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The interfacial reaction in Cr3C2/Al2O3 composites

Published online by Cambridge University Press:  31 January 2011

Ding-Fwu Lii ,
Jow-Lay Huang ,
Jin-Jay Huang  and
Horng-Hwa Lu
Ding-Fwu Lii
Affiliation:
Department of Electrical Engineering, Chinese Naval Academy, Kaohsiung, Taiwan 813, Republic of China
Jow-Lay Huang
Affiliation:
Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, Taiwan 701, Republic of China
Jin-Jay Huang
Affiliation:
Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, Taiwan 701, Republic of China
Horng-Hwa Lu
Affiliation:
Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, Taiwan 701, Republic of China
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Abstract

This study investigates the effects of sintering atmosphere and temperature on the interfacial properties of Cr3C2/Al2O3 composites. Thermodynamic considerations and calculations with computer-assisted methods for the equilibrium compositions in the Al–O–Cr–C system were used to simulate the interfacial reaction in Cr3C2/Al2O3 composite during sintering. The results were in good agreement with the experimental analysis. Cr3C2 is more stable during sintering in a system with carbon due to the lower equilibrium oxygen partial pressure. Controlling CO and O2 gas concentration, Cr3C2 first oxidized, decarbonized, and then transformed to Cr7C3 before reacting with Al2O3. An interfacial reaction between Cr3C2 and Al2O3 was not observed.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 3 , March 1999 , pp. 817 - 823
Copyright
Copyright © Materials Research Society 1999

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