Abstract
The microstructural development and fracture characteristics of a bulk plasma-sprayed alumina material is investigated in the as-sprayed and various annealed material conditions, using electron microscopy, porosimetry, and CT specimens in in-situ SEM experiments.
Toughness increases significantly after heat treatment. All material conditions exhibit pronounced R-curve behaviour. In the short-crack range broken splats act as bridges resulting in steeply rising toughness. In the longer-crack range larger features cause a less steep, but steady rise in toughness.
The fracture behaviour of plasma-sprayed alumina is the result of results the alignment of microstructure and a splat-internal microcrack sub-structure which provides low energy crack paths. This sub-structure changes extensively on annealing. The biggest change on annealing is not an overall sintering effect, but rather the recrystallisation of the splat internal substructure.
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Appendix References
A. Kelly, W.R. Tyson, Tensile properties of fibre reinforced metals: Copper/Tungsten and Copper/Molybdenum, J. Mech. Phys. Solids, 13, 329–350 (1965).
A. Kelly, W.R. Tyson, Tensile properties of fibre reinforced metals—lI. Creep of Silver–Tungsten, J. Mech. Phys. Solids, 14, 177–186 (1966).
M.F. Ashby, D.R.H. Jones, Engineering Materials 2: An Introduction to Microstructures, Processing and Design, Pergamon Press, Oxford (1992).
D. Hull, An Introduction to Composite Materials, Cambridge University Press, Cambridge (1992).
R.J. Damani, E.H. Lutz, Microstructure, Strength and Fracture Characteristics of a Free Standing Plasma-Sprayed Alumina, J. Eur. Ceram. Soc., 17, 1351–1359 (1997).
A.Wanner, R.J. Damani, Effect on Annealing on the Microstructure and Elastic Properties of Plasma-Sprayed Alumina, Submitted to 10th Int. Conf. on Rapidly Quenched and Metastable Màterials, Indian Iinstitute of Science, Bangalore (1999).
H. M. Chou, M.W. Barsoum, M.J. Koczak, Effect of Temperature on Interfacial Shear Strengths of SiC/Glass Interfaces, J. Mat. Sci., 26, 1216–1222 (1991).
A8. J.D. Bright, S. Danchaivijit, D.K. Shetty, Interfacial Sliding Friction in Silicon Carbide–Borosilicate Glass Composites: A Comparison of Pullout and Pushout Tests, J. Am. Ceram. Soc., 74, 115–122 (1991).
B. Martin, M. Benoit, D. Rouby, Interfacial Sliding Strengthin Fibre Reinforced Ceramic Matrix Composites Involving Positive Radial Thermal Misfit Strain, Scripta Metal. et Mat., 28, 1429–1433 (1993).
T.P. Weihs, W.D. Nix, Experimental Examination of the Push-Down Technique for Measuring the Sliding Resistance of Silicon Carbide Fibers in a Ceramic Matrix, J. Am. Ceram. Soc., 74, 524–534 (1991).
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Damani, R.J. (2002). Heat Treatment Induced Changes in Fracture Behaviour of Bulk Plasma Sprayed Alumina. In: Bradt, R.C., Munz, D., Sakai, M., Shevchenko, V.Y., White, K. (eds) Fracture Mechanics of Ceramics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-4019-6_10
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DOI: https://doi.org/10.1007/978-1-4757-4019-6_10
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