Analysis of nickel-clad ceramic powder materials

Mechanical Engineering Research Institute – Branch of Federal Research Center Institute of Applied Physics Academy of Sciences (MERI RAS), Nizhny Novgorod, Russia

^* Corresponding author: krivina.elizaveta@mail.ru

Abstract

The task of developing new powder materials for use in gas-thermal technologies is solved by cladding metal oxide particles with a refractory metal component. The results of studies of powders of domestic production based on aluminum oxide (corundum) and zirconium dioxide subjected to chemical nickel cladding (8 and 30 %) are presented. The morphology, granular and phase compositions, as well as the distribution of the elemental composition were studied using electron microscopy and X-ray diffraction analysis. It is shown that the formation of a dense and homogeneous metal shell around the particles of the matrix material occurs when 30 % of the metal is clad. According to X-ray diffraction analysis, powder materials have a multiphase composition: (Ni + α-Al₂O₃ + γ-Al₂O₃ + γ*-Al₂O₃) − for aluminum oxide powder clad with 8 % Ni; (Ni + α-Al₂O₃ + γ-Al₂O₃) - for aluminum oxide powder clad with 30 % Ni, (Ni + T-ZrO₂) - for dioxide powder zirconium clad with 30 % nickel. New powder materials of domestic production are competitive in relation to foreign analogues and due to cladding with a metal component will contribute to improving the plasticity of plasma coatings formed from them.