Method for controlling large-size FeGa magnetostrictive single crystal to grow on solid-liquid interface

[0045] Example 1 Preparation of 30mmFe 81 Ga 19 Single crystal

[0046] The steps used in this embodiment are as follows:

[0047] 1) Ingredients

[0048] The purity of the selected raw materials Fe and Ga are both 99.99wt%, and in order to prevent the Ga element from burning during the smelting process, the Fe 81 Ga 19 Add 2wt% Ga on the basis of the composition. Specifically, 1547.1 g of Fe and 461.8 g of Ga were weighed for use. Before mixing, Fe must be ultrasonically cleaned with absolute ethanol and dried under vacuum to remove oil on the surface.

[0049] 2) Preparation of master alloy ingot

[0050] Put the above-mentioned weighed raw materials Fe and Ga into the crucible of the vacuum non-consumable arc smelting furnace. When placing, it is necessary to place the easily burned Ga element on the bottom of the crucible, and the non-burnable Fe element on the crucible.

[0051] Vacuum the vacuum non-consumable arc melting furnace to 5.0×10 -3 After Pa, fill the furnace body with hig

[0063] Example 2 Preparation of 40mmFe 81 Ga 19 Single crystal

[0064] The steps used in this embodiment are as follows:

[0065] 1) Ingredients

[0066] The purity of the selected raw materials Fe and Ga are both greater than 99.99wt%, and in order to prevent the Ga element from burning during the smelting process, the Fe 81 Ga 19 Add 2wt% Ga on the basis of the composition. Specifically, 1547.1 g of Fe and 461.8 g of Ga were weighed for use. Before mixing, Fe must be ultrasonically cleaned with absolute ethanol and dried under vacuum to remove oil on the surface.

[0067] 2) Preparation of master alloy ingot

[0068] Put the above-mentioned weighed raw materials Fe and Ga into the crucible of the vacuum non-consumable arc smelting furnace. When placing, it is necessary to place the easily burned Ga element on the bottom of the crucible, and the non-burnable Fe element on the crucible.

[0069] Vacuum the vacuum non-consumable arc melting furnace to 5.0×10 -3 After Pa, fill the furnace

[0080] Example 3 Preparation of 50mmFe 81 Ga 19 Single crystal

[0081] The steps used in this embodiment are as follows:

[0082] 1) Ingredients

[0083] The purity of the selected raw materials Fe and Ga are both greater than 99.99wt%, and in order to prevent Ga element from burning during the smelting process, the Fe 81 Ga 19 Add 2wt% Ga on the basis of the composition. Specifically, 1547.1 g of Fe and 461.8 g of Ga were weighed for use. Fe must be ultrasonically cleaned with absolute ethanol before mixing, and dried under vacuum to remove oil on the surface.

[0084] 2) Preparation of master alloy ingot

[0085] Put the above-mentioned weighed raw materials Fe and Ga into the crucible of the vacuum non-consumable arc smelting furnace. When placing, it is necessary to place the easily burned Ga element on the bottom of the crucible, and the non-burnable Fe element on the crucible.

[0086] Vacuum non-consumable arc melting furnace to 5.0×10 -3 After Pa, fill the furnace body with high-