Surface segregation in ceramic materials during cooling or under a temperature gradient
作者： G. Petot-Ervas , C. Petot
DOI: 10.1016/0955-2219(90)90024-A
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摘要: Abstract This paper concerns the dynamic segregation of impurities in iono-covalent semiconducting compounds subject to large temperature changes. Simultaneously gradient a chemical potential takes place these compounds. From expression flux mobile species (vacancies and cations considered materials) it has been shown that (or precipitation) effects must be observed near surfaces. These are directly related mobilities different cations. The predicted consistent with layer thicknesses found experimentally ceramic materials after cooling. analysis confirms fact surfaces during cooling taken into account interpretation results at room temperature. changes composition can have important technological consequences, for example powder preparation, consequently sintering or aging ceramics high
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sci-hub.se 参考文章(18)
Han-Ill Yoo, B. J. Wuensch, Concentration Distribution for Diffusion in A Temperature Gradient Transport in Nonstoichiometric Compounds. pp. 169- 187 ,(1985) , 10.1007/978-1-4613-2519-2_14
M. J. Gillan, Diffusion in a Temperature Gradient Mass Transport in Solids. pp. 227- 250 ,(1983) , 10.1007/978-1-4899-2257-1_9
G. Petot-Ervas, Dynamic Segregation in Multicomponent Oxides Under Chemical Potential Gradients Springer, Dordrecht. pp. 337- 349 ,(1989) , 10.1007/978-94-009-1035-5_19
J. Nowotny, Surface and Grain Boundary Segregation in Metal Oxides Springer, Dordrecht. pp. 205- 239 ,(1989) , 10.1007/978-94-009-1035-5_13
Per Kofstad, Nonstoichiometry, diffusion, and electrical conductivity in binary metal oxides. ,(1972)
W. Hirschwald, I. Sikora, F. Stolze, J. Oblakowski, Effect of temperature on chromium segregation to CoO(100) and NiO(100) surfaces Surface and Interface Analysis. ,vol. 14, pp. 477- 481 ,(1989) , 10.1002/SIA.740140809
H. Schmalzried, Behavior of (semiconducting) oxide crystals in oxygen potential gradients Reactivity of Solids. ,vol. 1, pp. 117- 137 ,(1986) , 10.1016/0168-7336(86)80040-7
JOHN R. H. BLACK, W. DAVID KINGERY, Segregation of Aliovalent Solutes Adjacent Surfaces in MgO Journal of the American Ceramic Society. ,vol. 62, pp. 176- 178 ,(1979) , 10.1111/J.1151-2916.1979.TB19048.X
C. Brodhag, J.P. Bach, F. Thévenot, M. Deletter, Microstructure of zirconia-toughened alumina obtained through different precursor routes☆ Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 109, pp. 53- 59 ,(1989) , 10.1016/0921-5093(89)90564-9
G. Petot-Ervas, C. Petot, The influence of impurities segregation phenomena on the oxido-reduction kinetics of oxides Journal of Physics and Chemistry of Solids. ,vol. 51, pp. 901- 906 ,(1990) , 10.1016/0022-3697(90)90029-F