Improvement in Contact Strength of Si3N4/SiC Composite by Crack Healing | Zendy

Koji Takahashi | Zendy; Keita Takahashi | Zendy; Kotoji ANDO | Zendy

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Improvement in Contact Strength of Si₃N₄/SiC Composite by Crack Healing

Author(s) -

Koji Takahashi,

Keita Takahashi,

Kotoji ANDO

Publication year - 2013

Publication title -

journal of powder technology

Language(s) - English

Resource type - Journals

eISSN - 2090-7710

pISSN - 2090-7737

DOI - 10.1155/2013/598024

Subject(s) - materials science , composite number , machining , composite material , ceramic , silicon carbide , silicon nitride , indentation , flexural strength , contact mechanics , structural engineering , metallurgy , finite element method , layer (electronics) , engineering

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

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