P-T range surveyed in our experiment.
Variation of c/a ratio of α-hafnium (hcp) unit cell with increasing pressure at two different temperatures.
Representative x-ray diffraction patterns of our sample in several P-T regimes.
Pressure-volume relation of α-phase hafnium at room temperature.
Heat capacity of α-phase hafnium as functions of temperature at several pressures calculated from P-V-T EOS.
Entropy of α-phase hafnium as functions of temperature at several pressures calculated from P-V-T EOS.
P-V-T EOS molar volume calculation errors for the entire P-T range of our experiment.
Comparison of literature reported data on thermal expansion of hafnium and data calculated using our P-V-T EOS. Literature data on thermal expansion of hafnium was included in our P-V-T EOS determination. Superscript (a) in the figure denotes the data points compiled from several literature sources.14,15,17,18
For Group IVB transition metals, γ 0 and δ 0 are seen to decrease with increasing atomic number of element.
The relationship between γ 0 and δ 0 is nearly δ 0 = 2 γ 0, which is consistent with previously reported trend.19
Equation of state parameters for α-phase of hafnium.
Bulk modulus (B 0), and derivative bulk modulus (B 0′), Grüneisen (γ 0) and Anderson-Grüneisen (δ 0) parameters of Group IVB transition metals (Figs. 9 and 10).
Article metrics loading...
Full text loading...