Bi substituted Mn absent Mn2Sb-based alloy and preparation method and application thereof
A base alloy and alloy technology, which is applied in the field of Bi-substituted Mn-deficient Mn2Sb-based alloys and their preparation, can solve the problems of unable to obtain first-order magneto-elastic phase change materials, unable to realize substitution, etc., and achieve simple and convenient preparation methods and energy. The effect of low consumption and low preparation cost
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Embodiment 1
[0044] A Bi-substituted Mn-deficient Mn 2 The preparation method of Sb-based alloy, comprises the steps:
[0045] This embodiment has an alloy with a first-order magnetoelastic phase transition, and its chemical formula is Mn 2-y Sb 1-x Bi x , both x and y take 0.03.
[0046] Calculate the mass of the required Mn, Sb, and Bi elemental elements according to the ratio of the amount of the substance for batching. The accuracy is 0.1mg-0.01mg. The purity of the metal elements is above 99.99%. To compensate for the loss caused by Mn volatilization during the smelting process;
[0047] Put the prepared raw materials into the water-cooled copper crucible electric arc furnace, and pump the vacuum to 10 -3 Below Pa, fill in argon gas with a purity of 99.999% at 1 atmosphere, and carry out arc melting. During the first smelting, melt the metal with a current of 25A until the molten metal in the crucible is seen to flow, and the block smelted in the first pass Turn over the sample,...
Embodiment 2
[0050] This embodiment has an alloy with a first-order magnetoelastic phase transition, and its chemical formula is Mn 2-y Sb 1-x Bi x , x is taken as 0.03, and y is taken as 0.06. The specific preparation method is the same as that of Example 1, except that the ingot annealing temperature is 1000°C and the annealing time is 200h. Adopt the measurement process of embodiment 1, in Mn 1.94 Sb 0.93 Bi 0.03 A clear first-order magnetoelastic phase transition was also observed in the samples.
Embodiment 3
[0052] This embodiment has an alloy with a first-order magnetoelastic phase transition, and its chemical formula is Mn 2-y Sb 1-x Bi x , x takes 0.07, y takes 0.1, the specific preparation method is the same as the preparation process of Example 1, the difference is that Mn 1.9 Sb 0.93 Bi 0.07 The stoichiometric ratio is used to calculate the mass of the required Mn, Sb, and Bi elements for batching. The ingot annealing temperature is 900°C, and the annealing time is 180h. Adopt the measurement process of embodiment 1, in Mn 1.9 Sb 0.93 Bi 0.07 A clear first-order magnetoelastic phase transition was observed in the samples.
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