NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The wetting characteristics and surface tension of some Ni-based alloys on yttria, hafnia, alumina, and zirconia substratesThe surface tension and wetting characteristics of four commercial Ni-based alloys (UD718, Waspaloy, UD720, and UD520), pure Ni, and three special alloys (Ni-20 percent Cr, Ni-20 percent Cr-1 percent Al, and Ni-20 percent Cr-4 percent Al) on various ceramic substrates (including alumina, zirconia, hafnia, and yttria) were investigated using sessile drop experiments. Most of the systems studied exhibited a nonwetting behavior. Wetting improved with holding time at a given temperature to the point that some systems, such as Ni-20Cr on alumina, Ni-20Cr-4Al on alumina and on yttria, became marginally wetting. Wetting characteristics were apparently related to constitutional undercooling, which in turn could be affected by the metal dissolving some of the substrate during measurements.
Document ID
19880058810
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kanetkar, C. S.
(Alabama Univ. Tuscaloosa, AL, United States)
Kacar, A. S.
(Alabama Univ. Tuscaloosa, AL, United States)
Stefanescu, D. M.
(Alabama, University Tuscaloosa, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1988
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 19A
ISSN: 0360-2133
Subject Category
Composite Materials
Accession Number
88A46037
Funding Number(s)
CONTRACT_GRANT: NAGW-10
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available