Curvature and bifurcation of MgO-Al₂O₃ bilayer ceramic structures
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Ceramic bilayer structures are formed by coating a green alumina substrate with an aqueous magnesia slurry and then heating the composite body. At high temperature, diffusion and reaction to a spinel can occur, and the body deforms. The deformation of the bilayer structure is attributed to the phase change accompanying spinel formation and to differential sintering between layers. As compared to other bilayer structures obtained by deposition methods, relatively thick top layers are obtained and large strain mismatches occur. At small ratios of the thickness of the top to bottom layer for bilayer plates, equal curvature is observed in two directions whereas at larger thickness ratios, a bifurcation in the deformation behavior is observed with unequal curvature in two directions.
Abstract
Ceramic bilayer structures are formed by coating a green alumina substrate with an aqueous magnesia slurry and then heating the composite body. At high temperature, diffusion and reaction to a spinel can occur, and the body deforms. The deformation of the bilayer structure is attributed to the phase change accompanying spinel formation and to differential sintering between layers. As compared to other bilayer structures obtained by deposition methods, relatively thick top layers are obtained and large strain mismatches occur. At small ratios of the thickness of the top to bottom layer for bilayer plates, equal curvature is observed in two directions whereas at larger thickness ratios, a bifurcation in the deformation behavior is observed with unequal curvature in two directions.
참고문헌 (22)
- S. J. Lombardo, , J. Am. Ceram. Soc, 82(6), pp.1401~1408 (1999)
- C. S. Kim, , J. Am. Ceram. Soc, 88(8), pp.2064~2070 (2005)
- C. S. Kim, , J. Am. Ceram. Soc, 89(9), pp.2718~2725 (2006)
- Stephen J. Lombardo, "Effect of processing on the microstructure and deformation of MgO-Al2O3, CaOAl2O3, and SiO2-Al2O3 layered composites", Journal of Ceramic Processing Research, 8(1), pp.43~51 (2007), 세라믹공정연구센터
- B. D. Harper, , Int. J. Sol. Struct, 26(5, pp.6) (1990), 511~525
- L. B. Freund, "in AMD-Vol. 236, Finite Thermoelasticity, Proceedings of the ASME International Mechanical Engineering Congress and Exposition", pp.1~3 (1999), American Society of Mechanical Engineers
- L. B. Freund, , J. Mech. Phys. Solids, 48, pp.1159~1174 (2000)
- C. B. Masters, , Int. J. Eng. Sci, 31(6), pp.915~925 (1993)
- C. B. Masters, , J. Appl. Mech, 61, pp.872~878 (1994)
- N. J. Salamon, , Int. J. Sol. Struct, 32(3, pp.4) (1995), 473~481
- M. W. Hyer, , J. Comp. Mater, 15, pp.296~310 (1981)
- M. Finot, , J. Mech. Phys. Solids, 44(5), pp.683~721 (1996)
- N. Guyot, , Int. J. Sol. Struct, 41, pp.5143~5154 (2004)
- B. Hallstedt, , J. Am. Ceram. Soc, 75(6), pp.1497~1502 (1992)
- W. P. Whiteny II, , J. Am. Ceram. Soc, 54(7), pp.349~352 (1971)
- P. Zhang, , Metal. Trans, 27A, pp.2105~2114 (1996)
- R. E. Carter, , J. Am. Ceram. Soc, 44(3), pp.116~120 (1961)
- R. K. Bordia, , Acta Metal, 36(9), pp.2393~2397 (1998)
- R. K. Bordia, , Acta Metal, 36(9), pp.2399~2409 (1988)
- P. Z. Cai, , J. Am. Ceram. Soc, 80(8), pp.1929~1939 (1997)
- P. Z. Cai, , J. Am. Ceram. Soc, 80(8), pp.1940~1948 (1997)
- W. N. Findley, "Creep and Relaxation of Nonlinear Viscoelastic Materials" (1976), North- Holland Publishing Company