• 제목/요약/키워드: amorphous ribbon

검색결과 108건 처리시간 0.048초

장력 변화에 따른 Fe-B-Si 비정질 리본의 고주파 자기특성 변화 (High Frequency Magnetic Properties of Tensioned Amorphous Fe-B-Si Ribbon)

  • 김기욱;민복기;송재성;김병걸;황시돌;최형식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 C
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    • pp.1345-1347
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    • 1994

  • High frequency Magnetic Properties of amorphous $Fe_{78}B_{13}Si_9$ ribbon were studied. Squareness ( Br/Bs ) and coercive force ( Hc ) of the specimen field annealed at $380^{\circ}C$ for 2 hrs are changed with the tension and the measuring frequency. So, we could optimise the tension having good magnetic properties at a certain frequency.

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Corrosion Characteristics of Amorphous Alloy Ribbon ($Fe_{70}Cr_5Si_{10}B_{15}$ and $Co_{70}Cr_5Si_{10}B_{15}$) in Hydrochloric Acid Aqueous Solution

  • Choi, Chil-Nam;Hyo, Kyung-Yang;Yang, Myung-Sun
    • 한국환경과학회:학술대회논문집
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    • 한국환경과학회 2001년도 정기총회 및 봄 학술발표회 초록집
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    • pp.236-237
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    • 2001

  • In this study, experiments were carried out to measure the variations in the corrosion potential and current density of polarization curves with amorphous $Fe_{70}Cr_5Si_{10}B_{15}$ and $Co_{70}Cr_5Si_{10}B_{15}$ alloy ribbon. The results were particularly examined to identify the influences of corrosion potential including various conditions such as hydrochloric acid, temperature, salt, pH, and oxygen. The optimum conditions were established with variations including temperature, salt, pH, oxygen, corrosion rate, and resistance of corrosion potential. The mass tranfer coefficient(${\alpha}$) value was determined with the Tafel's slope for the anodic dissolution based on the polarization effect with optimum conditions. The second anodic current density peak and maximum passive current density were designated as the critical corrosion sensitivity($I_{r}/I_{f}$).

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