Search Results - "Ohfuji, H."

Melting temperatures of MgO under high pressure by micro-texture analysis by Kimura, T., Ohfuji, H., Nishi, M., Irifune, T.

“…Periclase (MgO) is the second most abundant mineral after bridgmanite in the Earth’s lower mantle, and its melting behaviour under pressure is important to…”
Get full text

Pressure-induced nano-crystallization of silicate garnets from glass by Irifune, T., Kawakami, K., Arimoto, T., Ohfuji, H., Kunimoto, T., Shinmei, T.

“…Transparent ceramics are important for scientific and industrial applications because of the superior optical and mechanical properties. It has been suggested…”
Get full text

A study of the mechanical properties of an Al–Si–Cu alloy (ADC12) produced by various casting processes by Okayasu, M., Ohkura, Y., Takeuchi, S., Takasu, S., Ohfuji, H., Shiraishi, T.

“…► We examine mechanical properties of Al alloys produced by several casting processes. ► The mechanical properties obtained are different depending on the…”
Get full text

New High‐Pressure Forms of Al2SiO5 by Zhou, Y., Irifune, T., Ohfuji, H., Kuribayashi, T.

“…Phase relations of Al2SiO5 have been studied by multianvil experiments at pressures of 13–23 GPa and temperatures of 2000–2900 K. Al2SiO5 kyanite was found to…”
Get full text

Influence of microstructural characteristics on mechanical properties of ADC12 aluminum alloy by Okayasu, M., Ota, K., Takeuchi, S., Ohfuji, H., Shiraishi, T.

“…The effects of microstructural characteristics on the mechanical properties of an aluminum alloy (ADC12: Al–Si11.3–Cu1.9–Zn0.8–Fe0.8–Mg0.2–Mn0.2) produced by…”
Get full text

Sound velocities of majorite garnet and the composition of the mantle transition region by Irifune, T, Higo, Y, Inoue, T, Kono, Y, Ohfuji, H, Funakoshi, K

“…The composition of the mantle transition region, characterized by anomalous seismic-wave velocity and density changes at depths of ∼400 to 700 km, has remained…”
Get full text

Comparison of enigmatic diamonds from the Tolbachik arc volcano (Kamchatka) and Tibetan ophiolites: Assessing the role of contamination by synthetic materials by Litasov, K.D., Kagi, H., Voropaev, S.A., Hirata, T., Ohfuji, H., Ishibashi, H., Makino, Y., Bekker, T.B., Sevastyanov, V.S., Afanasiev, V.P., Pokhilenko, N.P.

“…The enigmatic appearance of cuboctahedral diamonds in ophiolitic and arc volcanic rocks with morphology and infrared characteristics similar to synthetic…”
Get full text

Reply to the comment on “comparison of enigmatic diamonds from the Tolbachik arc volcano (Kamchatka) and Tibetan ophiolites: Assessing the role of contamination by synthetic materials” by Litasov et al. (2019) (Gondwana research, 75, 16–27) by Yang et al by Litasov, K.D., Bekker, T.B., Kagi, H., Ohfuji, H.

Get full text

Exsolution of Garnet and Clinopyroxene from High-Al Pyroxenes in Xugou Peridotite, Eastern China by Spengler, D., Obata, M., Hirajima, T., Ottolini, L., Ohfuji, H., Tamura, A., Arai, S.

Get full text

Volume and structural study of Fe64Mn36 anti-ferromagnetic Invar alloy under high pressure by Matsushita, M., Nakano, S., Ohfuji, H., Yamada, I., Kikegawa, T.

“…We have investigated the pressure variation of the volume and structure of an FCC Fe64Mn36 anti-ferromagnetic Invar alloy. The inclination of the…”
Get full text

Application of nano-polycrystalline diamond to laser-heated diamond anvil cell experiments by Ohfuji, H., Okada, T., Yagi, T., Sumiya, H., Irifune, T.

“…Laser heating in diamond anvil cell (DAC) equipped with nano-polycrystalline diamond (NPD) anvils was tested for the first time using various types of lasers…”
Get full text

A step toward better understanding of behavior of organic materials at simultaneous high pressures and high temperatures by Chertkova, N., Ohfuji, H., Nomura, R., Kadobayashi, H., Irifune, T.

“…Using an external heating system, specifically designed for the lever-type diamond anvil cell, we investigated for the first time the phase relationships in…”
Get full text

Experimental syntheses of framboids—a review by Ohfuji, Hiroaki, Rickard, David

“…Eleven reported laboratory syntheses of pyrite framboids are critically reviewed. Pyrite framboids are defined as microscopic spheroidal to sub-spheroidal…”
Get full text

New High‐Pressure Forms of Al 2 SiO 5 by Zhou, Y., Irifune, T., Ohfuji, H., Kuribayashi, T.

“…Abstract Phase relations of Al 2 SiO 5 have been studied by multianvil experiments at pressures of 13–23 GPa and temperatures of 2000–2900 K. Al 2 SiO 5…”
Get full text

Structure and stability of carbon nitride under high pressure and high temperature up to 125 GPa and 3000 K by KOJIMA, Yohei, OHFUJI, Hiroaki

“…The crystal structure of carbon nitride under high pressure and temperature was investigated up to megabar pressures using graphitic C sub(3)N sub(4) as a…”
Get full text

High resolution transmission electron microscopic study of synthetic nanocrystalline mackinawite by Ohfuji, Hiroaki, Rickard, David

“…Direct observation using high resolution transmission electron microscopy reveals that precipitated iron(II) monosulfide, FeS, consists of nanocrystalline…”
Get full text

Towards the investigation of ternary compound in the Ti-Al-Zr-O system: Effect of oxygen fugacity on phase formation by Bekker, T.B., Litasov, K.D., Shatskiy, A.F., Sagatov, N.E., Krinitsin, P.G., Krasheninnikov, S.P., Podborodnikov, I.V., Rashchenko, S.V., Davydov, A.V., Ohfuji, H.

“…The Ti-Al-Zr-O system has received significant attention as it hosts a variety of phases of industrial interest. In this paper, new experiments on the…”
Get full text

TRANSPARENT NANOCRYSTALLINE BULK ALUMINA OBTAINED AT 7.7 GPa AND 800 C by Nishiyama, N, Taniguchi, T, Ohfuji, H, Yoshida, K, Wakai, F, Kim, B-N, Yoshida, H, Higo, Y, Holzheid, A, Beermann, O, Irifune, T, Sakka, Y, Funakoshi, K-i

“…Transparent nanocrystalline bulk alumina obtained at 7.7 GPa and 800 C had an average grain size of about 150 nm and an in-line transmission of 71% for a…”
Get full text

Erratum to “Volume and structural study of Fe64Mn36 anti-ferromagnetic Invar alloy under high pressure” [J. Magn. Magn. Mater. 323 (6) (2011) 838–841] by Matsushita, M., Nakano, S., Ohfuji, H., Yamada, I., Kikegawa, T.

Get full text

Mineralogical and geomicrobiological investigations on groundwater arsenic enrichment in Bangladesh by Akai, Junji, Izumi, Kaoru, Fukuhara, Haruo, Masuda, Harue, Nakano, Satoshi, Yoshimura, Takahisa, Ohfuji, Hiroaki, Md Anawar, Hossain, Akai, Kurumi

“…Sources of As in the Ganges sediments and microbial mechanisms of its release in groundwater were examined in the present study, where the authors have…”
Get full text