Skip to Main Content
Frequently Asked Questions
Submit an ETD
Global Search Box
Need Help?
Keyword Search
Participating Institutions
Advanced Search
School Logo
Files
File List
osu1306634514.pdf (4.17 MB)
ETD Abstract Container
Abstract Header
Phase Equilibria and Interdiffusion in Ni-Cr-Al-Pt Alloy Systems
Author Info
Eastman, Christopher Michael, Jr.
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=osu1306634514
Abstract Details
Year and Degree
2011, Master of Science, Ohio State University, Materials Science and Engineering.
Abstract
Pt-containing NiAl (more simply referred as Pt aluminide) coatings have been widely used in jet engines either as stand-alone oxidation and hot-corrosion resistant coatings or as bond coats in thermal barrier coating systems for life extension and for increased temperature capabilities of the airfoils. To enable computational design and life prediction of these coatings (especially for simulating coating – substrate interactions), phase diagram and diffusivity information of the Ni-Al-Cr-Pt system (including Ni-Al-Cr, Ni-Al-Pt, Ni-Cr-Pt, and Al-Cr-Pt) are essential. Among these ternaries, only Ni-Al-Cr has been well assessed. The remaining three ternaries were studied in the present research using a Ni-Cr-Pt diffusion multiple together with a series of aluminization treatments and electron probe microanalysis to extract phase equilibria and interdiffusion coefficients. Ternary isotherms have been established for Ni-Cr-Pt at 1200 °C, Ni-Pt-Al at 1150 °C, and Cr-Pt-Al at 1010 °C, which either improve upon and expand on existing isotherms or introduce an entirely new phase diagram (Ni-Cr-Pt). Interdiffusion coefficients were extracted using the Hall, Wagner, and Sauer-Freise methods for Ni-Cr, Ni-Pt, Cr-Pt, Ni-Al, Pt-Al, and Ni-Pt-Al systems. The data presented in this thesis will be used to develop both thermodynamic and mobility databases to be applied to the design, processing development, and life prediction of Pt-containing airfoil coatings.
Committee
Ji-Cheng Zhao, PhD (Advisor)
Yunzhi Wang, PhD (Committee Member)
Pages
115 p.
Subject Headings
Engineering
;
Materials Science
;
Metallurgy
Keywords
Ni
;
Cr
;
Pt
;
Al
;
Interdiffusion
;
Phase Equilibria
;
Aluminizing
Recommended Citations
Refworks
EndNote
RIS
Mendeley
Citations
Eastman, Jr., C. M. (2011).
Phase Equilibria and Interdiffusion in Ni-Cr-Al-Pt Alloy Systems
[Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306634514
APA Style (7th edition)
Eastman, Jr., Christopher.
Phase Equilibria and Interdiffusion in Ni-Cr-Al-Pt Alloy Systems.
2011. Ohio State University, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=osu1306634514.
MLA Style (8th edition)
Eastman, Jr., Christopher. "Phase Equilibria and Interdiffusion in Ni-Cr-Al-Pt Alloy Systems." Master's thesis, Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306634514
Chicago Manual of Style (17th edition)
Abstract Footer
Document number:
osu1306634514
Download Count:
1,958
Copyright Info
© 2011, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.