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An orientation study of Al2IO3/AlCo-continuous ceramic composites

Nash, James Michael
http://rave.ohiolink.edu/etdc/view?acc_num=osu1407408008

Abstract Details

2004, Master of Science, Ohio State University, Materials Science and Engineering.
Due to an ever increasing industrial demand for ceramic components with complicated geometries, much attention has been addressed to new, low cost processing routes. Of recent interest is the use of a new reaction-based processing technique, generating Co-Continuous Ceramic Composite (C4) materials. The basis of this new processing technique relies on a displacement reaction. Of particular interest to this research is the Al2O3 -- Al system. In this case a displacement reaction takes place between a silica precursor and molten Al: 4Al (1) + 3SiO2 (s) --> 2Al2O3 (s) + 3 [Si]Al where [ ] represent the Si dissolved in the liquid Al. This displacement reaction results in an interpenetrating alpha-Al2O3/Al composite. It has recently been discovered that there exists a strong relationship between the processing techniques used in creating the ceramic-metal composites and the resulting microstructure. This study employs orientation imaging microscopy (OIM) technique based on electron backscattered diffraction (EBSD) in a scanning electron microscope (SEM). Orientation data was examined for composites made with different processing conditions. These composites generally exhibited [0001] growth orientations in the alpha-Al2O3 phase. High fractions of low energy 60° boundaries were also observed in the alpha-Al2O3 phase. These low energy boundaries may lead to beneficial mechanical properties.
Glenn S. Daehn (Advisor)
Michael J. Mills (Committee Member)
199 p.
Materials Science

Recommended Citations

Citations

  • Nash, J. M. (2004). An orientation study of Al2IO3/AlCo-continuous ceramic composites [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407408008

    APA Style (7th edition)

  • Nash, James. An orientation study of Al2IO3/AlCo-continuous ceramic composites. 2004. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1407408008.

    MLA Style (8th edition)

  • Nash, James. "An orientation study of Al2IO3/AlCo-continuous ceramic composites." Master's thesis, Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407408008

    Chicago Manual of Style (17th edition)

osu1407408008
122
© 2004, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.