• Title/Summary/Keyword: 합금철

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Magnetostriction of B2-structured FeX (X = Al, Si, Ni, Ga, Ge, and Sn) Alloys: A First-principles Study (B2 구조 FeX(X = Al, Si, Ni, Ga, Ge, Sn) 합금의 자기변형에 대한 제일원리계산)

  • Lee, Sunchul;Odkhuu, Dorj;Kwon, Oryong;Hong, Soon Cheol
    • Journal of the Korean Magnetics Society
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    • v.23 no.4
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    • pp.117-121
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    • 2013

  • In this study we investigated magnetism and magnetostriction of B2-structured FeX (X = Al, Si, Ni, Ga, Ge, and Sn) using a first-principles method, in order to survey the possibility of developing a transition metal based magnetostriction material. The Full-potential Linearized Augmented Plane Wave method was employed for solving the Kohn-Sham equation within the generalized gradient approximation for exchange-correlation interaction between electrons. FeX alloys are stabilized in ferromagnetic states except for the FeSi and FeGe alloys. Magnetostrcition coefficients of FeX (X = Al, Ni, Ga, and Sn) were calculated to be -5, +6, -84, -522ppm, respectively. It is noteworthy that the magnetostriction coefficient (-522ppm) of FeSn is larger than that (+400ppm) of Gafenol.

  • https://doi.org/10.4283/JKMS.2013.23.4.117 인용 PDF KSCI

Separation of Iron and Nickel from Heavily Concentrated Aqueous Ferric Chloride Solution by Liquid-liquid Extraction (염화 제2철 농축 수용액으로부터의 액-액 추출에 의한 철과 니켈의 분리)

  • Park, Moo-Ryong;Kim, Young-Wook;Park, Jae-Ho;Park, Chin-Ho
    • Clean Technology
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    • v.13 no.4
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    • pp.274-280
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    • 2007

  • A liquid-liquid solvent extraction process was developed in this study to recover Fe and Ni from heavily concentrated aqueous ferric chloride solution, in an effort to substitute the conventional iron reduction method. Solvent composition and extraction conditions were first developed from the laboratory experiments, and the pilot system was designed and built for commercialization. Stage numbers for extraction and stripping were determined from pilot plant runs, and other operation data were obtained for mass production.

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Magnetic Property Effects of the Strip on Transducer Sensitivity in a Magnetostrictive Strip Type Guided Wave Transducer (자왜 스트립 도파변환기에서 스트립의 자기적 특성이 변환기 감도에 미치는 영향)

  • Kim, Sung-Joon;Choi, Myoung-Seon
    • Journal of the Korean Society for Nondestructive Testing
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    • v.28 no.2
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    • pp.205-210
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    • 2008

  • Magnetic hysteresis loops of a nickel strip and a Fe-Co alloy strip, which have been used in magnetostrictive strip type guided wave transducers for long range ultrasonic testing of pipelines, were measured and then magnetic property effects of a strip on transducer sensitivity were analyzed. The sensitivity of an optimized Fe-Co strip transducer was superior to that of the nickel strip transducer by a factor of about 30. It was shown that this was mainly attributed to the differences in remanence magnetization and coercivity of the two magnetostrictive materials.

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