pg.22]    [Pg.299]    [Pg.55]    [Pg.365]    [Pg.389]    [Pg.842]    [Pg.599]    [Pg.8280]    [Pg.77]    [Pg.238]    [Pg.473]    [Pg.306]    [Pg.58]   
See also in sourсe #XX -- [ Pg.71 , Pg.73 ]




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