KAYA et al.: FABRICATION AND CHARACTERISATION OF ALUMINA CERAMIC MATRIX DTA TGA Temperature,C Fig. 11. DTA and TGA traces(heating rate 10-C/min) for the boehmite sol, showing the phase transformation ation test indicates that the ductile Ni interface was 10 R. Butler, E. G. and Ponton able to deflect the cracks created within the matrix sses.1995.10.1215 proving the presence of a weak interface. Thus, the Ponton, C. B. Ceram Transactions. vol. 8 composite produced in this work should show dam- merican Ceramic Society, Westerville, OH, 1998, pp age-tolerant' behaviour under the operation of crack deflection and fibre pull-out mechanisms. Further 12. Kaya, C. Trusty, P. A and Ponton, C B, in Better Cer- characterisation of the mechanical performance of mics Through Processing, eds J Binner and J. Yeomans, these composites, also at high-temperatures, is the 13. Kaya, C, Trusty, P. A. and Boccaccini, A.R., J.Eur focus of current research 14. Zhang, Z, Huang, Y. and Liang, Z, J. Am. Ceram. 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