NDLI: Robust Mechanical Properties of Electrically Insulative Alumina Films by Supersonic Aerosol Deposition

Content Provider	Springer Nature Link
Author	Lee, Jong Gun Cha, You Hong Kim, Do Yeon Lee, Jong Hyuk Lee, Tae Kyu Kim, Woo Young Park, Jieun Lee, Dongyun James, Scott C Al Deyab, Salem S. Yoon, Sam S.
Copyright Year	2015
Abstract	Electrically insulating alumina films were fabricated on steel substrates using supersonic aerosol deposition and their hardness and scratchability were measured. Alumina particles (0.4-μm diameter) were supersonically sprayed inside a low-pressure chamber using between 1 and 20 nozzle passes. These alumina particles were annealed between 300 and 800 K to determine the temperature’s effect on film crystal size (37-41 nm). Smoother surface morphology and increased electrical resistance of the thin films were observed as their thicknesses grew by increasing the number of passes. Resistances of up to 10,000 MΩ demonstrate robust electrical insulation. Significant hardness was measured (1232 hv or 13.33 GPa), but the alumina films could be peeled off with normal loads of 36 and 47 N for films deposited on stainless steel and SKD11 substrates, respectively. High insulation and hardness confirm that these alumina films would make excellent electrical insulators.
Starting Page	1046
Ending Page	1051
Page Count	6
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	24
Issue Number	6
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2015-06-17
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	aerosol deposition alumina electrical insulation hardness scratchability 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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