Preparation method for Ti3AlC2-strenghted Ag-based electrical contact material

Abstract

The invention provides a preparation method for a Ti3AlC2-strenghted Ag-based electrical contact material. The composite material is composed of Ti3AlC2 and an Ag base body. The mass percent of a Ti3AlC2 strengthening phase is 1%-70%. The Ti3AlC2-strenghted Ag-based electrical contact material is prepared by mixing Ti3AlC2 powder and Ag powder in proportion for 5 min-300 min, conducting cold press molding under the pressure ranging from 100 MPa to 900 MPa, and sintering a green body for 1-24 hours at a temperature ranging from 500 DEG C to 1000 DEG C in protective atmosphere or vacuum. The prepared Ag-based composite material has the beneficial effects of being high in compactness, uniform in structure, moderate in hardness, good in electrical conductivity, and the like.

Description

technical field [0001] The invention relates to a metal matrix composite material, specifically a Ti 3 AlC 2 Reinforced Ag-based electrical contact material and preparation method thereof. Background technique [0002] In the electrical and electronic industries, electrical contacts are important contact elements for turning on, breaking off and carrying current to ensure the normal opening and safety of electrical circuits. The performance and life of electrical contacts are directly related to the entire electrical equipment Safety and reliability (Ma Zhanhong et al. Kunming University of Science and Technology Journal. 2002, 272, 17-20), among which Ag-based electrical contact materials are widely used in low-voltage electrical appliances, household appliances, automotive appliances, aerospace appliances and other fields. Foreign institutions and enterprises started research in the field of electrical contact materials earlier (at the beginning of the last century). Som...

AI Technical Summary

Problems solved by technology

However, C burns seriously under the action of arc, which leads to the decrease of the arc wear resistance of the contact. Although increasing the content of C can improve the wear resistance, it weakens the strength and conductivity of the material, so the content of C in the Ag matrix is ​​generally The lower is about 3 to 5% (Liu Weili et al. Proceedings of the Tenth China-Japan Composite Materials Academic Conference. 2012, Chengdu, Sichuan, China, China Society of Composite Materials), the effect of saving silver is poor, and the cost is high

Therefore, these silver-based composite electrical contact materials have their own characteristics and shortcomings. Although they can partially replace Ag-CdO in some fields, they cannot completely replace the status of Ag-CdO universal contacts. Therefore, new environmentally friendly electrical contact materials R&D has a long way to go