NDLI: Cold-Sprayed Ni-Al$_{2}$O$_{3}$ Coatings for Applications in Power Generation Industry

Content Provider	Springer Nature Link
Author	Sevilla, F. Poza, P. Múnez, C. J. Vezzù, S. Rech, S. Trentin, A.
Copyright Year	2013
Abstract	Cermets coatings are extensively used in energy applications both because of their high wear resistance as required, for example, in components like gas turbine sealants, and because of their specific functionality as required in solar absorbers. So far, high-temperature thermal spraying and physical vapor deposition have traditionally been used to deposit this kind of coatings. In this study, Ni-Al$_{2}$O$_{3}$ coatings have been deposited using a Kinetic$^{®}$3000 cold-spray system starting from Ni and Al$_{2}$O$_{3}$ powders blend; five blends have been prepared setting the alumina content in the feedstock to 10, 25, 50, 75, and 90 wt.%. The embedded alumina ranges between a few percent weight up to 16 and 31 wt.%, while the microhardness shows a deep increase from 175 Vickers in the case of pure Ni coatings up to 338 Vickers. The spray and coating growth mechanism have been discussed, with special attention to the fragmentation of the ceramic particles during the impact. Finally, the coating behavior at high temperature was analyzed by oxidation tests performed in air at 520 °C emphasizing a good oxidation resistance that could represent a very promising basis for application in power generation systems.
Starting Page	772
Ending Page	782
Page Count	11
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	22
Issue Number	5
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2013-01-26
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cermet coatings cold spray isothermal oxidation scanning electron microscopy (SEM) Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Operating Procedures, Materials Treatment Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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