巻号一覧
38 巻, 3 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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宗像 誠二1987 年 38 巻 3 号 p. 83-91
発行日: 1987/03/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1002K) -
佐藤 金司, 鈴木 数夫1987 年 38 巻 3 号 p. 92-96
発行日: 1987/03/01
公開日: 2009/10/30
ジャーナル フリーIn the manufacture of electroplated diamond wheels, the physical properties of diamond gritspecifically the wetting form of grit in touch with deposited layer and the coercive force of the gritaffect the holding of the grit on the wheel surface. These effects were studied for ED-A, B, C, SNDMB and MBG-T grits. The wetting ability and coercive force of the grit were found to correlate well with long wheel life, and the MBG-T grit showed good results in terms of these results.抄録全体を表示PDF形式でダウンロード (1230K) -
高谷 松文, 松永 正久, 大高 徹雄1987 年 38 巻 3 号 p. 97-101
発行日: 1987/03/01
公開日: 2009/10/30
ジャーナル フリーElectrodeposited chromium -silicon carbide was deposited from chromium (III) sulfate -potasium formate solutions containing from 4 to 50g/L of silicon carbide having particle sizes 0.5 and 5μm.
It was possible to deposit a composite containing about 3.6wt% of particles. After optimum heat treatment in air, the maximum hardness was 1650Hv for trivalent chromium coatings, and 1550Hv for the composite coatings.
Wear characteristics were examined by a plane-reciprocating abrasive wear method.
The wear resistance characteristics obtained for the chromium-silicon carbide coatings in the heat treated condition were better than those of the heat treated trivalent chromium and hexavalent chromium coatings.抄録全体を表示PDF形式でダウンロード (2368K) -
吉村 長蔵, 野口 駿雄, 金銅 俊二1987 年 38 巻 3 号 p. 102-107
発行日: 1987/03/01
公開日: 2009/10/30
ジャーナル フリーAnodizing of aluminum was investigated in sodium phosphate (0.2M) baths saturated or dispersed with metal oxides (Al2O3, CuO, FeO, SnO2, ZnO) or metal hydroxides (Al OH3, Cr(OH)3).
Anodizing was carried out at a constant current density of 2A·dm-2 for the baths containing cupric oxide, ferrous oxide or stannic oxide, and at 1A·dm-2 for the bath containing zinc oxide.
In the case of the baths containing aluminum oxide, anodizing was carried out at a constant voltage of 40V.
Film thickness converted for electrolysis at 1A·dm-2 for 30min. was found to be greater in the bath dispersing aluminum oxide (about 4.6μm) than in the non metal oxide bath (adout 2.2μm). The effect of the additon of metal oxides on film thickness decreased in the order of Al2O3>ZnO>CuO>SnO2≤FeO.
In the case of the baths containing metal hydroxides, anodizing was carried out at a constant voltage of 60V. A thick film (about 4.2μm) was formed in a bath dispersing aluminum hydroxide.
Thicker films were formed in dispersed baths than in saturated baths of metal oxides or hydroxides.
The fact that a thicker film was formed in baths containing metal oxides or hydroxides may be explained by the action of the additives as a oxygen supplier and an enhancing medium of electric current.抄録全体を表示PDF形式でダウンロード (768K) -
佐藤 登, 南 達郎1987 年 38 巻 3 号 p. 108-112
発行日: 1987/03/01
公開日: 2009/10/30
ジャーナル フリーThe zinc phosphate film that formed on zinc surfaces is known as Hopeite [Zn3(PO4)2⋅4H2O], and it is known that when crystallized from zinc phosphate solution containning Mn2+, the crystal is modified by picking up Mn.
Since ordinary Hopeite dose not possess unpaired electron structure, it is inactive for electron spin resonance, but it was expected that Hopeite crystal containning Mn would become active for ESR because of the action of Mn as the transition metal.
State analysis was therefore performed on zinc phosphate crystal using data on ESR spectrum, and it was found that ordinary Hopeite crystal powder did not respond to ESR, while the modified Hopeite powder did respond showing a broad spectrum. When the modified Hopeite crystal powder was dispersed and suspended in pure water to decrease the Mn component density, the ESR spectrum of the sample gave the distinct six spectra, verifying the existence of Mn component in the modified Hopeite crystal, the chemical form of which was identified as Mn2+.
By comparing the spectrum to that of other samples, the chemical structure of Mn in the modified Hopeite was thought to be Zn3-XMnX(PO4)2⋅4H2O, i.e., insoluble zinc phosphate crystal.抄録全体を表示PDF形式でダウンロード (1231K) -
越前 祐太郎, 高田 幸路1987 年 38 巻 3 号 p. 113-115
発行日: 1987/03/01
公開日: 2009/10/30
ジャーナル フリーTo evaluate hydrogen embrittlement following cationic electrodeposition, slow-deflection fracture tests were carried out on high strength steels with cationic electrodeposited coatings. Stress rupture tests were also applied to notched tensile specimens with cationic electrodeposited coatings.
It was demonstrated that hydrogen absorbed during phosphating and cathodic treatment is readily removed by the baking process because of excellent permeability of hydrogen through the cationic electrodeposited coating.抄録全体を表示PDF形式でダウンロード (1466K)
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