Method of preparing aluminum-containing alloy powder and application thereof

A method for preparing an aluminum alloy-containing powder comprising the following steps:

• Step 1, select an initial alloy raw material, and melt the initial alloy raw material according to an initial alloy composition ratio to obtain a uniform initial alloy melt;
• a component of the initial alloy melt is REaAlbMcTd;
• wherein, RE includes at least one of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
• M includes at least one of W, Cr, Mo, V, Ta, Nb, Zr, Hf, Ti, Fe, Co, and Ni;
• T is an impurity element and contains at least one of O, H, N, P, S, F, Cl;
• a, b, c, d are atomic percentages of respective elements, and 35%≤a≤99.7%, 0.1%≤b≤25%, 0.1%≤c≤35%, 0≤d≤10%;
• Step 2, solidify the initial alloy melt into an initial alloy strip to generate a solidified structure of the initial alloy strip;
• the solidified structure of the initial alloy strip includes a matrix phase and a dispersed particle phase;
• the melting point of the matrix phase is lower than the melting point of the dispersed particle phase, and the dispersed particle phase is coated in the matrix phase;
• the average composition of the matrix phase comprises REx1Aly1Tz1, the composition of the dispersed particle phase comprises MxAly2Tz2, x1, y1, z1, x2, y2, z2 are atomic percentages of respective elements, and 68%≤x1<99.8%, 0.2%≤y1≤30%, 0≤z1≤30%;
• 77%≤x2≤99.8%, 0.1%≤y2≤22%, 0≤z2≤1.5%, z2≤d≤z1;
• during the solidification of the initial alloy melt, the impurity element T in the initial alloy melt is redistributed in the dispersed particle phase and the matrix phase, and is enriched in the matrix phase, so that the dispersed particle phase is purified;
• and
• Step 3, the initial alloy strip is reacted with an acid solution, the matrix phase in the initial alloy strip reacts with the acid solution to become ions entering the solution, and the dispersed particle phase that does not react with the acid solution is removed from the initial alloy;
• and the initial alloy strip is separated out to obtain an aluminum alloy-containing powder material whose component is Mx2Aly2Tz2.