Multi-component high entropy alloy with nanoscale atomic self-ordering structure and preparation methods thereof

A multi-component high entropy alloy with nanoscale atomic self-ordering structure, comprising a composition of cobalt (Co), nickel (Ni), chromium (Cr), aluminum (Al), titanium (Ti), molybdenum (Mo), tantalum (Ta), and niobium (Nb), wherein the multi-component high entropy alloy is represented by the formula:

• CoaNibCrcAldTieMofTagNbh, where a, b, c, d, e, f, g, h, correspond to the atomic percentage of metal elements and, 10≤a≤70, 10≤b≤50, 0.1≤c≤20, 0.1≤d≤20, 0.01≤e≤10, 0.01≤f≤10, 0.1≤g≤10, 0.01≤h≤10, and wherein the multi-component high entropy alloy is a near-void-free alloy, and the multi-component high entropy alloy exhibits the nanoscale atomic self-ordering structure with dimensions ranging from 1 to 5 nm, wherein the multi-component high entropy alloy has a relative density of at least 95% compared to a reference material;
• wherein the alloy is prepared by the following steps:
• weighting and blending metal powders to obtain a mixture;
• degassing and slagging the mixture to obtain a composition;
• forming an alloy liquid in a vacuum induction furnace and casting the liquid into an alloy ingot;
• processing the alloy ingot into spherical alloy powder;
• and
• melting and solidifying the spherical alloy powder by selective laser to obtain the multi-component high entropy alloy.