L. F. Koroleva

NANOPARTICULATE ZIRCONIA-MODIFIED SOLID SOLUTIONS OF ALUMINUM-IRON OXIDES FOR POLISHING TITANIUM METAL

A synthesis mechanism of nanoparticulate zirconia-modified Al_2–xFe_xO₃ solid solutions has been studied with the application of X-ray diffraction, IR spectroscopy, DTA, particle-size analysis and chemical analysis. The solid solutions have been prepared via heat treatment of ammonium hydroxycarbonate complexes. The nanoparticles are shown to consist of crystalline rhombohedral α-Al_2–xFe_xO₃, monoclinic and tetragonal (M-ZrO₂ and T-ZrO₂). The synthesized mixed oxide offers a high polishing ability (3 to 4.5 times as high), as demonstrated in polishing of titanium, and ensures surface roughness values Ra ranging between 0.019 and 0.009 μm.

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