Structure and Phase Composition of a Ti Film–Al Substrate System Irradiated with an Intense Pulsed Electron Beam

Commercially pure A7 aluminum was exposed to surface modification in a single vacuum cycle which included vacuum arc evaporation and deposition of commercially pure titanium and intense electron beam irradiation and melting of the film–substrate system using a plasma-cathode pulsed electron source....

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Bibliographic Details
Published in:Key engineering materials 2018-09, Vol.781, p.101-107
Main Authors: Petrikova, Elizaveta A., Moskvin, Pavel, Ivanova, Olga V., Tolkachev, Oleg S., Krysina, Olga V., Ivanov, Yurii F.
Format: Article
Language:English
Subjects:
Aluminum
Arc deposition
Electron beams
Electron irradiation
Film thickness
Inclusions
Intermetallic compounds
Microhardness
Multilayers
Phase composition
Plasma
Resistance factors
Submerging
Substrates
Surface hardness
Surface layers
Titanium aluminides
Transition layers
Wear resistance
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Summary:Commercially pure A7 aluminum was exposed to surface modification in a single vacuum cycle which included vacuum arc evaporation and deposition of commercially pure titanium and intense electron beam irradiation and melting of the film–substrate system using a plasma-cathode pulsed electron source. The deposited Ti film thickness was 0.5 and 1 μm. The irradiated Ti–Al system revealed a multilayer multiphase structure consisting of submicro-and nanosized elements with intermetallic inclusions Al3Ti, Al2Ti, and TiAl3. The Ti film during irradiation broke up into fragments with their immersion in the molten Al surface layer to a depth of 20 μm. The modified material surpassed the initial aluminum in wear resistance by a factor of 2.4 and in microhardness by a factor larger than 4. The main cause for the high surface hardness and high wear resistance of the modified aluminum was likely the formation of both the intermetallic particles and the Ti-hardened transition layer.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.781.101