A kind of lightweight foam mn-cu alloy high damping material and preparation method thereof

Abstract

The invention discloses a light foam Mn-Cu alloy high-damping material. The light foam Mn-Cu alloy high-damping material is a binary alloy formed by metal manganese and copper or a multicomponent alloy formed by manganese, copper and one or more of iron, nickel and aluminum. A preparation method of the light foam Mn-Cu alloy high-damping material comprises the following steps of mixing Mn-Cu alloy particles and a foaming agent evenly; putting mixed powder into a mold and conducting cold-press molding to obtain a blank body for standby application; conducting hot-press molding on the blank body to obtain a high-compactness blank body with the density greater than 80%; putting the high-compactness blank body into the mold, conducting foaming and then cooling, and finally obtaining the foam Mn-Cu alloy high-damping material with the uniform aperture. By means of the light foam Mn-Cu alloy high-damping material and the preparation method thereof, the defect that the density of a traditional high-damping Mn-Cu alloy is large is overcome; the damping property of the Mn-Cu alloy is effectively improved through the porosity and the high-density defect around cavities. Besides, by means of the method, the problems that the foaming temperature is high, the size distribution of pores is non-uniform and the technological operation is difficult are solved.

Description

technical field [0001] The invention relates to a foam-type lightweight high-damping material and a manufacturing method thereof, in particular to a lightweight foamed Mn-Cu alloy high-damping material and a manufacturing method thereof. Background technique [0002] Mn-Cu alloy is a typical twin interface relaxation type high-damping alloy, and its early commercial application was as a propeller for naval ships to reduce vibration. Since Japanese researchers developed the M2052 damping alloy (Mn-20Cu-5Ni-2Fe, at%) in 2000, the good machinability and high damping performance (maximum internal friction value of 0.06) of the Mn-Cu alloy has been favored by people. It has great potential application value especially in the fields of aerospace, mechanical engineering, biomedical engineering and instrumentation. However, for applications in the fields of aerospace structures and components that are relatively expensive in cost and operating costs, the high specific gravity of th...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a light foam Mn-Cu alloy high damping material and its preparation method. The high-density defects of the Mn-Cu alloy can effectively improve the damping performance of the Mn-Cu alloy. In addition, the powder metallurgy method is used to realize the preparation of the foamed Mn-Cu alloy high-damping material, which effectively overcomes the traditional porous material preparation methods including the melt foaming method. Problems such as high foaming temperature, uneven pore size distribution, and difficult process operation

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