Effect of Mechanoactivation on Interfacial Interaction in Metal/Oxide Systems

Abstract

Properties of interfaces in solid state metal/oxide joints (Al/SiO2, Al/MgO, Al/glass, Mg/MgO, Mg/SiO2, In/glass etc.) are reported. The interfaces were formed by plastic deformation of metal on the oxide surface at room temperature. Their structure, chemical composition, and micromechanical properties were studied by the AFM, XRD, SIMS, optical microscopy, and precision microindentation techniques. A noticeable adhesion was observed for metals with high affinity for oxygen and only in the regions of the maximum shear stress. Formation of an interfacial reaction zone with an oxygen concentration gradient is detected. In this zone metals are nanostructured and noticeably hardened. The effect of mechanoactivation is considered as a result of physical and chemical interaction and formation of nanostructures in deformed metal/oxide systems.

Effect of in Doping on the ZnO Powders Morphology and Microstructure Evolution of ZnO:In Ceramics as a Material for Scintillators

“…Zn-0001 surface is more unstable and active for interaction with such additive elements as Ga and In. From this point, the interactions of In 2 O 3 -ZnO occur via mechanical alloying [20] on the edges of Zn-0001 polar plane contacting with the non-polar plane. As a result, there is a violation of the atomic arrangement that leads to the faceting-rounding transitions [17] of powder surfaces and formation of stable ZnInO compound in local contact places.…”