NANOSIZED POWDERS FORMED FROM SOLID SOLUTIONS OF GROUP IV–VI TRANSITION METAL DISILICIDES

Abstract

Solid solutions based on transition metal disilicides have properties that surpass the properties of simple silicides, making them promising for use in many industries. Among the manufacturing methods, mechanical synthesis occupies a particular place as it allows compounds to be obtained as nanosized powders without substantial energy inputs. The mechanism of reactions proceeding in the mechanochemical reactor is studied to make it possible to control the process and obtain products with predetermined properties. Solid solutions based on chromium and molybdenum disilicides were used as an example to examine the features of their production by mechanochemical treatment. It was shown that refractory compounds formed through different mechanisms depending on the properties of reaction products. The results enabled us to establish the mechanism whereby the products formed even before the experiment and choose conditions for the product to acquire the predetermined composition and particle size.