title: Titanium boride equation of state determined by in-situ X-ray diffraction.
abstract: The equation of state (EOS) of titanium boride, TiB2, was investigated by in situ X-ray diffraction in a diamond anvil cell and multianvil high-pressure apparatus. The pressure-volume-temperature (P-V-T) data were collected at up to 111 GPa and room temperature for the diamond-anvil cell experiments and at up to 15 GPa and 1300 K for the multianvil experiments. No phase transition was observed through the entire range of experimental conditions. The pressure-volume data at room temperature were fitted using a Vinet EOS to obtain the isothermal bulk modulus,BT0= 256.7 GPa, and its pressure derivative,B'T0= 3.83. When fitting a thermal EOS using theP-V-Tdata for the multianvil experiments, we find that [Formula: see text] = 0.095 (GPa/K) and α0= 2.49 × 10-5K-1.
authors.affiliation: Research and Development Center for Ocean Drilling Science, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan.
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Ono
authors.affiliation: High Energy Acceleration Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Kikegawa
keywords: Condensed Matter Physics; Materials Science