발간논문

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Vol.27, No.12, 1077 ~ 1085, 1989
Title
The Effects of Al , Ce on the Magnetic Properties of Nd - Zr - Fe - Co - B System Permanent Magnet
김동엽D . Y . Kim, 정원용W . Y . Jeung, 강일구I . K . Kang, 오재현J . H . Oh
Abstract
The effects of addition of Al and Ce to a Nd-Zr-Fe-Co-B permanent magnet alloy on the magnetic properties was investigated. The variations of Curie temperatures and the temperature coefficients of remanence and coercivity by addition of Al was also examined. The coercivity of Nd-Br-Fe-Co-B alloy increased at a rate of 2kOe/at% Al with increasing Al content. But the Curie temperature and remanence were decreased at a rate of 13℃/at% Al and 0.6 kG/at% Al. The addition of Al did not improve the thermal stability of this, alloy system. The alloy with addition of 4.5 at% Al showed the temperature coefficients of remanence and coercivity of 0.101 and 0.64 respectively. The addition of Ce deteriorated the thermal stability of remanence of the alloy.
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