graduate student
Samara, Samara, Russian Federation
VAC 2.6.17 Материаловедение
UDK 539 Строение материи
BBK 342 Металловедение
The study results are given which are devoted to finding the effect of reinforcement with fine phase of titanium carbide in the amount of 10 masses% on the physico-mechanical and tribotechnical properties of industrial aluminum AM4.5Kd alloy. The physico-mechanical (density, porosity, coefficient of thermal linear expansion, hardness, microhardness) and tribotechnical (wear rate, friction factor, self-heating temperature) properties of the composite material AM4.5Kd-10%TiC obtained by self-propagating high-temperature synthesis before and after heat treatment are analyzed. It is found out that composite samples after heat treatment have a good combination of physical and mechanical properties, namely a low level of porosity, a low value of the coefficient of thermal linear expansion, and the values of hardness and microhardness are increased twice. Special attention should be paid to the fact that reinforcement with a ceramic phase in combination with heat treatment leads to a significant increase in the level of wear resistance of the matrix alloy (by 9 times) and a decrease in the friction factor (by 4 times). Thus, according to the results of the studies conducted, the resulting composite material AM4.5Kd-10%TiC can be recommended as a material used in tribological assemblies.
composite material, aluminum, titanium carbide, tribology, high-temperature synthesis
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