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Fe - Ni 인바합금의 자기적성질에 미치는 Mn, Cr 및 Co의 첨가효과
이종현(J. H. Lee),김희중(H. J. Kim),강일구(I. K. Kang),김학신(H. S. Kim) 한국자기학회 1993 韓國磁氣學會誌 Vol.3 No.1
The effects of Mn, Cr or Co addition on the magnetic properties of Fe-Ni Invar alloys were investigated. The composition range of the three additives is up to 5wt%. In the temperature range of room temperature-250℃, the variation of specific magnetization with the addition of Mn, Cr or Co in the Fe-Ni alloys except for 5wt% Co shows the phenomenon characteristics of the Invar effect, viz., the specific magnetization decreases very abrubtly with the temperature and the dependence of temperature on the specific magnetization is in the mixed form of T^(3/2) and T². In the room temperature, the amount of increase in the specific magnetization, Curie temperature and coercivity is in order of Co>Cr>Mn. In the case of 5wt% Co an anomalous phenomena were observed due to the occurrance of ferromagnetic α phase which reduces the invar effect.