Hyperfine Structure and Electrochemical Behavior of FeCrNi Alloys

O. V. Kasparova^a and Yu. V. Baldokhin^b

^a Karpov Institute of Physical Chemistry, Vorontsovo Pole 10, Moscow, 105064 Russia

^b Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, 119991 Russia

e-mail: Этот e-mail защищен от спам-ботов. Для его просмотра в вашем браузере должна быть включена поддержка Java-script

Received June 10, 2008

Abstract — With the use of nuclear -resonance Mössbauer spectroscopy, the hyperfine structure of quenched (1100C, 1 h, water) Fe~20% Cr–(9.6, 40.8, 70.7)% Ni alloys is studied. With the Normos program package, the isomer (chemical) shift (mm/s) of the singlet and doublet signals, the half-width (mm/s) of the singlet and doublet spectral components, the area part S (%) of the components in the general spectra, and the probability distribution function of hyperfine magnetic fields P(H_eff) are calculated. The effect of nickel on the electron density distribution around ⁵⁷Fe nuclei is discovered. Novel data on the presence of ferromagnetic phases, their nuclei and clusters in Fe–19.6% Cr–9.6% Ni are obtained. The data of Mössbauer spectroscopy are compared to the anodic polarization curves recorded in a 1 N H₂SO₄ solution with the aim to clarify the relation between the electronic structure and electrochemical behavior of alloys

PACS numbers: 76.80.+y; 82.45.Bb