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Young's Moduli of Cold and Vacuum Plasma Sprayed Metallic CoatingsMonolithic metallic copper alloy and NiCrAlY coatings were fabricated by either the cold spray (CS) or the vacuum plasma spray (VPS) deposition processes. Dynamic elastic modulus property measurements were conducted on these monolithic coating specimens between 300 K and 1273 K using the impulse excitation technique. The Young's moduli decreased almost linearly with increasing temperature at all temperatures except in the case of the CS Cu-23%Cr-5%Al and VPS NiCrAlY, where deviations from linearity were observed above a critical temperature. It was observed that the Young's moduli for VPS Cu-8%Cr were larger than literature data compiled for Cu. The addition of 1%Al to Cu- 8%Cr significantly increased its Young's modulus by 12 to 17% presumably due to a solid solution effect. Comparisons of the Young s moduli data between two different measurements on the same CS Cu- 23%Cr-5%Al specimen revealed that the values measured in the first run were about 10% higher than those in the second run. It is suggested that this observation is due to annealing of the initial cold work microstructure resulting form the cold spray deposition process.
Document ID
20090015379
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Raj, S. V.
(NASA Glenn Research Center Cleveland, OH, United States)
Pawlik, R.
(Toledo Univ. Toledo, OH, United States)
Loewenthal, W.
(Starck (H. C.), Inc. Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
March 1, 2009
Subject Category
Metals And Metallic Materials
Report/Patent Number
E-16678
NASA/TM-2009-215509
Funding Number(s)
WBS: WBS 561581.02.08.03.15.02
Distribution Limits
Public
Copyright
Public Use Permitted.
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