Carbon-coated magneto-rheological fluid

Abstract

The invention discloses carbon-coated magneto-rheological fluid, which comprises magnetic particles, carrier liquid, a surfactant, a thixotropic agent, an antioxidant, a solid lubricant and a dispersant, wherein the magneto-rheological fluid comprises the following materials in percentage by mass respectively: 20 to 80 percent of the magnetic particles, 15 to 45 percent of the carrier liquid, 1 to 3 percent of the surfactant, 0.5 to 2 percent of the thixotropic agent, 0.5 to 2 percent of the antioxidant, 1 to 3 percent of the solid lubricant and 1 to 3 percent of the dispersant. The mass of the carbon-coated magneto-rheological fluid is very light; under the condition without a magnetic field, after standing for half a year, the carbon-coated magneto-rheological fluid has the settling amount not higher than 3 percent and has very high stability and mechanical properties; and an acid corrosion test proves that the carbon-coated magneto-rheological fluid has very strong inoxidability. Simultaneously, the shearing yield strength is not obviously reduced, and the null field viscosity index is obviously improved. The result of electron microscope scanning shows that the carbon-coated particles have better dispersity.

Description

technical field [0001] The invention is an intelligent magnetorheological fluid for intelligent vibration reduction (shock) of aerospace, machinery, vehicles, military industry or civil engineering structures. Background technique [0002] Magnetorheological fluid is a smart material with great application prospects. However, the main problems of magnetorheological fluid are easy precipitation, poor stability and high zero-field viscosity. How to improve the stability of magnetorheological fluid and reduce the zero-field viscosity is the focus of researchers. [0003] In view of the fact that the effect of ultrasonic dispersion is to attach active substances to the surface of carbonyl iron powder, we use carbon coating technology to improve the treatment of carbonyl iron powder. Carbon-coated carbonyl iron powder particles are a new type of nano-carbon / metal composite material, in which the surrounding graphite sheets are tightly arranged around the carbonyl iron powder par...

AI Technical Summary

Problems solved by technology

[0005] Technical problems: Usually magnetorheological fluid has poor anti-sedimentation, heavy quality, easy to oxidize, and high zero-field viscosity

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