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The wear products and the friction surfaces of the composite materials fabricated by reactive cast ing after the addition of commercial purity aluminum AD1, titanium and nickel powders, and nanosized modifiers to a matrix melt are studied. The dispersity and the chemical composition of the wear products that form an intermediate layer between the contacting surfaces are analyzed, and the dominating wear mecha nisms under experimental tribological loading conditions are determined. It is shown that the formation of such a disperse intermediate layer during lubricant free friction of the synthesized composite materials decreases the temperature in the tribological contact and ensures a transition from weak to intense wear at higher critical loads.

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