The lattice expansion of iron

Abstract

The lattice spacings of high-purity iron have been measured accurately between 20 and 1502°C. The results, together with previous low-temperature data, give data between the absolute zero and the melting-point (1534°C). The thermal expansion of the lattice and of bulk metal are in good agreement over the temperature range for which the latter has been studied accurately. At the A 2 point, there is no discontinuity in the lattice spacing. In contrast to the work of some previous investigators, we have found no observ­able difference between the coefficients of expansion of the lattice immediately above and below the A 2 point, and the results suggest that the forces responsible for ferromagnetism do not affect the interatomic distances by more than 1 part in 10000. At the A 3 point, the α → γ transformation is accompanied by an increase in the interatomic distance which, when expressed as a percentage change, is slightly less than the decrease in interatomic distance during the γ → δ change at the A 4 point. The change in bond length calculated by the Pauling equation for the change (f. c. c.⇌b. c. c.) lies between the observed values for the A 3 and A 4 points, and the accuracy of the equation is confirmed.

Experimental study of the bcc-fcc phase transformations in the Fe-rich system Fe-Si at high pressures

“…3. Рассчитанный объем железа в сравне-нии с измерениями [Kohlhaas et al, 1967;Basinski et al, 1955]. Fig.…”

“…3. Comparison of the calculated volume of iron with measurements from [Kohlhaas et al, 1967;Basinski et al, 1955]. ) Novikova, 1974bcc-Fe, Lu et al, 2005Komabayashi, Fei, 2010 bcc-Fe Kohlhaas et al, 1967Basinski et al, 1955 bcc-Fe [Isaak, Masuda, 1995;Dever, 1972;Jacobs, Schmid-Fetzer, 2010;Adams et al, 2006].…”

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

“…Meanwhile, by X-ray diffraction technique Basinski et al [46] have determined a phase transition point for a massive iron at 910…”

Nonlocal correlations in the vicinity of the α−γ phase transition in iron within a DMFT plus spin-fermion model approach

“…The Perdew-Burke-Ernzerhof form 25 of GGA was considered. The calculations were carried out with the experimental lattice constant a = 2.91Å for the α phase in the vicinity of the α-γ transition 26 . The lattice constant for the γ phase was set to keep the experimental volume of the unit cell for the α phase.…”