High-Pressure X-Ray Diffraction Study on Electronic s-d Transition in Zirconium

概要

論文の詳細を見る
High-pressure X-ray diffraction study on the electronic s-d transition in IVa transi-tion metal Zr has been carried out up to 68 GPa. The successive structural transitionsof hcp-hexagonal-bcc were observed at 6.7 GPa and 33 GPa, respectively. Anisostructural transition was also observed in the bcc phase around 56 GPa. The valuesof the isothermal bulk modulus, K., and the pressure derivative of K., A,S, for the hex-agonal phase were calculated to be 121 GPa and 1.69, respectively. Abnormally smallK5 suggests softening in the pressure-volume curve. The atomic volume of the bcc-Zrat the transition pressure of 33 GPa agreed with that of the bcc-Nb at zero pressure.These results suggest that the s-d transition of Zr metal progresses at each pressureand is complete with an isostructural transition at 56 GPa.[pressure-induced phase transition, zirconium, high pressure, X-ray diffraction, l[ s-d transition, isostructural transition, compression curve, bulk modulus %
社団法人日本物理学会の論文
1991-10-15