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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN 印刷: 1093-3611
ISSN オンライン: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.2020033231
pages 9-20

ZrO2/ZrN MULTILAYERS ON BARE SINTERED NdFeB MAGNETS BY ION-PLASMA DEPOSITION WITH PULSED BIASING

A. V. Taran
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
I. E. Garkusha
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine; V.N. Karazin Kharkiv National University, Kharkiv, Ukraine
V. S. Taran
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
O. I. Tymoshenko
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
Ivan O. Misiruk
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
S. P. Romaniuk
Kharkiv Petro Vasylenko National Technical University of Agriculture, Kharkiv, Ukraine
T. V. Mal’tsev
Kharkiv Petro Vasylenko National Technical University of Agriculture, Kharkiv, Ukraine
V. V. Starikov
National Technical University "Kharkiv Polytechnic Institute", Kharkiv, Ukraine
A. A. Baturin
National Technical University "Kharkiv Polytechnic Institute", Kharkiv, Ukraine

要約

Surface modification with nanocrystalline ZrO2/ZrN multilayers was performed on bare sintered NdFeB permanent magnets to improve their corrosion properties. The multilayers were deposited by ion-plasma vacuum-arc evaporation technique with curvilinear magnetic filter reducing amount of macro-particles emitted from cathode spots and using pulsed biasing mode for elimination of micro-arcs formation. The structure, chemical and phase compositions have been investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM) with energy-dispersive X-ray analysis (EDX) and X-ray fluorescence (XRF) methods. Mechanical and tribological properties were evaluated using a ball-on-disc method, Vickers microhardness and nanoindentation tests, respectively. The influence of the obtained coatings in terms of their barrier properties for corrosion in a quasi-physiological 0.9% NaCl solution has been studied. The coating had a thickness of 10 μm and achieved hardness of up to 26-30 GPa. The proposed technology, in particular, would be prospective for application of buffer multilayered coatings on NdFeB magnets used as repelling devices in orthodontics.

参考

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