Electronic Binding Energy Changes of Elements in Al₂O₃-MgAlON Composite during the Crack Healing Process

Abstract:

Using Al, MgO and Al₂O₃ as raw materials, Al₂O₃-MgAlON composite was synthesized in N₂ atmosphere by hot-press sintering at 900°C. Cracks prepared on the sample surface were healed at 1200°C×6hrs. Phase composition and element chemical state of sample were studied before and after healing. The results showed that: after healing process Al and MgO phase disappeare, and AlN and MgAlON phase appear, all kinds of elements in Al₂O₃-MgAlON material change their chemical state after the healing treatment, the changed electronic binding energy is Al 0.05ev, Mg 0.08ev, O 2.58ev or N 1.02ev respectively, and the chemical composition and crystal structure of MgAlON phase also change, all these change are helpful for crack healing process of Al₂O₃-MgAlON material.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 205-208
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.205
• Online since: July 2011
• Authors: Dao Yuan Yang, Hui Yu Yuan, Fen Ling Qian, Guang Hui Wei, Kai Zhu, Juan Wu, Jing Wei Liu
• Keywords: Al₂O₃-MgAlON Composite, Crack Healing, Electronic Binding Energy, Phase Composition

References

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[3] D. Yang: Ph.D. Thesis, University of Science and Technology Beijing, Beijing, China, 2004.

[4] X. Wang: Ph.D. Thesis, University of Science and Technology Beijing, Beijing, China, 2002.

[5] X. Guo: M.E. Thesis, Zhengzhou University, Zhengzhou, China, 2004.

[6] H. Li: M.E. Thesis, Wuhan University of Science and Technology, Wuhan, China, 2002.