Institution
Fukuoka University of Education
Education•Munakata, Japan•
About: Fukuoka University of Education is a education organization based out in Munakata, Japan. It is known for research contribution in the topics: Superplasticity & Severe plastic deformation. The organization has 394 authors who have published 809 publications receiving 16662 citations.
Papers published on a yearly basis
Papers
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TL;DR: Simulations of the behaviour of water encapsulated in carbon nanotubes suggest the existence of a variety of new ice phases not seen in bulk ice, and of a solid–liquid critical point beyond which the distinction between solid and liquid phases disappears.
Abstract: Following their discovery1, carbon nanotubes have attracted interest not only for their unusual electrical and mechanical properties, but also because their hollow interior can serve as a nanometre-sized capillary2,3,4,5,6,7, mould8,9,10,11 or template12,13,14 in material fabrication. The ability to encapsulate a material in a nanotube also offers new possibilities for investigating dimensionally confined phase transitions15. Particularly intriguing is the conjecture16 that matter within the narrow confines of a carbon nanotube might exhibit a solid–liquid critical point17 beyond which the distinction between solid and liquid phases disappears. This unusual feature, which cannot occur in bulk material, would allow for the direct and continuous transformation of liquid matter into a solid. Here we report simulations of the behaviour of water encapsulated in carbon nanotubes that suggest the existence of a variety of new ice phases not seen in bulk ice, and of a solid–liquid critical point. Using carbon nanotubes with diameters ranging from 1.1 nm to 1.4 nm and applied axial pressures of 50 MPa to 500 MPa, we find that water can exhibit a first-order freezing transition to hexagonal and heptagonal ice nanotubes, and a continuous phase transformation into solid-like square or pentagonal ice nanotubes.
998 citations
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15 Dec 1998-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the authors examined the shearing characteristics associated with ECA pressing for six different processing routes and reached conclusions concerning the optimum processing procedure and the development of texture in equal channel angular (ECA) pressing.
Abstract: Equal-channel angular (ECA) pressing is a processing method for introducing an ultra-fine grain size into a material. In practice, it is a procedure that may be used to achieve high total strains by subjecting a sample to repetitive pressings. There is experimental evidence showing that the nature of the microstructural evolution in ECA pressing depends upon whether the sample is rotated between each passage through the die. This paper examines the shearing characteristics associated with ECA pressing for six different processing routes and reaches conclusions concerning the optimum processing procedure and the development of texture.
854 citations
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TL;DR: The reaction of K 3 [Cr(ox) 3 ].3H 2 O, a metal(II) salt, and tetra(n-butyl)ammonium bromide in the molar ratio of 1:1:1.5 in water at room temperature afforded a series of mixed-metal assemblies with the formula {NBu 4 [MCr(ox), 3 ]} x (M=Mn 2+, Fe 2+, Co 2+
Abstract: The reaction of K 3 [Cr(ox) 3 ].3H 2 O, a metal(II) salt, and tetra(n-butyl)ammonium bromide in the molar ratio of 1:1:1.5 in water at room temperature afforded a series of mixed-metal assemblies with the formula {NBu 4 [MCr(ox) 3 ]} x (M=Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ ).
731 citations
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TL;DR: In this article, the principles of the ECAP process are examined with reference to the distortions introduced into a sample as it passes through an ECAP die and especially the effect of rotating the sample between consecutive presses.
Abstract: Equal-channel angular pressing (ECAP) is a processing method in which a metal is subjected to an intense plastic straining through simple shear without any corresponding change in the cross-sectional dimensions of the sample. This procedure may be used to introduce an ultrafine grain size into polycrystalline materials. The principles of the ECAP process are examined with reference to the distortions introduced into a sample as it passes through an ECAP die and especially the effect of rotating the sample between consecutive presses. Examples are presented showing the microstructure introduced by ECAP and the consequent superplastic ductilities that may be attained at very rapid strain rates.
396 citations
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TL;DR: Experiments were conducted to evaluate the grain refinement introduced by equal-channel angular pressing (ECAP) in three different Al-3% Mg alloys containing either 2% Sc, 2% Zr or a combination of 2%Sc and Zr as mentioned in this paper, but superplasticity was not achieved in the Al-Mg-Zr alloy due to the onset of rapid grain growth at 573 K.
310 citations
Authors
Showing all 396 results
Name | H-index | Papers | Citations |
---|---|---|---|
Terence G. Langdon | 117 | 1158 | 61603 |
Ruslan Z. Valiev | 99 | 835 | 49839 |
Zenji Horita | 90 | 597 | 31524 |
Yoshio Takahashi | 50 | 403 | 9801 |
Tetsuo Hasegawa | 46 | 210 | 6347 |
Hironobu Fujii | 45 | 455 | 8343 |
Minoru Nemoto | 43 | 159 | 11627 |
Minoru Furukawa | 41 | 117 | 7474 |
Hideki Tanaka | 39 | 121 | 6260 |
Muneyuki Date | 36 | 295 | 4644 |
Yasuhito Osanai | 32 | 182 | 3287 |
Kenichiro Koga | 25 | 95 | 3733 |
Tetsuhiko Okamoto | 23 | 106 | 1564 |
Masayuki Maki | 22 | 136 | 1571 |
Katsuji Ito | 21 | 51 | 971 |