Tensile strength of silicon carbide fibre bundles at elevated temperatures
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The mechanical properties of commercially available SiC-based ceramic fibres were measured in the temperature range from 400–1300°C. The measurements were performed in air and in inert gas atmospheres, respectively. The Nicalon™ and Tyranno™ fibres were tested as filament bundles and the decrease in strength occurring at temperatures above 600 °C was found in both atmospheres. To obtain a well-defined gauge length at the testing temperature, a furnace with very steep temperature gradients at both ends was built. To eliminate grip-induced damage in the heating zone the fibre bundles were fixed outside the furnace with cold grip units. These grips guaranteed the uniformity of load distribution imposed on to each of the individual filaments in the fibre bundle. A significant shrinkage of the fibres occurring during the creep test performed under low loads indicates a change in the microstructure of the fibres at high temperatures.
KeywordsFurnace Carbide Tensile Strength Shrinkage Silicon Carbide
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- 2.A. S. Fareed, P. Fang, M. J. Koczak and F. M. Ko, Am. Ceram. Soc. Bull. 66 (1987) 353.Google Scholar
- 6.R. E. Tressler and J. A. Dicarlo, in “Proceedings of the 6th European Conference on Composite Materials, Bordeaux; EECM-6, Euro-Japanese Colloquium on Ceramic Fibres (eds) A. R. Bunsell and I. Kimpara” (1993) pp. 33–49.Google Scholar
- 7.R. Bodet, J. Lamon and R. E. Tressler, ibid. pp. 75–83.Google Scholar
- 14.J. Lipowitz, J. A. Rabe and R. M. Salinger, in “International Fiber Science Technology Series 12, 1993, Vol. 3, “High Technology Fibers”, Part C” pp. 207–73.Google Scholar
- 17.J. Lipowitz, Am. Ceram. Soc. Bull. 70 (1991) 1888.Google Scholar
- 18.T. Shimoo, Y. Kakehi, H. Chen and K. Okamura, Funtai oyobi Funmatsu Yakin 39 (1992) 86.Google Scholar
- 19.D. J. Pysher, Nanying Jia, R. J. Bodet and R. E. Tressler, in “High Performance Composites of the 1990's”, edited by S. K. Das, C. P. Ballard and F. Marikar (TMS, Warrendale, PA, 1990) pp. 267–81.Google Scholar
- 20.J. A. Dicarlo and G. N. Moscher, in “Failure Mechanisms in High Temperature Composite Materials”, ASME, AD-Vol. 22/AMD-Vol. 122 (1991) pp. 15–22.Google Scholar