http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
자장중 열처리에 의한 Nd₂Fe₁₄B / Fe₃B 초미세립 복합자성상의 자기특성 향상
박언병(Eon Byeong Park),양충진(Choong Jin Yang) 한국자기학회 1996 韓國磁氣學會誌 Vol.6 No.2
An externally applied magnetic field during annealing the Nd₂Fe₁₄B/Fe₃B based spring magnet was found to enhance the exchange coupling between the hard and soft magnetic grains. More than 30 % increase in remanence values for melt-spun Nd₄Fe_(73.5)Co₃(Hf_(1-x)-Ga_x)B_(18.5)(x=0, 0.5, 1.0) alloys was resulted from uniform distribution of Fe₃B, α-Fe as well as Nd₂Fe₁₄B, and also from reduced grain size of those phases by 20 %. The result also showed that there is an optimum grain size exhibiting a high coercivity value which will be discussed in terms of previously simulated exchange coupling parameter.
RF 플라즈마 처리법에 기반한 기계적 밀링된 Zr 분말의 구형화에 따른 특성 변화
이유경,최미선,박언병,오정석,남태현,김정기,Lee, Yukyeong,Choi, Mi-Sun,Park, Eon Byeong,Oh, Jeong Seok,Nam, Taehyun,Kim, Jung Gi 한국분말재료학회 (*구 분말야금학회) 2021 한국분말재료학회지 (KPMI) Vol.28 No.2
Powder quality, including high flowability and spherical shape, determines the properties of additively manufactured products. Therefore, the cheap production of high-quality powders is critical in additive manufacturing. Radio frequency plasma treatment is an effective method to fabricate spherical powders by melting the surface of irregularly shaped powders; in the present work, mechanically milled Zr powders are spheroidized by radio frequency plasma treatment and their properties are compared with those of commercial Zircaloy-2 alloy powder. Spherical Zr particles are successfully fabricated by plasma treatment, although their flowability and impurity contents are poorer than those of the commercial Zircaloy-2 alloy powder. This result shows that radio-frequency plasma treatment with mechanically milled powders requires further research and development for manufacturing low-cost powders for additive manufacturing.