Nickel-based superalloy operating temperature determination via analysis of gamma/gamma' microstructure and coating/base material interdiffusion

Title:	Nickel-based superalloy operating temperature determination via analysis of gamma/gamma' microstructure and coating/base material interdiffusion
Author:	Ham, Wendy D. (Wendy Decker)
Other Contributors:	Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
Advisor:	Samuel M. Allen.
Department:	Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
Publisher:	Massachusetts Institute of Technology
Issue Date:	2005
Abstract:	The average operating temperature of RENÉ N5® high pressure turbine blades was evaluated via [gamma]/[gamma]' microstructure and coating/base metal interdiffusion methods. The [gamma]' volume fraction was measured by point counting and direct area measurement. The data, however, were found inadequate to accurately determine the operating temperature. The interdiffusion between the platinum aluminide coating and the base material was modeled with an error function solution to Fick's Second Law. This method provided an estimation of the operating temperature that varied from the reported operating temperature by only 1%.
Description:	Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2005. Includes bibliographical references (leaves 23-25).
URI:	http://hdl.handle.net/1721.1/33397
Keywords:	Materials Science and Engineering.

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