Faculty Profiles - TERASAKI Hidenori

Papers - TERASAKI Hidenori

Division display 141 - 148 of about 148 ／ All the affair displays >>

Radiographic study on the viscosity of the Fe-FeS melts at the pressure of 5 to 7 GPa Reviewed

S Urakawa, H Terasaki, K Funakoshi, T Kato, A Suzuki

AMERICAN MINERALOGIST 86 ( 4 ) 578 - 582 2001.4

Language：English Publishing type：Research paper (scientific journal) Publisher：MINERALOGICAL SOC AMER

Stokes' viscometry combined with in situ X-ray radiographic observation, using the 6-8 type multi-anvil press and synchrotron radiation, has been applied to the viscosity measurement of the Fe-FeS melt up to pressures of 7 GPa. The viscosity is found to be about 2 x 10(-2) Pa-s at 5 to 7 GPa and temperatures about 1350 K, in marked contrast to previous viscosity measurements, which showed high viscosity, 0.5 to 14 Pa-s, at 2 to 5 GPa (LeBlanc and Secco 1996). Our viscosity data, however, is consistent with all other evidence, which include 1 atm viscosity data, X-ray structure analysis, and ab initio simulations. Recent viscosity measurements (Dobson et al. 2000) also showed the viscosity of Fe-FeS melt to be about 10(-2) Pa-s at 2.5 GPa. Thus, we are confident that the viscosity of the Fe-FeS melt is close to a typical value (10(-2) Pa-s) of viscosity for liquid metal even at high pressures.

Web of Science

researchmap

マルチアンビルを用いた高温高圧実験－手段と装置－ Reviewed

舟越賢一, 内海渉, 大高理, 入舩徹男, 井上徹, 伊藤英司, 桂智男, 久保敦, 廣瀬敬, 安藤淳一, 鈴木昭夫, 久保友明, 寺崎英紀

岩石鉱物科学 30 100 - 101 2001

In situ determination of the phase boundary between wadsleyite and ringwoodite in Mg2SiO4 Reviewed

A Suzuki, E Ohtani, H Morishima, T Kubo, Y Kanbe, T Kondo, T Okada, H Terasaki, T Kato, T Kikegawa

GEOPHYSICAL RESEARCH LETTERS 27 ( 6 ) 803 - 806 2000.3

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER GEOPHYSICAL UNION

The phase boundary between wadsleyite and ringwoodite in Mg2SiO4 composition was determined by in situ observation using synchrotron X-ray and multi anvil apparatus:in KEK, Tsukuba, Japan. An energy dispersive method:was employed using the Ge solid state detector and the white X-ray beam from the synchrotron radiation source. The pressure was determined by the equation of state of NaCl. The stability field was identified by the change in intensities of diffraction lines of each phases. As a result, the phase boundary is expressed as a linear equation P=10.32(28)+0.00691(9)xT, where P is pressure in gigapascals and T is temperature in degrees Celsius.

DOI： 10.1029/1999GL008425

Web of Science

CiNii Article

researchmap

Pictorial 3 : Large Volume High Pressure and High Temperature Apparatus Used for Synchrotron X-ray In-situ Observation

KATO Takumi, TERASAKI Hidenori, KUBO Tomoaki

J. Geogr. 109 ( 6 ) Plate5 - Plate5 2000