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Exploration of alloy surface and slurry modification to improve oxidation life of fused silicide coated niobium alloys.Edge and surface modification of niobium alloys prior to coating with Si-20Cr-20Fe and slurry composition modification were investigated to improve performance in a 1370 C, ambient pressure, slow-cycle test. The best coating obtained was Si-20Cr-20Mn with an average life of 63 cycles compared to 40 for Si-20Cr-20Fe on FS-85 (100 percent improvement in weight parity life). Edge beading extended the lives of Si-20Cr-20Fe coated Cb-752 and FS-85 to 57 and 41 cycles, respectively (50 and 20 percent improvements in weight parity life, respectively).
Document ID
19720048468
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Levine, S. R.
(NASA Lewis Research Center; U.S. Army, Air Mobility Research and Development Laboratory, Cleveland Ohio, United States)
Grisaffe, S. J.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 6, 2013
Publication Date
May 1, 1972
Subject Category
Machine Elements And Processes
Meeting Information
Meeting: Metallurgical Society and American Institute of Mining, Metallurgical, and Petroleum Engineers, Meeting
Location: Boston, MA
Start Date: May 8, 1972
End Date: May 11, 1972
Sponsors: Metallurgical Society and American Institute of Mining
Accession Number
72A32134
Distribution Limits
Public
Copyright
Other

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