Journal
JOURNAL OF COMPOSITE MATERIALS
Volume 55, Issue 27, Pages 3945-3953Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/00219983211031653
Keywords
Metal matrix composite; Fibre push-out; Interface; Debonding strength; Mechanism
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In this study, the debonding behavior at the fibre/matrix interface in a unidirectional continuous carbon-coated SiC fibre reinforced Ti-17 composite was investigated. The interface debonding strength was found to be 108.2 MPa, occurring between the interface reaction zone and the carbon coating on the fibre surface. The carbon coating/SiC fibre interface and the RZ/matrix interface remained intact after the fibre was pushed out.
The debonding behaviour at the fibre/matrix interface in a unidirectional continuous carbon-coated SiC fibre reinforced Ti-17 composite was investigated. Single fibre push-out testing on thin slice specimen by micro-indentation was employed to evaluate the interface debonding strength. In order to investigate interface debonding modes, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were utilised to observe the microstructure at the fibre/matrix interface region after the fibres were pushed out. It is found that the interface debonding strength is evaluated to be 108.2 MPa in the composite. The interface debonding occurs at the interface between the interface reaction zone (RZ) and the carbon coating on the fibre surface. The carbon coating/SiC fibre interface and the RZ/matrix interface remain intact after the fibre was pushed out.
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