Ceramics have been used as bearing and cutting tool components,which are subjected to contact loading during their operation.The\r\npresence of surface cracks on these components decreases their contact strength.Thus, the reliability of ceramic components can be\r\nincreased by improving their contact strength through crack healing. In the present study, the effects of crack healing on the contact\r\nstrength of a silicon carbide-(SiC-) reinforced silicon nitride (Si3N4) composite subjected to various machining processes were\r\ninvestigated. The contact strength of this composite was evaluated using a sphere indentation test in which acoustic emission was\r\nused.The results showed that the contact strength of the composite improved when it was subjected to crack healing in combination\r\nwith rapping; this was true even when the composite had cracks due to a heavy machining process.
Loading....