Patent ID: 9287018
Filing Date: 2016-03-15
CPC Classification: C23C,H01B

Claim Text:
1. 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.