LEE, DG KIM, DY JEUNG, WY KANG, IK 2024-01-21T23:07:11Z 2024-01-21T23:07:11Z 2021-09-02 1992-09 0018-9464 https://pubs.kist.re.kr/handle/201004/146398 Microcrystalline Pr-Fe-B powders with high coercivity have been prepared by mechanically milling the as-cast ingot and a subsequent heat treatment. The mechanism responsible for the high coercivity is discussed with the results obtained using a x-ray diffractometer, vibrating sample magnetometer, dc fluxmeter, differential thermal analyzer and transmission electron microscope. The mechanical milling process causes the refinement of Pr2Fe14B, alpha-Fe and Pr rich phases through a process of continuous fracture and cold welding. During heat treatment a new metastable phase and a layered Pr2Fe14B phase are formed at about 420-degrees-C and 480-degrees-C, respectively. The thickness of the multilayer is about 0.1-mu-m. This structure provides the high coercive force of the milled powders after heat treatment. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC SOLID-STATE REACTION PHASES AND MAGNETIC-PROPERTIES OF MECHANICALLY MILLED PR-FE-B-X ALLOYS DURING HEAT-TREATMENT Article 10.1109/20.179425 1 IEEE TRANSACTIONS ON MAGNETICS, v.28, no.5, pp.2148 - 2150 IEEE TRANSACTIONS ON MAGNETICS 28 5 2148 2150 scie scopus A1992JN87700019 2-s2.0-0026911429 Engineering, Electrical & Electronic Physics, Applied Engineering Physics Article; Proceedings Paper SOLID-STATE REACTION 희토류계합금 영구자석 급냉응고 Pr-Fe-B-Zr