Computer simulation of microcomposite ceramics with high transcrystalline mobility

Computer simulation is used to consider the possibility of creation of microcomposite technical ceramics with a high transcrystalline mobility and to show that allowance for the exchange interactions of atoms through nonequilibrium electrostatic fields causes formation of self-organized mesoscopic (...

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Bibliographic Details
Published in:Refractories and industrial ceramics 1999-09, Vol.40 (9-10), p.429-432
Main Authors: Vereshchagin, V I, Sergeev, M A, Borodin, Yu V, Shevelev, O G
Format: Article
Language:English
Subjects:
Allowances
Aluminum oxide
Ceramics
Compression tests
Computer simulation
Electric fields
Electrostatic fields
Simulation
Sol gel process
Sol-gel processes
Strain
Transformations
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Summary:Computer simulation is used to consider the possibility of creation of microcomposite technical ceramics with a high transcrystalline mobility and to show that allowance for the exchange interactions of atoms through nonequilibrium electrostatic fields causes formation of self-organized mesoscopic (SM) blocks, which provide microplasticity and relaxation of strain at lower temperatures. The simulation results agree with the yield stria observed in mechanical compression tests of A12,O3 specimens obtained from sol-gel solutions. It is shown that the yield stria are directly connected with the sizes of the SM blocks. The high mobility of SM blocks also promotes a decrease in the temperature of the gel → A12O3 transformation.
ISSN:1083-4877
1573-9139
DOI:10.1007/BF02764195