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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.6
- 수록면
- 86 - 95 (10page)
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초록· 키워드
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This study investigated the effects of adding a third alloying element, Ni, to create Fe<SUB>70-x</SUB>Pd₃?Ni<SUB>x</SUB> (x = 2, 4, 6, 8 at.% Ni) ferromagnetic shape memory alloys (FSMAs). The Ni replaced a portion of the Fe. The Fe<SUB>70-x</SUB>Pd₃?Ni<SUB>x</SUB> alloys were homogenized through hot and cold forging to gain a ~38% reduction in thickness, next they were solution-treated (ST) with annealing recrystallization at 1100 ℃ for 8 h and quenched in ice brine, and then aged at 500 ℃ for 100 h. Investigation of the microstructures and magnetostriction indicated that the greater Ni amount in the Fe<SUB>70-x</SUB>Pd₃?Ni<SUB>x</SUB> alloys reduced saturation magnetostriction at room temperature (RT). It was also observed that it was more difficult to generate annealed recrystallization. However, with greater Ni addition into the Fe<SUB>70-x</SUB>Pd₃?Ni<SUB>x</SUB> (x = 6, 8 at.% Ni) alloys, the L1?+L1<SUB>m</SUB> twin phase decomposition into stoichiometric L1?+L1<SUB>m</SUB>+α<SUB>bct</SUB> structures was suppressed after the 500 ℃/100 h aging treatment. The result was that the Fe<SUB>70-x</SUB>Pd₃?Ni<SUB>x</SUB> (x = 6, 8 at.% Ni) alloys maintained a high magnetostriction and magnetostrictive susceptibility (Δλ<SUB>||</SUB><SUP>s</SUP>/ΔH) after the alloys were aged at 500 ℃ for 100 h. This magnetic property of the Fe<SUB>70-x</SUB>Pd₃?Ni<SUB>x</SUB> (x = 6, 8 at.% Ni) alloys make it suitable for application in a high temperature (T ＞ 500 ℃) and high frequency environments.
목차
1. Introduction
2. Experimental Details
3. Results and Discussion
4. Conclusions
References
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