A kind of graphite composite material and preparation method thereof

Abstract

The invention discloses a graphite composite material. The graphite composite material is composed of a graphite matrix and a copper-gold-zinc alloy layer on the surface layer of the graphite matrix,wherein the copper-gold-zinc alloy layer is obtained by alloying a copper coating, a gold coating and a zinc coating, and the copper-gold-zinc alloy layer is composed of the following components of, in percentage by weight, 15%-78% of the copper, 2%-55% of the gold and 20%-30% of the zinc. The graphite composite material adopts graphite as a substrate, and has the characteristics of low density, chemical stability, high temperature resistance, thermal shock resistance, self-lubricating property, 3D printing easiness and the like, the surface of the graphite is coated with the copper-gold-zincalloy layer, so that high gold degree, conductivity, high strength and good ductility of the copper-gold-zinc alloy are achieved, a synergistic effect is further generated between the graphite and thecopper-zinc alloy layer, so that the graphite composite material has wide application prospects; by regulating and controlling process parameters, the copper-gold-zinc alloy layer with the high golddegree and strong anti-color-change capability can be obtained, interface bonding is good, the coatings are uniform, and the components are controllable; and the graphite composite material is simplein process and low in cost, and can be suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a graphite composite material and a preparation method thereof. Background technique [0002] The crystal structure of graphite determines that it has many characteristics such as excellent high temperature resistance, thermal shock resistance, electrical conductivity, self-lubricating property, etc. In addition, graphite has good chemical stability at room temperature, is environmentally friendly and healthy, and has no radioactive pollution. Complicated handicrafts and artistic decorations are prepared by 3D printing technology, but the dark black surface color does not conform to the public's aesthetics, which limits its application in this field. In actual production, it is usually necessary to carry out surface treatment on the surface of graphite to improve the performance of graphite. Combining graphite with metal materials not only has the color o...

AI Technical Summary

Problems solved by technology

[0003] At present, the powder metallurgy method has been applied in industry, because the density difference between graphite and metal powder is too large, and the graphite powder has strong cohesion, poor dispersion, uneven mixing, and easy segregation, which limits its large-scale production; arc spraying The technology is to spray a metal layer on the surface of graphite. The prepared coating layer has poor discoloration resistance, unevenness, weak bonding force and high cost, which limits its further application; the latest research direction also includes electroplating, but electroplating Changing the thickness of the powder coating during the process will lead to drastic fluctuations in the system resistance, which cannot guarantee fixed process conditions. The process control is more troublesome and the cost is higher.

Images