Mechanochemical interaction between iron and gallium has been investigated. The multistage character and the dynamics of mechanochemical formation of the gallium solid solution in iron have been estab

Atomic force microscopy and scanning electron microscopy were used to study the structure of metallic cements that are formed upon the interaction of Cu/Bi mechanocomposites with liquid gallium at roo

Composite powder materials containing zirconia and iron oxide nanoparticles, as well as iron-zirconium intermetallic compounds, are of great interest for use as high-temperature functional coatings, in catalysis, and for medical and biotechnological purposes. In this work the influence of the forming local structure of particles during the mechanical activation of Fe/Zr and Fe₂O₃/(Fe/Zr) powder precursors on the microstructure of Fe₂O₃/Fe/Zr/ZrO₂ nanocomposites, synthesized in a SHS combustion mode, is investigated.

The products of mechanochemical synthesis in the Cu–20% Sn system at various stages of mechanical treatment were studied by X-ray diffraction, micro X-ray spectral analysis, and electron microscopy in backscattered electrons. At the initial stage (40 s), an intermetallic compound Cu_6.26Sn₅ is formed, the formation of a solid solution of tin in copper begins with an increase in the processing time, and after 20 min of treatment, a solid solution Cu(Sn) with nanoscale crystallites becomes the only product of synthesis. The products of mechanochemical synthesis of the Cu–20% Sn system were consolidated by electrocontact sintering. Sintering of mechanocomposites after treatment up to 8 min occurs by the liquid-phase mechanism. The coatings formed during sintering have a small number of pores, microhardness of 1460 MPa, and low wear intensity under dry friction (0.0049 mg/m). Electrocontact sintering of mechanocomposites with the structure of a solid solution Cu(Sn) formed after 20 min of mechanical treatment passes through the mechanism of solid-phase sintering and ends with formation of a homogeneous alloy Cu(Sn) with a significant number of discontinuities. The coating is characterized by high microhardness (2350 MPa) and increased wear intensity (0.087 mg/m). Combining precursors obtained by mechanical treatment for 40 s and 20 min in a ratio of 40 : 60 (wt %) allowed forming a coating with a high microhardness, low wear intensity, and low friction coefficient by the method of electrocontact sintering.