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Cracking behaviour of carbon coating on SiC fibre and residual stresses in Ti/SiC MMCs by Q. Fang; P.S. Sidky; M.G. Hocking; J.Y. Zhang is a Engineering article available to read on EtoBox.

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The main purpose of this present work was to study the cracking behaviour of carbon coating on Sic fibre and residual stresses in Ti/SiC metal matrix composites (MMCs) during thermomechanical cycling. Acoustic emission (AE), scanning electron microscopy (SEM), transmission electron microscopy and X-ray photoelectron spectroscopy (XPS) were used in order to get more information of Ti-MMC damage mechanisms under tensile stress at room and elevated temperatures. Ti-6Al-4V/SiC (sigma fibre 1140 plus) composite was used. C coating layer ( ~5 pm) cracking and interface debonding were found after the thermomechanical testing. TIC was found at the carbon/matrix interface was found by means of XPS. The AE peaks and SEM observations reveal that the AE signals come mainly from Sic-C debonding and cracking at room temperature with an increase likelihood of C/matrix debonding at high temperatures and stresses.

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Author

Q. Fang; P.S. Sidky; M.G. Hocking; J.Y. Zhang

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0257-8972)

Published

1998

Language

EN

Field

Engineering (Physical Sciences)