Method for producing high-entropy alloy superconductor bulk materials and wire materials, bulk high-entropy alloy superconductor produced using the method, and method for producing thin-film high-entropy alloy superconductor using the same

A method for producing a bulk high-entropy alloy superconductor, the method comprising:

• a first step of mixing to 10 types of metals selected from a group consisting of niobium (Nb), tantalum (Ta), titanium (Ti), hafnium (Hf), zirconium (Zr), tungsten (W), molybdenum (Mo), chromium (Cr), vanadium (V), and rhenium (Re) with each other to prepare a mixture, and then milling the mixture to prepare mixed metal powders according to a following Chemical Formula I;
• and
• a second step of sintering the mixed metal powders prepared in the first step:
• (M1)x1(M2)x2(M3)x3 . . . (Mn)xn (I)
• where n is an integer from 4 to 10,
• M1 to Mn respectively represent the 4 to 10 types of the metals selected from the group consisting of niobium (Nb), tantalum (Ta), titanium (Ti), hafnium (Hf), zirconium (Zr), tungsten (W), molybdenum (Mo), chromium (Cr), vanadium (V), and rhenium (Re),
• each of x1 to xn is an integer greater than or equal to 1, and has a value of 5% to 35% of a total of x1 to xn-
• wherein the 4 to 10 types of the metals in the first step include niobium (Nb), tantalum (Ta), titanium (Ti), hafnium (Hf) and zirconium (Zr),
• wherein the alloy produced in the second step has a following Chemical Formula II:
• (Nb)y1(Ta)y2(Ti)y3(Hf)y4(Zr)y5 (II)
• wherein y1 is 2,
• y2 is 1,
• y3 is 1,
• y4 is 1, and
• y5 is 1.