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Wet erosion damage of Cr3C2/Al2O3 composite

Published online by Cambridge University Press:  31 January 2011

Ching-An Jeng
Affiliation:
Deparment of Material Science & Engineering, National Cheng-Kung University, Tainan, Taiwan 701, Republic of China
Jow-Lay Huang*
Affiliation:
Deparment of Material Science & Engineering, National Cheng-Kung University, Tainan, Taiwan 701, Republic of China
*
a)Address all correspondence to this author. e-mail: JLH888@mail.ncku.edu.tw
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Abstract

This study focused on investigating the role of interfacial microcracking of injection-molded Cr3C2/Al2O3 composite on the erosion mechanism under an impingement erosion test rig. The surface residual strain (stresses) as well as damage were compared in both airborne and wet erosion. The delays in crack propagation at interfacial or triple points and the crack direction changes were frequently observed in the composite. Spontaneous microcracking induced from sintering process, due to thermal expansion mismatch between alumina and chromium carbide, played a key role in erosion mechanism.

Type
Articles
Copyright
Copyright © Materials Research Society 2003

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