Titlebook: Corrosion of Advanced Ceramics; Measurement and Mode Klaus G. Nickel Book 1994 Springer Science+Business Media Dordrecht 1994 Metall.Raman

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0168-132X ) are revealed..For scientists and engineers in materials science, dealing withceramics and their application. A valuable source for researchstudents, solid state physicists and physical chemists. .978-94-010-4516-2978-94-011-1182-9Series ISSN 0168-132X

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Book 1994, physics, chemistry and mineralogy sum upthe state of the art of measurement and modelling and reveal futureresearch directions. The book reviews the theory of corrosion ofceramics, including the diffusion of gases and the predictions ofthermodynamics; it discusses critically the kinetic models and

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Theoretical Aspects of the Oxidation of Silica-Forming Ceramicsnce both the transport rates of oxygen and CO/N., and their effects are considered..SiC fiber reinforced SiC matrix composites are a new class of ceramics that rely on protection by a silica film. Oxidation of fiber coatings can degrade the performance of such composites and is considered for carbon fiber coatings.

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Non-Parabolic Oxidation Kinetics of Advanced Ceramicsrea, . is the time and a, . and . are constants. It is shown that this law yields apparently consistent parabolic rate constants, .., and activation energies, .., when applied to data obtained from the oxidation of fully dense polycrystalline Si.N., Si.N.O and sialon ceramics.

Discrete

Active to Passive Transition in the High-Temperature Oxidation of CVD SiC and Si3N4osphere. The transition was clearly observed in Ar-O. and N.-O. atmospheres, whereas in CO-CO. atmosphere the active oxidation changed gradually into passive oxidation. The transition mechanism was thermodynamically discussed using Wagner’s model and a volatility diagram.

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Oxidation of Silicon Based Ceramics in the Presence of Alkali Halidesli chlorides and other halides have sufficiently high vapor pressures that silica fluxing can occur without the formation of a condensed halide salt. The rates of oxidation of Si, SiC, and S1.N. are influenced by the composition of gas mixtures containing these species.

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