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Hishinuma Y.,Japan National Institute for Fusion Science | Tanaka T.,Toshima Manufacturing Company Ltd | Tanaka T.,Japan National Institute for Fusion Science | Nagasaka T.,Japan National Institute for Fusion Science | And 3 more authors.
Fusion Engineering and Design | Year: 2011

The electrical insulating coating on the blanket components such as ducts and walls is an attractive concept for reducing the Magneto Hydrodynamic (MHD) pressure drop. Erbium oxide (Er2O3) is a promising candidate coating because of its high stability in liquid lithium and high electrical resistivity according to the results of Er2O3 bulk and Physical Vapor Deposition (PVD) thin film. We have investigated the Metal Organic Chemical Vapor Deposition (MOCVD) process for the large area and complicatedly shaped Er2O3 coating. The Er 2O3 insulator coating formation on the various metal disk substrates was successfully carried out. The crystallinity of the Er 2O3 coating on the metal substrate increased with the decrease in the surface roughness of the metal substrate and, thus, the crystallinity of the coating can be improved by reducing the roughness of the substrate surface. Furthermore, the Er2O3 coating into the interior surface of the honing SUS pipe, whose interior surface was polished by rotating grinding and brush, was formed stably through the MOCVD process. © 2011 Elsevier B.V. All rights reserved.

Yoshimatsu K.,Tokyo Institute of Technology | Suzuki T.,Tokyo Institute of Technology | Tsuchimine N.,Toshima Manufacturing Company Ltd | Horiba K.,High Energy Accelerator Research Organization | And 5 more authors.
Applied Physics Express | Year: 2015

We report the layer-by-layer growth and electronic properties of (111)-oriented, nearly stoichiometric TiH2 films (δ-phase) pulsed-laser-deposited on α-Al2O3(0001) using a TiH2 ceramic target. The content of the δ-phase increased as the decomposition to the Ti metal was suppressed at low temperatures. Moreover, long-lasting oscillations of reflection high-energy electron diffraction intensity were observed during the initial growth of the δ-phase film. The film showed metallic conductivity down to low temperatures. The results of Ti 2p-3d resonant photoemission spectroscopy and Hall measurement were consistent with those of the conducting electrons residing in the Ti 3d states. © 2015 The Japan Society of Applied Physics.

Shiojiri D.,Tokyo Institute of Technology | Yamauchi R.,Tokyo Institute of Technology | Fukuda D.,Tokyo Institute of Technology | Tsuchimine N.,Toshima Manufacturing Company Ltd | And 4 more authors.
Journal of Crystal Growth | Year: 2015

Highly oriented crystalline Ga2O3 thin films were fabricated at room temperature (RT) by excimer laser annealing. Amorphous Ga2O3 thin films were grown on α-Al2O3 (0001) substrates at RT by the pulsed laser deposition method using a focused KrF excimer laser and a sintered β-Ga2O3 target. Amorphous precursor films were irradiated by a non-focused KrF excimer laser (100-250 mJ/cm2) at RT. The results of x-ray and reflection high-energy electron diffraction measurements indicated that highly (101)-oriented crystalline β-Ga2O3 thin films were obtained after RT laser annealing. The optical bandgaps of the crystalline thin films were approximately 4.7-4.9 eV, as determined from the UV/Vis transmittance. The film surfaces after laser annealing revealed slight planar grain growth, indicating a high degree of crystallinity and showed the root mean square roughnesses of 0.28-0.48 nm. © 2015 Elsevier B.V. All rights reserved.

Hishinuma Y.,Japan National Institute for Fusion Science | Murakami S.,University of Toyama | Matsuda K.,University of Toyama | Tanaka T.,Toshima Manufacturing Company Ltd | And 5 more authors.
Plasma and Fusion Research | Year: 2012

Erbium oxide (Er2O3) was shown to be a high potential candidate for tritium permeation barrier and electrical insulator coating for advanced breeding blanket systems such as liquid Li, Li-Pb or molten-salt blankets. Recently, we succeeded to form Er2O3 coating layer on large interior surface area of metal pipe using Metal Organic Chemical Vapor Deposition (MOCVD) process. In this paper, we investigated the microstructure of Er2O3 coating layer on stainless steel 316 (SUS 316) plate before and after heat treatments with hydrogen or argon gases. From the results of TEM observations, we confirmed that Er2O3 coating layer with 700 nm thickness was formed on the SUS 316 plate and this layer was identified to poly-crystal phase because the diffraction fleck which was arranged like a ring was observed in the selected electron diffraction pattern. No macroscopic defects such as crack and peeling in Er2O3 coating layer were observed before and after thermal cycling test. The change of microstructure of the Er2O3 coating layer on before and after heat cycling test was reported. © 2012 The Japan Society of Plasma Science and Nuclear Fusion Research.

Toshima Manufacturing Co. and Toyota Jidosha Kabushiki Kaisha | Date: 2010-11-04

The present invention provides a method for manufacturing a steel plate-shaped component which can increase the yield and the working efficiency. When a steel plate-shaped component (

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