Preparation method of graphene-reinforced cobalt-based high-temperature alloy composite

Abstract

The invention discloses a preparation method of a graphene-reinforced cobalt-based high-temperature alloy composite. The preparation method of the graphene-reinforced cobalt-based high-temperature alloy composite comprises the following steps that (1) cobalt-based high-temperature alloy powder and graphene are prepared; (2) the cobalt-based high-temperature alloy powder and the graphene are mixedto obtain cobalt-based high-temperature alloy powder containing graphene; (3) the cobalt-based high-temperature alloy powder containing graphene is dispersed in absolute ethyl alcohol to prepare cobalt-based high-temperature alloy and absolute ethyl alcohol dispersing liquid; (4) the cobalt-based high-temperature alloy and absolute ethyl alcohol dispersing liquid is dried to obtain a dry powder material; (5) the powder material is ball-milled into powder; and (6) the powder obtained after ball-milling is placed into a steel capsule, the steel capsule is heated to the temperature of 500-800 DEGC, and heat preservation is conducted for 2-5 hours. By adoption of the preparation method of the graphene-reinforced cobalt-based high-temperature alloy composite, the problem that due to the largecharacteristic difference between graphene and a cobalt-based high-temperature alloy matrix, the graphene cannot be evenly dispersed in cobalt-based high-temperature alloy easily is solved, and a newdirection is pointed out for the development of cobalt-based alloy.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a graphene-reinforced cobalt-based superalloy composite material. Background technique [0002] Cobalt-based superalloys are austenitic superalloys with a cobalt content of 40-65%, and have certain high-temperature strength and good thermal corrosion resistance at 730-1100 °C. It is suitable for making guide vanes and nozzle guide vanes of aviation jet engines, industrial gas turbines, ship gas turbines and diesel engine nozzles. [0003] Cobalt-based superalloys have good thermal corrosion resistance, because the melting point of cobalt sulfide (such as Co-Co4S3 eutectic, 877 ° C) is higher than the melting point of nickel sulfide (such as Ni-Ni3S2 eutectic 645 ° C), and sulfur is in The diffusivity in cobalt is much lower than in nickel, and cobalt-based superalloys are superior to nickel-based alloys in terms of hot corrosion resistance. Ho...

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Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention provides a method for preparing a graphene-reinforced cobalt-based superalloy composite material, which solves the problem that graphene is not easily dispersed in cobalt-based superalloys, improves the performance of cobalt-based superalloys, and improves the cobalt-based superalloy. The anti-oxidation ability of cobalt-based superalloys and the performance of other aspects are improved and optimized, which broadens the application field of cobalt-based superalloys

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