Search academic texts

Information × Registration Number 0215U009423, 0115U004309 , R & D reports Title Joint project: Nanostructured anisotropic sintered Sm2Co17-based magnets. Part 1. Optimization parameters of obtaining popup.stage_title Head Bulyk Ihor Ivanovych, Доктор технічних наук Registration Date 20-01-2016 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 The object of the project is peculiarities of milling, under hydrogen, ferromagnetic Sm2(Co,Fe,Zr,Cu)17-based alloy KC25 with different initial phase-structure states. The aim of the project is optimization milling and heat treatment parameters of KC25 alloy with different initial phase-structure states - induction melted, Alloy I, and melt-spined, Alloy S - for achievement of anisotropic fine powders. Milling terms, phase content, morphology and magnetocrystallograthe green samples texture parameter, the composition and crystallographic parameters of the phases and microstructure of sintered samples were investigated by means of differential thermal, X-ray phase, x-ray energy dispersive analyses and electron microscopy. The Alloy I was milled with a frequency 200 and 300 rpm during 1 h and 500 and 600 rpm during 2 h. The Alloy S was milled with a frequency 100, 300 and 600 rpm during 12 h. The Alloy I powder particles are magnetically anisotropic. The anisotropy degree of the Alloy S powder particles decreases with increasing of a frequency. The milled Alloy I disproportionates in hydrogen under pressures 0.5-0.9 MPa and partially oxidize after HDDR. A vacuum treatment at up to 950 °C results in a sintering of the free powders. The construction and sketches of items of an aging chamber for obtaining of anisotropic particles of milled Alloy S were designed. Product Description popup.authors Пилат Михайло Володимирович popup.nrat_date 2020-04-02 Close