Investigation of the Formation of a Fine-Crystalline Alumina Coating on the Surface of a Blank Aluminum Powder Coating Test Panel as a Result of its Filtration Combustion


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Formation of a fine-crystalline α-Al2O3 coating on the surface of an aluminum blank powder coating test panel by filtration combustion (FC) in air was investigated. Finely ground sodium silicate glass (1 vol.%) introduced into the composition of the blank aluminum panels was used as the activating agent of the filtration combustion. It was found that a fine-crystalline aluminum oxide coating with a thickness of 30 – 50 μm with crystals ranging 0.1 – 2.0 μm in size forms over the entire surface of the sample upon completion of the filtration combustion. The properties of the produced samples were as follows: density 2.3 g/cm2, open porosity 15%, ultimate bending stress 120 MPa, fracture toughness 3.6 MPa·m1/2, Brinell hardness 32.

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D. Ivanov

Moscow Aviation Institute (National Research University)

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Email: dali_888@mail.ru
俄罗斯联邦, Moscow

A. Sitnikov

Joint Institute for High Temperatures of the Russian Academy of Sciences

Email: dali_888@mail.ru
俄罗斯联邦, Moscow

G. Val’yano

A. A. Baikov Institute of Metallurgy and Materials Science (IMET) of the Russian Academy of Sciences (RAS)

Email: dali_888@mail.ru
俄罗斯联邦, Moscow

S. Shlyapin

Moscow Aviation Institute (National Research University)

Email: dali_888@mail.ru
俄罗斯联邦, Moscow

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