巻号一覧
36 巻, 11 号
選択された号の論文の8件中1～8を表示しています
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長田 義仁, 太田 文彦1985 年 36 巻 11 号 p. 434-441
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1036K) -
松村 宗順1985 年 36 巻 11 号 p. 442-451
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (5491K) -
野口 駿雄, 吉村 長蔵1985 年 36 巻 11 号 p. 452-457
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーThe electrical properties of the anodic oxidation coatings formed in alkaline baths (NH4OH-NH4F bath and NaOH-H2O2 bath) were investigated and compared with those of an anodized film formed in an H2SO4 bath.
NaOH-H2O2 film showed a lower value of electric resistance than anodized coatings formed in NH4OH-NH4F or H2SO4 baths, and the value (20μm, 200°C) decreased in the order of NH4OH-NH4F film (1.7×1015Ωcm), H2SO4 film (1.3×1015Ωcm) and NaOH-H2O2 film (6.6×1013Ωcm). The anodized coatings formed in the H2SO4 bath showed higher resistance than the coatings formed in the alkaline baths, and electric resistance of these films increased as the temperature increased.
In the same manner, breakdown voltage of the films (5μm, 15°C) decreased in the order of H2SO4 film (75V), NH4OH-NH4F film (45V) and NaOH-H2O2 film (40V). NH4OH-NH4F film (20μm, 100°C: 11.5) showed a higher dielectric constant than H2SO4 (20μm, 100°C: 8.5).
From the above results, it is concluded that the pore walls of the NaOH-H2O2 film were non-uniform and branched, and that aluminum hydroxide containing a considerable amount of water was deposited on the pore walls.抄録全体を表示PDF形式でダウンロード (1221K) -
桑野 三郎, 杉山 匡宏, 渋谷 佳男, 大竹 輝徳, 沖 猛雄1985 年 36 巻 11 号 p. 458-465
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーThe conditions for depositing hard aluminum oxide film of a Knoop hardness number over 2000 have been investigated by an activated reactive evaporation process.
In this experiment, pure aluminum was evaporated in a reduced oxygen atmosphere and an aluminum oxide film was deposited on the substrates of mild steel or glass. With increases in ionization current, the hardness of the deposited film increased from HK 200 to HK 3600 and the rate of deposition decreased from 4.7×10-3μm/s to 0.33×10-3μm/s. Hardness increased abruptly to HK 2700 in reduced oxygen atmospheres over 9.31×10-3Pa and reached HK 3600 at a pressure of 13.3×10-3Pa, wheareas it decreased to HK 1200 at a pressure of 16.0×10-3Pa.
Hardness also increased from HK 1700 to HK 3000 when a bias voltag of 0.1-0.2kV was applied to the substrate, and reached HK 3600 at a bias substrare voltage of 0.4kV. Up to 589K, hardness was not influenced by the pre-heating temperature of the substrate but increased from HK 1800 to HK 3600 under pre-heating at 713K-793K. Typical conditions for depositing aluminum oxide film of over HK 2000 were electron beam gun power of 10kV-500 or 550mA, ionization current over 15A, oxygen pressure of 9.31-10.3×10-3Pa, substrate pre-heating temperature above 793K and a bias substrate voltage above 0.2kV.抄録全体を表示PDF形式でダウンロード (3628K) -
伊崎 昌伸, 榎本 英彦1985 年 36 巻 11 号 p. 466-471
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーChanges in the structure and tensile fracture mode of electroplated Ni-Sn alloys composed of 40-55 at % Sn have been studied. Under scanning electron microscopy, X-ray and electron diffraction, and photoelectron spectroscopy, before and after fracture at differrent strain rates, a distinctive relationship was found between alloy composition and fracture mode. In 40-52 at % Sn alloys, fractures at low strain rates ran through the SnO2 phase, which was a substance filling in between microcrystallite grains having NiSn structure, whereas at high strain rates, cleavage of the NiSn grains occured. In 53-55 at % Sn alloys, however, the fracture was identified as a cleavage of the NiSn phase, which did not depend on strain rate. The change in the fracture phase at low strain rates from the SnO2 to the NiSn phase, is ascribed to a change in the preferred orientation of the NiSn phase as detected by pole figure technique.抄録全体を表示PDF形式でダウンロード (2364K) -
神田 勝美, 林 芳夫, 山根 啓二, 近藤 嘉一1985 年 36 巻 11 号 p. 472-477
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーZinc Powder and thermosetting epoxyresin powder were cathodically electrodeposited on Zn-Co-Mo plated steel sheet (zinc weight: 10g/m2) from a suspension bath containing alumina sol. The structure of the composite coating was examined by EPMA, ESCA and X-ray diffraction, and it was found that zinc and epoxyresin powders were covered with Al compounds, mainly Al (OH)3. Steel sheet on which composite was electrodeposited to a thickness of 20-25μm from a suspension bath containing alumina sol 40g/l, zinc powder 40-80g/l and epoxyresin powder 80g/l and cured at 200°C had good formability and superior corrosion resistance compared with hot-dipped galvanized steel sheet.抄録全体を表示PDF形式でダウンロード (1164K) -
I. 二段化成皮膜の構造解析高橋 英明, 熊谷 仁志, 永山 政一1985 年 36 巻 11 号 p. 478-482
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーDouble layered porous oxide films were formed on aluminum by two step anodizing at an initial current density (i1) in a H2SO4 solution (S-layer) and again at a second current density (i2) in a H2C2O4 solution (O-layer). The anodized specimens were re-anodized in a neutral borate solution at constant current density to follow the change in anode potential (E) with time (t). The geometrical structre of the double layered films was estimated by analysing the E-t curves (pore-filling method).
It was found that the structure of the O-layer was dependent on i2, but independent of the structure of the S-layer formed at i1. Pore-widening in the S-layer was observed to take place by chemical dissolution during the formation of the O-layer.抄録全体を表示PDF形式でダウンロード (620K) -
林 芳夫, 中本 哲男, 神田 勝美1985 年 36 巻 11 号 p. 483-488
発行日: 1985/11/01
公開日: 2009/10/30
ジャーナル フリーThe heat resistance and the weatherability of polyvinylchloride (PVC) powders used for PVC coated steel sheet were studied by electron spin resonance (ESR). PVC powders on the market differed respectively in the amount of radical formation at 160°C, heat resistance and film weatherability.
Washing the PVC powders in a methanol/water solution decreased the amount of radical and improved the heat resistance and the weatherability of the films. Washed PVC powders showed close correlation among the amount of radical, the heat resistance and film weatherability, but no correlation was found in the case of the unwashed PVC powders. The experimental results indicated that the radicals detected by ESR at 160°C were mainly due to impurities mixed in during PVC polymerization, and that some of the impurities showed a negative effect and others showed no effects on the heat resistance and the weatherability.抄録全体を表示PDF形式でダウンロード (1120K)
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