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Volume 28, Issue 11
Displaying 1-5 of 5 articles from this issue
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Yutaka KATO, Kenji TSUKAMOTO, Eizo ISOYAMA, Toshimitsu UCHIYAMA1985 Volume 28 Issue 11 Pages 785-790
Published: November 20, 1985
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSDownload PDF (680K) -
Shigemi YUGO, Suguru IWASAWA, Tadamasa KIMURA, Shigetoshi YUKIZANE1985 Volume 28 Issue 11 Pages 791-795
Published: November 20, 1985
Released on J-STAGE: January 28, 2010
JOURNAL FREE ACCESSWe studied the properties of films produced by cracking methane gases in a microwave discharge in the temperature range 700-1000°C, methane concentrations from 1 to 6% and discharge pressures from 300-6000 Pa.
The deposits were identified by secondary electron microscopy and electron diffraction. It was found that the structure of deposited films could be classified into 5 types by deposition conditions; (amorphous, diamond, a, β-SiC and graphite).View full abstractDownload PDF (967K) -
Kimio UEDA, Katsuyoshi HAMASAKI, Isao YAMADA, Tsutomu YAMASHITA, Trano ...1985 Volume 28 Issue 11 Pages 796-802
Published: November 20, 1985
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSThe epitaxial growth of NbN films deposited on rf-sputtered MgO films have been prepared by rf-magnetron sputtering in N2/Ar atomosphere. These epitaxially growth films of (200)Mgo//(200)NbN orientation were formed on various kinds of substrates. The reactively sputtered NbN on MgO films had high critical temperature. The Tc value of NbN (25nm) /MgO (80nm) film is about 15.7 K. Also all-refractry Josephson tunnel junctions were formed without breaking vacuum, producing the epitaxially growth NbN/MgO/NbN sandwitch on MgO thin films on unoxidized Si substrate. The epitaxial junction has the high sum-gap voltage, and shows excellent I-V characteristics.View full abstractDownload PDF (1216K) -
Tadashi SAWADA, Masahide NAKAMURA1985 Volume 28 Issue 11 Pages 803-809
Published: November 20, 1985
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSThis type of seal can seal fluids with zero leakage by means of its pumping action, but even if a small leakage occurs in such a case as labyrinth seals, it is sometimes necessary to seal a higher pressure difference (or pressure ratio) than one which is achieved under zero leakage conditions.
A theory for the performance of the seal with a leakage is presented, and the seals with various geometries. The results show that spiral grooves work as the sealing elements only when the rate of leakage is small and that the grooves promote leak when the rate of leakage exceeds a certain value.View full abstractDownload PDF (638K) -
Masao WATANABE, Masanori HASHIMOTO1985 Volume 28 Issue 11 Pages 810-813
Published: November 20, 1985
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSWe have developed a Laser Raman-Ellipsometry combined system to analyze solid surfaces in situ under chemical reactions. Reaction products in gas phase are analyzed by a mass spectrometer, a surface layer formed by the reaction is analyzed by an Ellipsometer, and surface species by a Raman spectrometer. The system is applied to study the dissociative reaction of CO gas on an iron surface under 1 atm. pressure. C and O atoms from CO gas diffuse into the interior of the Fe to form a diffusion layer, whose thickness and dielectric constant are determined. After formation of the diffusion layer of 11 nm an Fe3O4 oxide formation occurs from the surface. We have found that the Fe3O4 layer of 16 nm generates the A1g phonon mode at 672cm-1 compared with 675cm-1 from a bulk Fe3O4. Two kinds of surface Raman bands induced from CO adsorbed on the Fe3O4 are observed at 1121cm-1 and 1812cm-1, respectively, which seem to be surface-enhanced. It is concluded that the system is a very powerful tool to study solid surfaces under chemical reaction conditions.View full abstractDownload PDF (636K)
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