Publicado 4 números por año
ISSN Imprimir: 1093-3611
ISSN En Línea: 1940-4360
Indexed in
FILM–SUBSTRATE SURFACE ALLOY FORMED BY AN INTENSE PULSED ELECTRON BEAM
SINOPSIS
Commercially pure A7 aluminum was surface alloyed with commercially pure VT1-0 titanium on COMPLEX equipment under unified vacuum conditions through vacuum arc evaporation and deposition of a thin Ti film and irradiation of the film–substrate system with a submillisecond intense pulsed electron beam. The number of deposition–irradiation cycles was varied from 1 to 20. The film thickness in each cycle was 0.5 μm. After multicycle surface alloying, a multiphase surface layer was formed containing AlTi, Al2Ti, Al3Ti, TiAl3, and Al5Ti2 in addition to solid solutions based on Al and α-Ti. Increasing the number of deposition–irradiation cycles from 1 to 20 increased the relative content of intermetallic compounds in the surface layer. After 20 cycles, the modified material revealed an intermetallic surface layer consisting of a mixture of AlTi (53.3 wt.%), Al3Ti (36.6 wt.%), and Al5Ti2 (9.4 wt.%) with a submicro- and nanosized multilayer structure in the material bulk. The microhardness and the wear resistance of the modified material increased with the increasing number of cycles, and after 20 cycles, their values were respectively ≈ 8.5 and ≈ 45 times higher than those in A7 aluminum.