Determination of the phase boundary of the omega to beta transition in Zr using in situ high-pressure and high-temperature X-ray diffraction

作者：Ono Shigeaki^*; Kikegawa Takumi

来源：Journal of Solid State Chemistry, 2015, 225: 110-113.

DOI：10.1016/j.jssc.2014.12.006

• Zirconium
• High pressure
• X-ray diffraction
• Phase transition

The high-pressure behavior of zirconium has been examined using the synchrotron X-ray diffraction technique to a pressure of 38 GPa and a temperature of 800 K employing a hydrothermal diamond anvil cell technique. The structural transition from the omega to the beta phase was observed. This transition has a negative dP/dT gradient, which is in general agreement with those reported in previous studies. The transition boundary was determined to be, P (GPa)=41.2-0.025 x T (K). The negative slope of the transition, dP/dT, determined in our study using the diamond anvil cell technique was less than half that estimated by the previous study using a large press apparatus.

• 出版日期2015-5