Investigation on the Freeze Casting Porous Al2O3 Ceramic Bodies Infiltrated with Nb-Ti-Al-Cr Alloy by Pressureless Infiltration

H.M. Chen; M. Luo; H.C. Wang; P. Fu; D Yang; X.X. Lin; X. Li

doi:10.4028/www.scientific.net/AMM.152-154.188

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 152-154Investigation on the Freeze Casting Porous Al2O3...

Investigation on the Freeze Casting Porous Al₂O₃ Ceramic Bodies Infiltrated with Nb-Ti-Al-Cr Alloy by Pressureless Infiltration

Abstract:

This paper adopted freeze casting method to prepare porous Al₂O₃ ceramic bodies with different volume percentage and interconnected pore channels as the preform. The porous Al₂O₃ ceramic bodies were pressureless infiltrated with Nb-35Ti-20Al-10Cr alloy (atom percentage, at%) by using electromagnetic induction furnace. The results indicated that there is a well wettability between Nb-35Ti-20Al-10Cr melt and porous Al₂O₃ ceramic body. And it would be possible to infiltrate Nb-35Ti-20Al-10Cr melt into porous Al₂O₃ ceramic body through pressureless infiltration. The microstructure observation for the Nb-35Ti-20Al-10Cr/Al₂O₃ composites demonstrated that it was still retained the layer structure characteristics of the preform. The Nb-35Ti-20Al-10Cr melt was filled into the interconnected pore channels existed in the porous Al₂O₃ ceramic bodies and the Nb, Ti, Al, Cr alloy elements diffused into the reinforced Al₂O₃ particles during pressureless infiltration.

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Periodical:

Applied Mechanics and Materials (Volumes 152-154)

Pages:

188-192

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.152-154.188

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Online since:

January 2012

Authors:

H.M. Chen, M. Luo, H.C. Wang, P. Fu, D Yang, X.X. Lin, X. Li

Keywords:

Freeze Casting, Nb-Ti-Al-Cr Alloy, Porous Al₂O₃ Ceramics, Pressureless Infiltration

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