Various issues associated with the design and mechanical evaluation of joints of ceramic matrix composites are discussed. The specific case of an affordable, robust ceramic joining technology (ARCJoinT) to join silicon carbide (CG-Nicalon™) fiber-reinforced-chemically vapor infiltrated (CVI) silicon carbide matrix composites is addressed. Experimental results are presented for the time and temperature dependence of the shear strength of these joints in air up to 1200°C. From compression testing of double-notched joint specimens with a notch separation of 4 mm, it was found that the apparent shear strength of the joints decreased from 92 MPa at room temperature to 71 MPa at 1200°C. From shear stress-rupture testing in air at 1200°C it was found that the shear strength of the joints decreased rapidly with time from an initial shear strength of 71 MPa to a value of 17.5 MPa after 14.3 h. The implications of these results in relation to the expected long-term service life of these joints in applications at elevated temperatures are discussed.
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April 2001
Technical Papers
Design, Fabrication, and Testing of Ceramic Joints for High Temperature SiC/SiC Composites
M. Singh,
M. Singh
Dynacs Engineering Co. NASA Glenn Research Center Cleveland, OH 44135
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E. Lara-Curzio
E. Lara-Curzio
Metals and Ceramics Division Oak Ridge National Laboratory Oak Ridge, TN 37831
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M. Singh
Dynacs Engineering Co. NASA Glenn Research Center Cleveland, OH 44135
E. Lara-Curzio
Metals and Ceramics Division Oak Ridge National Laboratory Oak Ridge, TN 37831
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8–11, 2000; Paper 00-GT-069. Manuscript received by IGTI Oct. 1999; final revision received by ASME Headquarters Oct. 2000. Associate Editor: D. Wisler.
J. Eng. Gas Turbines Power. Apr 2001, 123(2): 288-292 (5 pages)
Published Online: October 1, 2000
Article history
Received:
October 1, 1999
Revised:
October 1, 2000
Citation
Singh, M., and Lara-Curzio, E. (October 1, 2000). "Design, Fabrication, and Testing of Ceramic Joints for High Temperature SiC/SiC Composites ." ASME. J. Eng. Gas Turbines Power. April 2001; 123(2): 288–292. https://doi.org/10.1115/1.1362664
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