SPring-8 Beamlines for High Pressure Science with Multi-Anvil Apparatus.

Utsumi, Wataru; Funakoshi, K.; Urakawa, Satoru; Yamakata, Masaaki; Tsuji, Kazuhiko; Konishi, Hisatoshi; Shimomura, Osamu

doi:10.4131/jshpreview.7.1484

Cited by 154 publications

(54 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most common pressure device is a diamond-anvil cell, capable of reaching pressures up to 200 GPa and temperatures up to 5000 K [44]; however, with a maximum diameter of~0.2 mm, the total volume of samples is limited. On the other hand, large-volume multi-anvil cells can be used for samples up to an 8-mm side length, with compromises on the maximum achievable pressure of up to approximately 30-50 GPa [45,46], but more typically in the 10-GPa range. Heating can be achieved by building furnaces into the hydrostatic volume, resulting in available sample volumes of 1-2 mm 3 .…”

Section: Introductionmentioning

confidence: 99%

Hydrostatic Compression Behavior and High-Pressure Stabilized β-Phase in γ-Based Titanium Aluminide Intermetallics

Liss

Funakoshi

Dippenaar

et al. 2016

Metals

View full text Add to dashboard Cite

Titanium aluminides find application in modern light-weight, high-temperature turbines, such as aircraft engines, but suffer from poor plasticity during manufacturing and processing. Huge forging presses enable materials processing in the 10-GPa range, and hence, it is necessary to investigate the phase diagrams of candidate materials under these extreme conditions. Here, we report on an in situ synchrotron X-ray diffraction study in a large-volume press of a modern (α 2 + γ) two-phase material, Ti-45Al-7.5Nb-0.25C, under pressures up to 9.6 GPa and temperatures up to 1686 K. At room temperature, the volume response to pressure is accommodated by the transformation γ → α 2 , rather than volumetric strain, expressed by the apparently high bulk moduli of both constituent phases. Crystallographic aspects, specifically lattice strain and atomic order, are discussed in detail. It is interesting to note that this transformation takes place despite an increase in atomic volume, which is due to the high ordering energy of γ. Upon heating under high pressure, both the eutectoid and γ-solvus transition temperatures are elevated, and a third, cubic β-phase is stabilized above 1350 K. Earlier research has shown that this β-phase is very ductile during plastic deformation, essential in near-conventional forging processes. Here, we were able to identify an ideal processing window for near-conventional forging, while the presence of the detrimental β-phase is not present under operating conditions. Novel processing routes can be defined from these findings.

show abstract

Section: Introductionmentioning

confidence: 99%

Hydrostatic Compression Behavior and High-Pressure Stabilized β-Phase in γ-Based Titanium Aluminide Intermetallics

Liss

Funakoshi

Dippenaar

et al. 2016

Metals

View full text Add to dashboard Cite

show abstract

“…Experiments were carried out using an X-ray radiography technique (Kanzaki et al, 1987) together with Kawai-type, double-stage, multianvil system driven by DIA-type cubic press (SPEED-1500) installed at BL04B1 (Utsumi et al, 1998), SPring-8, Japan. A direct white X-ray beam, which passes through the anvil gaps of SPEED-1500 and the sample under high pressure, was observed with an X-ray camera (Fig.…”

Section: Methodsmentioning

confidence: 99%

Determination of the second critical end point in silicate-H2O systems using high-pressure and high-temperature X-ray radiography

Mibe

Kanzaki

Kawamoto

et al. 2004

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

“…In situ X-ray diffraction (XRD) measurements with the synchrotron radiation were carried out using white X-rays and the energy-dispersive method with a Ge solidstate detector and a horizontal goniometer [Utsumi et al, 1998]. In the in situ high P-T experiments, Au was employed as an internal pressure standard and the equation of state of Tsuchiya [2003] was used as the pressure scale.…”

Section: Methodsmentioning

confidence: 99%

Phase relations in the system MgO‐FeO‐SiO₂ to 50 GPa and 2000°C: An application of experimental techniques using multianvil apparatus with sintered diamond anvils

Tange¹,

Takáhashi²,

Nishihara³

et al. 2009

J. Geophys. Res.

View full text Add to dashboard Cite

[1] Phase relations in the system MgO-FeO-SiO 2 were investigated between 22 and 47 GPa at 1500°C and 2000°C using multianvil apparatus with sintered diamond anvils. Synthesized samples were analyzed with electron microprobe, analytic transmission electron microscopy, and X-ray diffraction using synchrotron radiation. Univariant compositions of (Mg,Fe)SiO 3 perovskite and (Mg,Fe)O magnesiowüstite coexisting with SiO 2 stishovite were determined as functions of pressure and temperature. The maximum iron solubility in perovskite corresponding to the univariant composition gradually increases with increasing pressure and temperature to be more than 30 mol % at 2000°C and pressures above 40 GPa, and a significant pressure effect was found in Fe-Mg partitioning between perovskite and magnesiowüstite in pressures between 22 and 35 GPa. The iron content of magnesiowüstite dramatically increases from 50 to greater than 90 mol % with increasing pressure, and the Fe-Mg distribution coefficients between perovskite and magnesiowüstite, K D = (X Fe Pv /X Mg Pv )/(X Fe Mw /X Mg Mw ), decrease to less than 0.05. This significant pressure effect in Fe-Mg partitioning causes strong concentration of ferrous iron in magnesiowüstite with increasing depth in the lower mantle.

show abstract

SPring-8 Beamlines for High Pressure Science with Multi-Anvil Apparatus.

Cited by 154 publications

References 0 publications

Hydrostatic Compression Behavior and High-Pressure Stabilized β-Phase in γ-Based Titanium Aluminide Intermetallics

Hydrostatic Compression Behavior and High-Pressure Stabilized β-Phase in γ-Based Titanium Aluminide Intermetallics

Determination of the second critical end point in silicate-H2O systems using high-pressure and high-temperature X-ray radiography

Phase relations in the system MgO‐FeO‐SiO₂ to 50 GPa and 2000°C: An application of experimental techniques using multianvil apparatus with sintered diamond anvils

Contact Info

Product

Resources

About

SPring-8 Beamlines for High Pressure Science with Multi-Anvil Apparatus.

Cited by 154 publications

References 0 publications

Hydrostatic Compression Behavior and High-Pressure Stabilized β-Phase in γ-Based Titanium Aluminide Intermetallics

Hydrostatic Compression Behavior and High-Pressure Stabilized β-Phase in γ-Based Titanium Aluminide Intermetallics

Determination of the second critical end point in silicate-H2O systems using high-pressure and high-temperature X-ray radiography

Phase relations in the system MgO‐FeO‐SiO2 to 50 GPa and 2000°C: An application of experimental techniques using multianvil apparatus with sintered diamond anvils

Contact Info

Product

Resources

About

Phase relations in the system MgO‐FeO‐SiO₂ to 50 GPa and 2000°C: An application of experimental techniques using multianvil apparatus with sintered diamond anvils