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Information × Registration Number 0220U100384, 0119U002322 , R & D reports Title Joint project: Nanostructured anisotropic sintered Sm2Co17-based magnets. Part 1. Optimisation parameters of obtaining popup.stage_title Head Registration Date 17-01-2020 Organization Karpenko Physico-Mechanical Institute of NASU popup.description2  The X-ray diffraction, scanning electron microscopy and X-ray energy dispersion analyses, texture determination by X-ray diffraction method were applied for the detailed studies the conditions of obtaining and properties of a sintered KC25-type industrial ferromagnetic magnets based on Sm2Co17 compound, obtained by melt-spinning method. The influence of: the parameters of grinding of a hydrogen-saturated alloy in a planetary mill in hydrogen, the pressing pressure, the hydrogen pressure and the sintering temperature on the phase composition, texture and microstructure of the sintered materials were studied. The parameters of each stage of producing of sintered magnets were detailed during carrying out of the project stage. It was revealed: 1) the optimal milling parameters are ν=200-300 rpm, τ=2-6 h. The starting ferromagnetic phase remains in powders, the powders are anisotropic and fine dispersive. 2) The green samples, obtained by isostatic pressing under pressure of 2 t/cm2, have the highest anisotropy. It is possible to use pressure up to 5 t/cm2. 3) The samples of sintered nanostructured magnets, with grain size of 50-110 nm and porosity lower than 1%, were obtained. The conditions of sintering in hydrogen by HDDR method were: hydrogen pressure of 1.0-1.2 MPa, temperature of 700°C, hydrogen desorption at temperature of 950°C. Product Description popup.authors Borukh Igor V. Bulyk Igor І. Kononyuk Oleksandr P. Mardarevych Roman S. popup.nrat_date 2020-04-02 Close