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| Description
| - The low corrosion resistance of Nd-Fe-B magnets in humid environments determines the necessity for their protection with anticorrosive coatings. In the present work, the microstructure and compositions of Nd-Fe-B-based magnet produced by powder-metallurgy and Al-Zn protective coating applied by cold gas-dynamic sputtering on the magnet surface were studied by optical and electron microscopy and EDS microanalysis. The base material was formed by sintered (polyhedron) grains of the principal Nd2Fe14B phase and it contains pores and minority phases. The fractographic analysis confirmed intercrystalline brittle fracture. The distribution of elements along the coating thickness was studied by glow-discharge spectroscopy. On the basis of potentiodynamic polarization method, the corrosion parameters of stated materials, commercially zinc-coated steel, zinc and aluminium were determined and compared, especially with respect to pitting corrosion in NaCl water solution. Protective coatings were applied on the surface of Nd2Fe14B-based permanent magnets also by electrochemical deposition (electroplating); the efficiency of different coatings was estimated under conditions of both high humidity and temperature and salt vapour (mist) using a standard testing equipment. The corrosion of Russian and Chinese permanent magnets with various protective coatings was studied. The highest corrosion resistance was found for the Russian permanent magnets with anticorrosive Al-Zn coating applied by cold gas-dynamic sputtering.
- The low corrosion resistance of Nd-Fe-B magnets in humid environments determines the necessity for their protection with anticorrosive coatings. In the present work, the microstructure and compositions of Nd-Fe-B-based magnet produced by powder-metallurgy and Al-Zn protective coating applied by cold gas-dynamic sputtering on the magnet surface were studied by optical and electron microscopy and EDS microanalysis. The base material was formed by sintered (polyhedron) grains of the principal Nd2Fe14B phase and it contains pores and minority phases. The fractographic analysis confirmed intercrystalline brittle fracture. The distribution of elements along the coating thickness was studied by glow-discharge spectroscopy. On the basis of potentiodynamic polarization method, the corrosion parameters of stated materials, commercially zinc-coated steel, zinc and aluminium were determined and compared, especially with respect to pitting corrosion in NaCl water solution. Protective coatings were applied on the surface of Nd2Fe14B-based permanent magnets also by electrochemical deposition (electroplating); the efficiency of different coatings was estimated under conditions of both high humidity and temperature and salt vapour (mist) using a standard testing equipment. The corrosion of Russian and Chinese permanent magnets with various protective coatings was studied. The highest corrosion resistance was found for the Russian permanent magnets with anticorrosive Al-Zn coating applied by cold gas-dynamic sputtering. (en)
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| Title
| - Structural and Corrosion Properties of Al-Zn Protective Coating for Nd-Fe-B Permanent Magnets
- Structural and Corrosion Properties of Al-Zn Protective Coating for Nd-Fe-B Permanent Magnets (en)
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| skos:prefLabel
| - Structural and Corrosion Properties of Al-Zn Protective Coating for Nd-Fe-B Permanent Magnets
- Structural and Corrosion Properties of Al-Zn Protective Coating for Nd-Fe-B Permanent Magnets (en)
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| skos:notation
| - RIV/61989100:27360/11:86081144!RIV12-MSM-27360___
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| http://linked.open...avai/predkladatel
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61989100:27360/11:86081144
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - NdFeB magnets; protective Coating; corrosion; Structure (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Konečná, Kateřina
- Kursa, Miroslav
- Lasek, Stanislav
- Belyaev, Igor
- Kolchugina, Natalia
- Sprygin, Georgii
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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| is http://linked.open...avai/riv/vysledek
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