Institute of Physics, M. Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland
Constantin Virgil C.
Department of Molten Salts, “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, 202 Splaiul Independentei Str., Bucharest, Romania
Popescu Ana-Maria J.
Department of Molten Salts, “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, 202 Splaiul Independentei Str., Bucharest, Romania
Surowiec Zbigniew
Institute of Physics, M. Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland
Tkachenka Tamara M.
Scientific-Practical Materials Research Center of National Academy of Sciences of Belarus, 19 P. Brovky Str., Minsk, 220072 Belarus, Tel.: +375 17 284 1301, Fax: +375 17 284 1558
Yanushkevich Kazimir I.
Scientific-Practical Materials Research Center of National Academy of Sciences of Belarus, 19 P. Brovky Str., Minsk, 220072 Belarus, Tel.: +375 17 284 1301, Fax: +375 17 284 1558
The Nd2Fe14B cylindrical magnets were treated with water solutions of alkali, acid, and salt. Mössbauer spectroscopy was applied to study the composition and properties of the surface material of the treated magnets. It is shown that the main phase of the permanent Nd2Fe14B magnet partly decomposes. The released α-Nd at the grain boundaries interacts with water and forms neodymium hydroxide matrix, and the released Fe diffuses into it. The presence of Fe-Nd(OH)3 is reflected in the paramagnet doublet in the Mössbauer spectra of treated neodymium magnets.
