HIGH-THROUGHPUT PREPARATION METHOD OF (Sm,T)(Fe,M)12 ALLOY BASED ON DIFFUSION MULTIPLE

A method of preparing a (Sm,T)(Fe,M)12 alloy based on a diffusion multiple, comprising:

• (a) preparing a can and a cover matched with the can;
• and machining a rectangular groove with a size of 3a×2b×c in the can, wherein 10 mm≥a≥3 mm, 10 mm≥b≥3 mm, and c≥10 mm;
• (b) preparing 6 metal strips each with a size of a×b×c, and grinding and polishing surfaces of the 6 metal strips;
• wherein the 6 metal strips are made of Fe, Sm, T1, T2, M1, and M2, respectively;
• T1 and T2 are independently selected from the group consisting of Y, Gd, Zr, Nd, Pr, Ce, and a combination thereof;
• M1 and M2 are independently selected from the group consisting of Ti, Cr, Mn, Mo, Si, Al, Ga, Co, V, and a combination thereof;
• and a, b and c represent length, width and height of each of the 6 metal strips, respectively;
• (c) arranging the 6 metal strips in sequence to form a cuboid structure of 3a×2b×c, wherein a Sm metal strip is located at a middle of a first row of the cuboid structure, and a Fe metal strip is located at a middle of a second row of the cuboid structure, a M1 metal strip and a M2 metal strip are located at two sides of the Fe metal strip, respectively, and a T1 metal strip and a T2 metal strip are located at two sides of the Sm metal strip, respectively;
• loading the cuboid structure into the rectangular groove;
• sealing the can with the cover;
• and performing vacuum electron beam welding on the can to obtain a welded can;
• (d) subjecting the welded can to hot isostatic pressing to obtain the diffusion multiple;
• and
• (e) cutting the diffusion multiple into a plurality of slices in a height direction followed by tube sealing and diffusion heat treatment to obtain the (Sm,T)(Fe,M)12 alloy.