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The 1200 °C Isothermal Sections of the Ni-Al-Cr and the Ni-Al-Mo Ternary Phase Diagrams

Cutler, Richard Wendel
http://rave.ohiolink.edu/etdc/view?acc_num=osu1301065466

Abstract Details

2011, Master of Science, Ohio State University, Materials Science and Engineering.
The Ni-rich corner of the 1200 °C isothermal sections of both the Ni-Al-Cr and Ni-Al-Mo ternary phase diagrams were obtained using diffusion multiples together with SEM imaging and electro-probe microanalysis (EPMA). In the Ni-Al-Cr system, composition regions of both the Cr-based bcc phase and the β-NiAl phase were observed to be very different from those reported in the literature. For instance, the bcc phase was found to have ~ 26 at% Ni solubility, more than double what has been previously reported in the literature and more consistent with the binary Ni-Cr phase diagram. In the Ni-Al-Mo system a new phase was discovered. This phase, Ni5Al2Mo8, exists in what appears to be a near stoichiometric composition. Its structure is yet to be determined. Reliable phase equilibrium information useful for superalloy development, especially the phase boundary between the fcc (γ) phase and the L12 (γ’) phase was obtained for both ternary systems.
Ji-Cheng Zhao, PhD (Advisor)
Yunzhi Wang, PhD (Committee Member)
Materials Science
Ni-Al-Cr; Ni-Al-Mo; phase diagrams

Recommended Citations

Citations

  • Cutler, R. W. (2011). The 1200 °C Isothermal Sections of the Ni-Al-Cr and the Ni-Al-Mo Ternary Phase Diagrams [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1301065466

    APA Style (7th edition)

  • Cutler, Richard. The 1200 °C Isothermal Sections of the Ni-Al-Cr and the Ni-Al-Mo Ternary Phase Diagrams. 2011. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1301065466.

    MLA Style (8th edition)

  • Cutler, Richard. "The 1200 °C Isothermal Sections of the Ni-Al-Cr and the Ni-Al-Mo Ternary Phase Diagrams." Master's thesis, Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1301065466

    Chicago Manual of Style (17th edition)

osu1301065466
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© 2011, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.