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制备了四元铁磁性Heusler合金Co_(50)Ni_(22)Ga_(28)Fe_x(x=0,1·5,2,2·5),发现材料具有很好的机械性能,在加压、弯曲和扭曲时都展现出很好的超弹性.室温时,在压力作用下,Co_(50)Ni_(22)Ga_(28)Fe_2单晶样品在[001]和[110]方向分别具有约4%和6·7%的完全可恢复应变.Co50Ni22Ga28Fe1·5单晶样品在室温下沿[001]和[110]方向的应力与应变σ-ε曲线的平台部分较缓,但升温到100℃时,σ-ε曲线中表示超弹性应变的平台变平.Co50Ni22Ga28Fe2·5成分的单晶在[001]方向可得到5·5%的超弹性应变.同时以上材料都显示出了明显的弹性各向异性.
The ferroelectric Heusler alloy Co_ (50) Ni_ (22) Ga_ (28) Fe_x (x = 0,1.5,2,2.5) was prepared and found to have good mechanical properties. Bending and twisting, respectively.At room temperature, under the action of pressure, the samples of Co_ (50) Ni_ (22) Ga_ (28) Fe_ % And 6.7% of the fully recoverable strain.Co50Ni22Ga28Fe1.5 single-crystal samples in the [001] and [110] direction at room temperature stress and strain σ-ε curve of the platform part of the slow, but the temperature was raised to 100 ℃ , the flat of the σ-ε curve that indicates the superelastic strain becomes flat. The single crystal of Co50Ni22Ga28Fe2 · 5 has a super elastic strain of 5.5% in the [001] direction, and the above materials all show obvious elastic anisotropy opposite sex.