Kutsenok Ilya Borisovich.

Phone: 7 - (095)-939-22-80.

FAX: 7 - (095)-939-12-05

E-mail: ibk@td.chem.msu.su

Senior researcher.

Laboratory of Chemical Thermodynamics

Physical Chemistry Division

Chemistry Department

Moscow State University

Main scientific interests:

The study of thermodynamic properties of inorganic substances (mainly metallic alloys) in metastable and non-equilibrium (quenched) states. Measurements of the thermodynamic activity and Gibbs energy of chemical compounds at the low temperatures (about room temperature) by means of the so-called Touch Instant EMF-method, which was developed by us at the beginning of 80-th, were done. The relaxation of many quenched materials does not occur in such conditions.

For the past 5 years we have been studied the thermodynamic properties of martensite and austenite alloys in the system Fe-Ni, amorphous alloys Fe-B, Fe-Cr-B, Fe-Si-B, Co-Fe-Si-B, stable and metastable phases in the system Cd-Sb.

  1. The Gibbs energies of both metastable phases in the Fe-Ni-system - martensite and austenite - were determined. The driving force of the martensitic transformation was calculated. We measured values of Gibbs energy of real quenched samples, which include an excess term in comparison with that in equilibrium alloys. This "non-chemical" term in Gibbs energy connects with the strain in martensite matrix, non-stoichiometric atomic defects, macrodefects of crystalline structure and so on. It was estimated in the wide region of composition. That allows us to obtain more precisely the temperature of martensitic transformation and the conditions of metastable equilibrium in Fe-Ni-system. It was shown also, that for the correct thermodynamic description of non-equilibrium systems it is necessary to use not only external (temperature, composition and so on), but also internal parameters. For example, the mole fraction of residual martensite can be considered as an internal parameter of two-phase martensite-austenite samples.
  2. The concentration dependence of thermodynamic activities of metallic components in amorphous alloys and their alternation during the annealing at the temperatures below crystallisation point in the systems mentioned above were studied. The obtained thermodynamic parameters seem to be the most correct measure of relaxation degree and stability of amorphous alloys. The correlations between thermodynamic properties and such characteristics of amorphous alloys as crystallisation temperature, curie point and others were investigated.
  3. The calculation of thermodynamic properties of supercooled melts Co-B, Fe-B, Co-Si-B and Fe-Si-B was performed on the basis of an ideal and regular association solutions model. Using the data of equilibrium crystal phases in these systems the driving force and enthalpies of crystallisation of amorphous alloys were estimated. The last values are in good agreement with experimental data obtained by DSC and quantitative DTA methods.

Recent Publications:

  1. Goryacheva V.I., Kutsenok I.B., Geiderikh V.A. Stable and metastable phases in the system Cd-Sb. J. of Physical Chemistry (Rus.) 1994, v.68, N 4, p. 23-26
  2. Vasil'eva O.Ya., Kutsenok I.B., Tomilin I.A., Geiderikh V.A. Thermodynamic properties of amorphous alloys of the system Co-Fe-Si-B. J. of Physical Chemistry (Rus.), 1993, v.67, N 6, p. 1153- 1155.
  3. Geiderikh V.A., Kutsenok I.B. The thermodynamic of metallic alloys in non-equilibrium states. J. of Chemical Thermodynamics and Thermochemistry (Rus.), 1992, v.1, N1, p.80-88.
  4. Rostovtsev R.N., Kutsenok I.B., and other, The temperature dependence of thermodynamic properties of iron-nickel alloys with martensite and austenite structure. J. of Physical Chemistry (Rus.), 1990, v.64, p.263-266.
  5. Kornilova E.N., Kutsenok I.B. and other, The thermodynamic properties of amorphous alloys in the system Fe-Cr-B. J. of Physical Chemistry (Rus.), 1990, v.64, N 12 , p.3203-3207.
  6. Kutsenok I.B., and other The thermodynamic stability of amorphous alloys in Fe-B- and Fe-B-Si- systems. J. of Physical Chemistry (Rus.), 1992, v.66, N 12, p.3198-3202.