巻号一覧
27 巻, 7 号
選択された号の論文の5件中1～5を表示しています
- |<
- <
- 1
- >
- >|
-
川合 慧, 山際 洋一, 水沢 正, 渡辺 博1976 年 27 巻 7 号 p. 320-327
発行日: 1976/07/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (2236K) -
川崎 弘司, 関田 吉泰1976 年 27 巻 7 号 p. 328-333
発行日: 1976/07/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (772K) -
稲垣 雅一, 上田 重朋1976 年 27 巻 7 号 p. 334-337
発行日: 1976/07/01
公開日: 2009/10/30
ジャーナル フリーHalf-value breadth of X-ray diffraction line profile from the as-plated chromium deposit was found to be about 5.30°, but the same specimens annealed at 600°C gave the half-value breadth of 1.75°. Hard chromium coatings which had wide half-value breadth were characterized by high hardness. Close correlation was also observed between the Micro Vickers hardness and the half-value breadth of X-ray diffraction line. It was found that the hardness of electrodeposited chromium was related to the half-value breadth by the following simple equation, Hv=115B+325. Here, Hv is the value of the Micro Vickers hardness estimated from half-value breadth and B is half-value breadth of X-ray diffraction line. By using this equation, hardness of the chromium coatings can be determined by X-ray diffraction method with deviations of ±4% as compared to the Micro Vickers hardness measurement.抄録全体を表示PDF形式でダウンロード (568K) -
高橋 英明, 永山 政一1976 年 27 巻 7 号 p. 338-343
発行日: 1976/07/01
公開日: 2009/10/30
ジャーナル フリーAluminium specimens anodized to form porous oxide films in an oxalic acid solution were reanodized in a neutral boric acid-borate solution (pH=7.4, 20°C) at a constant c.d. of 0.5mA/cm2 and changes in the anodizing voltage and geometrical structure of the film were examined. An automatic apparatus was used for the current-controlled electrolysis and an ultra-thin sectioning technique was utilized in electron-microscopy. It was found that the oxide formation occurs both at the barrier oxide/solution and oxide/metal interphases. The former which leads to pore-filling is due to the transport of Al3+ ions through the barrier oxide whereas the latter is caused by the O2- ion transportation. The voltagetime relationship is represented by two successive straight lines of different slopes and the pore-filling was found to be completed at the time when the slope changes. Apparent transport numbers for Al3+ and O2- ions were determined respectively to be 0.40 and 0.60 and they were almost independent of the applied c.d. It is shown that the porosity and thickness of the film could be estimated by an analysis of the voltage-time relationship using the above transport numbers.抄録全体を表示PDF形式でダウンロード (1561K) -
林 美克, 横山 正義1976 年 27 巻 7 号 p. 344-348
発行日: 1976/07/01
公開日: 2009/10/30
ジャーナル フリーAl-Mg-Si alloys aged under various conditions were anodized at 15V in sulfuric acid solution, followed by anodizing at 4V in the same solution, and the anodic oxide films of grey to black in color were obtained. From the micro-structures and the electrical conductivities of aluminum alloys, it was found that the degree of color increases with an increase in the amount of Mg2Si precipitates, which depends upon the ageing conditions of the alloy. The roughening at metal-oxide interface of colored films suggests that the coloring may chiefly be caused by the formation of branched-pore structure due to the local-attack of the current to Mg2Si precipitates and resulting uneven dissolution of the barrier layer.抄録全体を表示PDF形式でダウンロード (1695K)
- |<
- <
- 1
- >
- >|