Physical and Chemical Geotechnologies

Purpose

Study was to determine the mechanism of formation, physical properties and thermodynamic functions cubicboroncarbideiron Fe²³(CB)⁶[1-3].

Methodology

The study was performed on samples containing carbon 1.0- 4.0% (wt.) and boron 2.0-4.5% (wt.), otheriron. In the work we use differential thermal, metallographic, chemical and X-ray spectroscopic analyses.

Findings

For alloys in the Fe-B-C containing carbon 1.0-4.0% (wt.) and boron 2.0-4.5% (wt.), other iron cubic boron carbide Fe₂₃(CB)₆[1-3], it should be perform pre- processing of the alloy, such as annealing at 1170 K, further heated to a temperature of 30 K above liquidus and then cooled at a speed of 10-100 K/s to room temperature. It is for the first time that using a model which takes into account the contributions of the first high-level approximation of the cubic expansion of the cubic boron carbide Fe₂₃(CB)₆[1-3] thermodynamic depending entropy, enthalpy and heat capacity Ср temperature were obtained

Keywords: boride Fe₂B, eutectics, cubic boron carbide Fe₂₃(CB)₆ and Fe-B- Csystemalloy, Gibbs energy, entropy, enthalpy and heat capacity

References

1. Bereza,O. Yu., Filonenko,N. Yu., Baskevych,O. S(2012) Study of Energy in Communication Formation of Phase Containing Boronin the Alloy Fe-BC Physics and chemistry of solids, 13, 968-973
2. Hiroshi,Ohtani, Mitsuhiro,Hasebe, Taiji,(1988) Nishzawa Calculationof Fe- C-B, Ternary Phase Diagram. Transactions ISIJ, 28, 1043-1050.
3. Filonenko,N. Yu. .(2011) Study of thermodynamic functions of boron- bearing phases for Fе-B-Csystem, Physics and chemistry of solids, 12(2), 370-374.