Mn-Cu reverse ferromagnetic magnetostriction alloy

Abstract

The invention relates to a manganese-copper anti-ferromagnetic magnetostrictive alloy, which is characterized in that the invention is in a state of anti-ferromagnetic, the content of the manganese in the alloy is 30-100 percent by weight, the alloy is capable of being prepared through vacuum melting, and the directional solidification, the polycrystalline texture, the heat treatment and the pre-pressure are capable of improving magnetostrictive amount. The manganese-copper anti-ferromagnetic magnetostrictive alloy of the invention belongs to a non-ferromagnetism alloy, the strain in a polycrystalline state is capable of comparing with single crystal ferromagnetism magnetostrictive ferric-calcium alloy whose patent publication number is 02117462.8, and the invention is capable of further improving the mechanical properties and the performance of technical process of other alloys through adding other alloys.

Description

technical field [0001] The invention relates to a Mn-Cu antiferromagnetic magnetostrictive alloy. Background technique [0002] Magnetostrictive materials are intelligent materials, which have dual functions of sensing and driving, that is, the material itself can sense changes in the environment and make corresponding responses. In the fields of aviation, aerospace, mechanical electronics, biomedicine, transportation, national defense and daily life, have an important role. Both antiferromagnetic materials and ferromagnetic materials belong to magnetically ordered substances, and both have magnetostrictive effect. However, compared with ferromagnetic materials, due to the limitations of antiferromagnetic materials (the spontaneous magnetization displayed externally is 0 ), the research and application of antiferromagnetic materials are very limited, for example: ferromagnetic magnetostrictive materials Tb-Dy-Fe, Fe-Ga, etc. have entered the practical stage. Although the r...

AI Technical Summary

Problems solved by technology

Both antiferromagnetic materials and ferromagnetic materials belong to magnetically ordered substances, and both have magnetostrictive effect. However, compared with ferromagnetic materials, due to the limitations of antiferromagnetic materials (the spontaneous magnetization displayed externally is 0 ), the research and application of antiferromagnetic materials are very limited, for example: ferromagnetic magnetostrictive materials Tb-Dy-Fe, Fe-Ga, etc. have entered the practical stage

Although the research on the magnetostriction of antiferromagnetic materials began in 1959, most of the researches are compound materials, and the antiferromagnetic transition temperature is relatively low, and the magnetic field used is relatively large (> 2T).

[0003] Mn-Cu alloy is a typical antiferromagnetic alloy, its martensitic phase transition temperature is coupled with the antiferromagnetic phase transition temperature, and has good damping performance and machinability, and its damping performance is derived from its antiferromagnetic transformation. The induced face-centered tetragonal (FCT) martensitic twin boundaries, such as Sonoston alloys, have been used commercially, but no similar effects have been found on the magnetostrictive properties of Mn-Cu alloys in the antiferromagnetic state. Patents and Reports