Carbonization Effect on Phase Structures of Zirconium Oxides with 2-3 Percent Yttrium

Abstract:

Phase evolutions and structures of zirconium oxides with 2 percent yttrium before and after carbonization have been systemically studied with X-ray diffraction and Rietveld structural refinement. The carbonization decreases the structural stability of original ZrO₂. According to the X-ray diffraction patterns, three phases with monoclinic, tetragonal and cubic structure coexist after carbonization. With increasing carbonizing temperature, the content of tetragonal phase in ZrO₂ with 2% mol Y2O3 doped increases，however, the phase content of monoclinic phase decreases. The content of tetragonal phase in ZrO₂ with 3% mol Y₂O₃ doped increases greatly after carbonization. It implies that carbonization is beneficial for the formation of ZrO₂ tetragonal phase.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 181-186
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.181
• Online since: June 2014
• Authors: Zhi Qin Xue, Yong Quan Guo*
• Keywords: Carbonization, Phase Structure, Toughness Strengthen, Y₂O₃ Doping, Zro₂

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