巻号一覧
35 巻, 3 号
選択された号の論文の5件中1～5を表示しています
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佐藤 忠明, 西本 忠史, 木暮 英雄1984 年 35 巻 3 号 p. 134-139
発行日: 1984/03/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (768K) -
石黒 寿一1984 年 35 巻 3 号 p. 140-143
発行日: 1984/03/01
公開日: 2009/10/30
ジャーナル フリーIn our previous work, it was showed that spray fused coating of a commercial self-fluxing Nibase alloy for wear resistance is achieved in good performance with the developed automatic control system. The system consists of a high-frequency induction plasma torch, an equipment for moving the specimen, and a pyrometer. The specimen moves at the speed calculated exponentially from the temperature of area just treated. We applied this system to spray fused coating of an alloy of Ni-35%Cr-20%Mo-2%B-2%Si developed to provide resistance to crevice corrosion in sea water. Since the melting point of the alloys is higher than that of commercial self-fluxing alloys for wear resistance, it is difficult to apply the conventional manual operation to the alloy. This system has made it possible to spray and fuse the alloy satisfactorily, and the most suitable condition of treatment was clarified. The spray fused layer of the alloy contained about 30%Fe with dilution from base metal, but no detrimental effect on its resistance to crevice corrosion was revealed.抄録全体を表示PDF形式でダウンロード (2064K) -
津留 豊, 松永 守央, 細川 邦典1984 年 35 巻 3 号 p. 144-148
発行日: 1984/03/01
公開日: 2009/10/30
ジャーナル フリーThe effects of the product of the reaction of epichlorohydrin with hexamethylenetetramine on the electrocrystallization of zinc from an alkaline zincate bath have been investigated by electrochemical methods, electronmicroscopic observation and X-ray diffraction. Zinc deposits from an alkaline zincate bath containing brightening agent exhibited a preferred orientation with the {1120} plane parallel to the substrate surface. These results were interepreted in the light of deformation twinning on the basal plane which caused the basal plane platelets to be aligned perpendicular to the substrate. The average size of the platelets was decreased by shifting the impressed potential in the less noble direction, which resulted in good surface smoothness and demonstrated the potential dependence of the adsorption of the brightening agent.抄録全体を表示PDF形式でダウンロード (2167K) -
水本 省三, 縄舟 秀美, 川崎 元雄1984 年 35 巻 3 号 p. 149-154
発行日: 1984/03/01
公開日: 2009/10/30
ジャーナル フリーCopper was electrodeposited from additive-free acid sulfate baths on nickel (passivated in chromate solution for each run) or SUS304 substrate, the surfaces of which were engraved with 41 parallel lines at 0.25mm intervals. Tension tests were made on the copper foil obtained, and measurements were made of total elongation (gauge length=10mm) E, elongation for gauge length of 2.5mm including point of rupture) E3, and the maximum elongation at the rupture point E1. Observations with SEM and X-ray diffraction were also made. Constant linear relationships were found between E1, E2 and E3 regardless of bath composition, current density and foil thickness, though these relationships depended on the shape of the tensile specimen. For electrolytic copper foil 25-35μm thick, tensile strength and E3 were 30-40kg/mm2 and 15-25% respectively. For thicker foils, tensile strength was lower and elongation values were higher.抄録全体を表示PDF形式でダウンロード (1535K) -
小岩 一郎, 逢坂 哲彌1984 年 35 巻 3 号 p. 155-159
発行日: 1984/03/01
公開日: 2009/10/30
ジャーナル フリーCodeposition of Cr powder dispersed into electroless Ni-B films was studied for the purpose of developing a new type of resistive thin film. Films contained up to 5wt% dispersed Cr powder with a mean diameter 700Å and the deposition mechanism of this electroless dispersion plating agreed well with a modification of Guglielmi's deposition model. Codeposition mechanism was not affected by the addition of cationic sodium lauryl sulfate or anionic Arquard C-50 surfactant, however, the addition of cationic surfactant resulted in higher resistivity. Film resistivity after heat treatment decreased when the temperature was low but increased when the temperature was 600°C or more. Film with large amounts of Cr powder showed particularly high resistivity after high-temperature heat treatment. The change in film resistivity is explained by the hypothesis that the initial decrease is caused by crystallization of the film itself and the subsequent increase at higher temperatures is due to the formation of a solid solution of Cr and Ni.抄録全体を表示PDF形式でダウンロード (821K)
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