| Project/Area Number |
10555251
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Material processing/treatments
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| Research Institution | Kyushu Sangyo University |
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Principal Investigator |
AKIYAMA Tetsuya Kyushu Sangyo University, Engineering, Professor, 工学部, 教授 (10136517)
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| Co-Investigator(Kenkyū-buntansha) |
YAMASHITA Shinji Yaskawa Electric Corp., Research Laboratory, Manager, 基礎研究所, 課長
KOBAYASHI Shigeo Kyushu Sangyo University, Engineering, Assistant, 工学部, 助手 (00248345)
TSURU Toshiaki Kyushu Sangyo University, Engineering, Professor, 工学部, 教授 (90069493)
山下 慎次 (株)安川電機, 基礎研究所・超メカトロ研究室, 課長
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥10,600,000 (Direct Cost: ¥10,600,000)
Fiscal Year 1999: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1998: ¥8,700,000 (Direct Cost: ¥8,700,000)
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| Keywords | Electrodeposition / Magnetostriction / Tension / Torque Sensor / Nickel-Iron Alloys / Anomalous Codeposition / Addition Agent / Coercive Force / Aqueous Solution / 逆磁歪効果 / 張力 / トルク / センサ |
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| Research Abstract |
Fe-Ni alloy films were produced electrolytically for the development of tension/torque sensor utilizing magnetostriction effect. The results obtained are as follows ;
(1) Fe-Ni alloys were electrodeposited from sulfate, sulfamate and chloride baths to obtain the alloy film with a desired composition. The electrodeposition behavior of the alloys were found to be classified into the anomalous type in which less noble Fe were electroreduced in preference to Ni.
(2) The partial polarization curves of Fe and Ni were measured in the alloy planting and the single metal plating baths. The anomalous codeposition was caused by the suppression of Ni deposition in the presence of Fe but by the acceleration of Fe deposition.
(3) The most plausible hypothesis explaining for the anomalous codeposition is called hydroxide suppression mechanism involved with properties of aqueous solution. Then the solvent was changed from water to methanol. The electrodeposition behavior of Fe-Ni alloys from methanol baths also showed the anomalous type. Then, the hydroxide suppression mechanism is not necessarily applicable to Fe-Ni system.
(4) In order to improve the surface appearance of the alloy, boric acid was added to baths and lustrous films was obtained over a wide range of electrolysis conditions.
(5) The magnetic properties of the electrodeposited Fe-Ni alloys were investigated using VSM. The alloy films with 80 mass % Ni showed lower coercive force than 5 Oe and were available in practical use.
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