Method of preparing silver-based electrical contact materials with fiber-like arrangement of reinforcing nanoparticles

A method for preparing a fibrous silver-based electrical contact material, comprising following steps of:

• (1) uniformly mixing reinforcement powder and matrix silver powder to obtain a mixture, and loading the mixture into a high power ball mill for ball grinding, wherein the reinforcement powder and the matrix silver powder are mixed according to a predetermined weight ratio by which silver coats on the reinforcement powder to form coated bodies and aggregates of the coated bodies are obtained after the high power ball grinding;
• (2) pouring a composite powder body, namely the aggregates of the coated bodies obtained from the step (1), and the matrix silver powder into a powder mixing machine to mix, wherein a weight ratio of the composite powder body to the matrix silver powder is counted according to constituents of desired preparation materials and a predetermined fiber size, and then obtaining a powder body;
• (3) processing the powder body obtained from the step (2) with cold isostatic pressing to obtain a green body;
• (4) sintering the green body obtained by the cold isostatic pressing;
• (5) processing the green body obtained by the sintering, with hot pressing;
• (6) processing the green body obtained by the hot pressing, with hot extruding, and generating a fibrous silver-based electrical contact material.