Destabilizing Effect of Zirconia Products Caused by Aluminum

Xiao Li Tian; Qun Hu Xue; Chong Bo Xue

doi:10.4028/www.scientific.net/AMR.476-478.799

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 476-478Destabilizing Effect of Zirconia Products Caused...

Destabilizing Effect of Zirconia Products Caused by Aluminum

Abstract:

Thermodynamic analysis on destabilizing effect of zirconia products caused by aluminum is carried on by using material Gibbs free energy function, and then the experimental verification was tested by scanning electron microscope (SEM). The results show that: 1) aluminum reacts with calcium oxide, the stabilizer of zirconia, forming some sheet-like calcium hexaluminate. It results in the stabilizer loss and the volume destabilization of zirconia. 2) Aluminum reacts with magnesium oxide, the stabilizer of zirconia, forming some octahedral magnesia-alumina spinel. It results in the stabilizer loss and the volume destabilization of zirconia. 3) The destabilizing effect of zirconia caused by aluminum can be defined three layers, which are original layer, transition layer and reaction layer.

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Periodical:

Advanced Materials Research (Volumes 476-478)

Pages:

799-804

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.476-478.799

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Online since:

February 2012

Authors:

Xiao Li Tian, Qun Hu Xue, Chong Bo Xue

Keywords:

Aluminum (Al), Destabilizing Effect, Stabilized Zirconia, Stabilizer, Thermodynamic Calculation

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