巻号一覧
33 巻, 7 号
選択された号の論文の6件中1～6を表示しています
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渡辺 徹, 田辺 良美1982 年 33 巻 7 号 p. 318-325
発行日: 1982/07/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1973K) -
奥田 聖, 宮下 文彬, 宮谷 義六1982 年 33 巻 7 号 p. 326-331
発行日: 1982/07/01
公開日: 2009/10/30
ジャーナル フリーBefore the heat treatment of the specimens at different temperature of 453 to 493K of temperature below melting point of tin, Cu-Zn alloys with 5, 10, 20, 30, and 38wt% of zinc content were coated by an electrodeposited tin layer of 200μm thickness. The vertical cross section of the heat treated specimens were analysed by EPMA. By the heat treatment of Cu-5 and 10wt% Zn at 453 to 493, η-phases were consisted at the interface between Cu-Zn alloy and tin. The relation of the rate of growth of the phase and the equation W=kt1/2 was clearly noticed. The temperature dependence equation of the growth rate of each layer was shown by k2=Aexp (-E/RT) (m2/s). From this experiment, the following values were obtained that the values of A=8.9×10-3, E=1.2×105 at Cu-5 wt% Zn, A=1.2 ×10-3, E=1.2×105 at Cu-10wt% Zn and A=1.5, E=1.4×105 at above 20wt% Zn. When Cu-20, 30 and 38wt% Zn and plated tin are diffused each other, the compound layer of η and β were grown and the equation W=kt1/2 was also obtained at the treatment temperature range of 453 to 483K except 493K. The temperature equation of the growth rate of compound layer of these samples was not influenced by difference of zinc content.抄録全体を表示PDF形式でダウンロード (1915K) -
榎本 英彦, 石川 正巳, 藤原 裕1982 年 33 巻 7 号 p. 332-336
発行日: 1982/07/01
公開日: 2009/10/30
ジャーナル フリーProperties of Sn-Ni alloy deposits obtained from pyrophosphate baths have been measured as a function of plating variables. The Sn-Ni alloy composition was found to be almost constant, even when the bath composition was changed in a fairly wide range. The Sn-Ni alloy deposits prepared by the optimum condition had a mirror bright surface with a slight tensile stress (30kg/mm2) and high hardness (580V. H. N.). Properties of the Sn-Ni alloy deposits were affected by the glycine concentration in the bath, since its concentration influenced the alloy composition. When the molar ratio of glycine to Ni2+ ion was greater than 2, the compositon of the Sn-Ni alloy deposits was found to be almost constant. The granular Sn-Ni alloy deposits turned to smooth surface with increasing glycine concentration. With an addition of ammonium hydroxide, the internal stress of the Sn-Ni alloy deposits decreased, and its hardness turned to be high. The Sn-Ni alloy deposits from pyrophosphate bath have similar properties of the deposits from fluoride bath.抄録全体を表示PDF形式でダウンロード (2100K) -
虫明 克彦, 増子 昇, 鯨井 勝1982 年 33 巻 7 号 p. 337-340
発行日: 1982/07/01
公開日: 2009/10/30
ジャーナル フリーParticle size of alumina in Ni-Al2O3 composites deposited on cylindrical rotating cathodes was investigated for two different cathode diameters (1cm and 3cm). The composites formed at different rotation speeds were dissolved in hot concentrated nitric acid. Insoluble alumina residua were washed, settled, and redispersed. The particle size distribution of the residua was determined by means of centrifugal sedimentation. It was found that the characteristic particle size for both cathodes is inversely proportional to the rotation speed of the cathode. The volume percentage of alumina in the composites decreases with increasing rotation speed, but, remains constant at rotation speeds higher than 1000rpm for the 3cm diameter cathode. This result stands beyond the estimation based on the theory of the detaining function, but may be attributed to an influence of the solution movement on the particle size distribution in the vicinity of the cathode surface.抄録全体を表示PDF形式でダウンロード (1201K) -
榎本 英彦, 藤原 裕1982 年 33 巻 7 号 p. 341-344
発行日: 1982/07/01
公開日: 2009/10/30
ジャーナル フリーTin-nickel alloy deposits have been used as an undercoat for gold electric contacts. The contact resistance of the tin-nickel alloy deposits were examined by the aging tests compared with bright nickel coating. In dry air aging test, the contact resistance of tin-nickel and bright nickel deposits rise very slowly. In humid air aging test (steam treatment or salt spray test), however, the contact resistance of bright nickel rises more rapidly than that of tin-nickel deposit. Properties of the surface film formed on tin-nickel alloys seemed to be different from those on bright nickel. Thin gold overlay on the bright nickel deposits gave rise to higher contact resistance during the salt spray test in a short period, whereas thin gold overlay on the tin-nickel alloy deposits maintained a lower contact resistance for prolonged periods. Gold thickness can be reduced by using the tin-nickel alloy deposit as an undercoat.抄録全体を表示PDF形式でダウンロード (516K) -
内藤 茂, 米野 実1982 年 33 巻 7 号 p. 345-350
発行日: 1982/07/01
公開日: 2009/10/30
ジャーナル フリーIn order to see the effect of phosphate coatings on the adhesibility of electro-deposited paint films to steel sheet, the solubility of Hopeite (Zn3(PO4)2⋅4H2O) on the electro-galvanized steel sheet (E. G.) was investigated compared with the solubility of Phosphophyllite (Zn2Fe(PO4)2⋅4H2O) on the cold rolled steel sheet (C. R.). The solubility of hopeite was found in pH region of 2-12 not different from that of Phosphophyllite. The adhesibility of cathodic electro-deposited paint films to C. R. with phosphate coatings of different Phosphophyllite/(Hopeite+Phosphophyllite) (P/(P+H)) was also examined by some testing methods. The forming testing method showed the different result from that by the uniformly testing method, and EPMA images showed the less remained phosphorus on the film stripped surface of C. R. with decreasing P/(P+H) ratio. The adhesibility seems to decrease with the decrease of P/(P+H) ratio.抄録全体を表示PDF形式でダウンロード (2411K)
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