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Dive into the research topics where Shozo Kishimoto is active.

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Featured researches published by Shozo Kishimoto.


Acta Metallurgica | 1983

Solvus thermodynamics of metal-hydrogen interstitial solutions

Ted B. Flanagan; W.A. Oates; Shozo Kishimoto

Abstract Thermodynamic equations are derived relating the solvus properties of metal-hydrogen interstitial solutions which form hydride phases to single phase and two solid phase thermodynamic parameters and to standard thermodynamic reaction parameters. The role of non-ideality is examined. The influences of stress, alloying and traps on solvus properties are discussed.


Journal of The Less Common Metals | 1982

Hydride precipitation in palladium and its alloys

Shozo Kishimoto; W.A. Oates; Ted B. Flanagan

Abstract It is known from thermodynamic arguments that solvus determinations can be employed for the evaluation of standard thermodynamic parameters for hydride precipitation from the dilute solution in the limit as the solvus composition tends to zero. In this research a detailed experimental evaluation was made of the actual experimental conditions under which solvus data can be considered to be close enough to the limiting infinitely dilute composition to extract useful standard thermodynamic data for the precipitation reaction. Detailed solvus and thermodynamic data are presented for Pd-H (200–273 K). The effects of alloying palladium on its solvus properties are examined. Substitutional silver increases the stability of the hydride phase and rhodium decreases its stability relative to the gaseous state, but both elements are found to decrease hydride stability relative to the dilute phase. The effect of non-ideality is greater for the alloys than for Pd-H in the same temperature range. The effect of non-ideality on the solvus properties of the alloys is evaluated.


Journal of the Chemical Society, Faraday Transactions | 1986

Solution of hydrogen in thin palladium films

Shozo Kishimoto; Minoru Inoue; Noritetsu Yoshida; Ted B. Flanagan

Solubility enhancements have been observed for hydrogen in thin Pd films (250–820 A) in the αphase. Thermodynamic data for the films are determined from isotherms at temperatures between 25 and –40 °C and are compared with those for bulk Pd. From the values of WH—H(interaction energy of hydrogen in the film) and the solvus behaviour, it is suggested that the hydride phase in the films is destabilized relative to the dilute phase as the film thickness decreases. The dependence of the solubility on annealing has been examined for a thin film. The results indicate that the special characteristics of thin films disappear after annealing at ca. 400 °C.


Scripta Metallurgica Et Materialia | 1994

Dislocation-enhanced hydrogen solubilities in Pd-Ni, Pd-Ag and Pd-Ni-Ag alloys

Shozo Kishimoto; Noritetsu Yoshida; T. Hiratsuka; A. Nakano; T. Masui; Ted B. Flanagan

The purpose of this communication is to determine whether the solubility enhancements for cold-worked Pd-Ni alloys increase or decrease with atom fraction of Ni. Substitutional Ni atoms contract and Pd lattice, in contrast to the lattice expansion resulting from substitutional Ag in Pd. The Pd-Ni alloy system forms a continuous series of fcc solid solution alloys over the whole composition range. The solubility enhancements will also be determined for a series of homogeneous, ternary Pd[sub 1[minus]x]Ni[sub 1/2x]Ag[sub 1/2x] alloys for x in the range from 0 to 0.2. For this series of ternary alloys the fcc lattice parameters do not change significantly from that of pure Pd. The alloys used in this research were purchased from Tanaka Kikinzoku Kogyo K.K. The detailed experimental procedure has been described previously. The alloys were all deformed by cold-rolling ca 90%. Both the binary and ternary alloys showed only single sets of fcc lattice parameters corresponding to homogeneous fcc solid solutions.


Journal of the Chemical Society, Faraday Transactions | 1989

Solution of hydrogen in thin films of a palladium–silver alloy

Shozo Kishimoto; Noritetsu Yoshida; Tadashi Tanabe; Ted B. Flanagan

The absorption of hydrogen in evaporated Pd–Ag (5–7 atom % Ag) films with thicknesses of 360, 1150 and 2160 A has been studied volumetrically from –40 °C to room temperature. Thermodynamic parameters in the range of the α-phase have been determined for the films and are compared with those for bulk alloys. It is found that the hydrogen solubilities in the films are larger than in the bulk alloys, and these tend to increase with decreasing film thickness. The absolute values of WHH(the interaction energy of dissolved hydrogen) for the films are much smaller than those for the bulk alloys, and these values are found to increase with an increase in the film thickness. It is suggested that the solubility enhancement in the α-phase and the weakening of H–H interactions are mainly caused by stresses which are created during the deposition of the films.


Perspectives in Hydrogen in Metals#R##N#Collected Papers on the Effect of Hydrogen on the Properties of Metals and Alloys | 1986

SOLVUS THERMODYNAMICS OF METAL–HYDROGEN INTERSTITIAL SOLUTIONS

Ted B. Flanagan; W.A. Oates; Shozo Kishimoto

Thermodynamic equations are derived relating the solvus properties of metal-hydrogen interstitial solutions which form hydride phases to single phase and two solid phase thermodynamic parameters and to standard thermodynamic reaction parameters. The role of non-ideality is examined. The influences of stress, alloying and traps on solvus properties are discussed.


Bulletin of the Chemical Society of Japan | 1985

Structural and compositional changes of blue orthorhombic hydrogen molybdenum bronze, H0.30MoO3, by vacuum heating and catalytic activity for 1-butene isomerization.

Noriyuki Sotani; Noritetsu Yoshida; Yukio Yoshioka; Shozo Kishimoto


Bulletin of the Chemical Society of Japan | 1984

Decomposition of Blue Orthorhombic Hydrogen Molybdenum Bronze, H0.30MoO3, by Heating in vacuo and in Helium Gas

Noriyuki Sotani; Noritetsu Yoshida; Yoji Kawamoto; Shozo Kishimoto; Masatomo Hasegawa


Scripta Metallurgica | 1982

Relationships between thermal, solvus and plateau pressure hysteresis for metal hydrides

Ted B. Flanagan; W.A. Oates; Shozo Kishimoto


ChemInform | 1990

Solution of Hydrogen in Cold‐Worked and Annealed Pd95Ag5 Alloys

Shozo Kishimoto; Noritetsu Yoshida; Yoshitaka Arita; Ted B. Flanagan

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W.A. Oates

University of Newcastle

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