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Volume 25, Issue 11
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[in Japanese]1974 Volume 25 Issue 11 Pages 578-587
Published: November 01, 1974
Released on J-STAGE: October 30, 2009
JOURNAL FREE ACCESSDownload PDF (1449K) -
Seiji KAMASAKI, Yoshimi TANABE1974 Volume 25 Issue 11 Pages 588-593
Published: November 01, 1974
Released on J-STAGE: October 30, 2009
JOURNAL FREE ACCESSThe nucleation, growth, and structure of electrodeposited Pd on Au thin films (about 600Å in thickness) were examined by electron microscopy. The Au thin films were prepared by electrodeposition on pure Fe from KCN bath, and its substrate was peeled off in 10% Nital. After scooped on a Mo grid, the films were annealed at 350°C for one hour in a vacuum furnace. The dislocation density of the films could turn to about 108-109cm-2 by this treatment. Pd nuclei were three-dimensional platelets and grew up to about 200Å in diameter, which made up plate crystals arranged in good orientation. Preferential nucleation occurred at dislocations of the Au films. Pd films deposited on (001), (110), (211), and (310) Au thin films exhibited parallel orientations. The dislocation density of the overgrowth films of Pd was about 5-8×1010cm-2. Examination of parallel Moire patterns revealed that the difference of lattice constant between the Pd overgrowth film and the Au substrate was reduced by elastic strain. Thirteen (13)% of the misfit between 120Å of Pd overgrowth films and 600Å of Au substrate was accommodated by this strain. The percentage of misfit accommodated by the elastic strain decreased with the increase in thickness of the overgrowth film.View full abstractDownload PDF (3952K) -
Yoshio OKI, Ichiro ONODA, Isao WATABIKI1974 Volume 25 Issue 11 Pages 594-597
Published: November 01, 1974
Released on J-STAGE: October 30, 2009
JOURNAL FREE ACCESSAs the results of the tests for photodegradation of plasticized polyvinyl chloride on aluminum plate containing several kinds of iron oxide pigments, it was found by electron microscopy and chemical analysis that the remarkable accelerating factors for the photodegradation included impurities such as copper in the oxides in addition to the shapes of oxide particles. Though the shapes, diameters, and manufacturing process of iron oxide particles had no effects on the photodegradation, it was clearly shown that the coagulation of pigment particles was more active in polyvinyl chloride film which had been more photodegraded referring to the relation between the change in shapes of pigment particles and degree of photodegradation of polyvinyl chloride film before and after the outdoor exposure test; and the plasticized polyvinyl chloride containing oxide of greater secondary coagulation characteristics showed a stronger tendency to accelerate the photodegradation. It was also observed by electron microscopy that the photodegradation of polyvinyl chloride film pigmented by iron oxide gradually developed from the irradiated surface to the interior of the film specimen and the degree of degradation was greater when the above developing speed was higher.View full abstractDownload PDF (1455K) -
Saburo KONISHI, Takahide YURI1974 Volume 25 Issue 11 Pages 598-601
Published: November 01, 1974
Released on J-STAGE: October 30, 2009
JOURNAL FREE ACCESSThe method for the estimation of chlorides in chromium plating bath by using chloride-electrode was studied and the following results were obtained. The potential was greatly controlled by the concentration of chromic acid in the determination of the chlorides in chromic acid by using chlorideelectrode. Therefore, it was impossible to estimate the chlorides in chromic acid directly by using chloride-electrode. However, the potential was not controlled by the concentration of chromic acid in the chromium plating bath, to 10ml of which had been added 5g of sodium acetate; therefore, it was known that the chlorides in the bath could be estimated by using chloride-electrode. In such a process, the quantity of sample solution increased by the addition of sodium acetate and the concentration of chlorides should be lower than that of the original plating bath. Whereas, the ionic strength of the sample solution increased by the addition of sodium acetate, and it offset the increase of activity of chlorides, by which the chloride concentration of the sample solution was determined as the same value as that of the original plating bath.View full abstractDownload PDF (606K) -
Takashi ABE, Kouji AIZAWA, Toshimitsu UCHIYAMA, Tatsuo OTSUKA1974 Volume 25 Issue 11 Pages 602-606
Published: November 01, 1974
Released on J-STAGE: October 30, 2009
JOURNAL FREE ACCESSAnodic oxidation of aluminum was examined in various solutions, such as maleic, tartaric and citric acids as well as the mixtures of sulfuric acid and any of the above-mentioned acid. In tartaric and citric acid solutions, the addition of sulfuric acid increased the specific conductances linearly and resulted in formation of locally thick grown films. Further addition caused the films discontinuous but no pittings. In maleic acid, of which specific conductance was higher than those of tartaric and citric acid, the addition of 0.6-5.0g/l sulfuric acid did not increase the specific conductance and resulted in continuous and colored films having uniform thickness. However, further addition caused pittings.View full abstractDownload PDF (1989K) -
Saburo KONISHI, Takahide YURI1974 Volume 25 Issue 11 Pages 607-608
Published: November 01, 1974
Released on J-STAGE: October 30, 2009
JOURNAL FREE ACCESSDownload PDF (196K)
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