介质阻挡放电等离子体辅助球磨及其在材料制备中的应用

DIELECTRIC BARRIER DISCHARGE PLASMA ASSISTED BALL MILLING TECHNOLOGY AND ITS APPLICATIONS IN MATERIALS FABRICATION

简述了外场辅助球磨技术的发展及其在材料制备中的应用.介绍了近年来发展的介质阻挡放电等离子体(DBDP)辅助球磨新技术的基本原理和方法,阐述了DBDP辅助球磨利用等离子体的热效应、高能电子轰击效应和球磨机械力效应的协同作用,增强粉体在球磨过程中的组织细化、活性激活、化学反应等效果和机理.在此基础上,简要介绍了该方法在硬质合金、锂离子电池负极材料、储氢材料等制备中的应用.研究结果表明,采用DBDP辅助球磨制备上述材料,不仅极大提高了球磨方法制备材料的效率,而且通过形成独特的结构显著提高了材料的性能;此外,还有可能建立新的材料生产制备工艺.已取得的研究结果表明,DBDP辅助球磨技术在粉末材料细化、材料表面改性、机械合金化、复合材料制备和气固反应等方面具有巨大的潜力.

The development of external field assisted milling technologies and their application in materials fabrication have been briefly described. A recent developed milling method named as dielectric barrier discharge plasma assisted ball milling（DBDP-milling） was introduced. A combination of heating effect and high energy electron bombardment effect produced by plasma, as well as the milling mechanical effect was induced simultaneously in the DBDP-milling, which can effectively promote the powder refinement, activation and chemical reaction. On this basis, the DBDP-milling method was applied in the fabrication of cemented carbide, anode materials for lithium ion batteries, hydrogen storage materials, and so on. The studies have indicated that DBDP-milling could improve the efficiency of mill, produce unique structure and thus enhanced properties. In addition, DBDP-milling is also possible to establish a new material production process. Research results have demonstrated that the DBDPmilling method has a great potential in refinement, surface modification, mechanical alloying, composite fabrication and gas-solid reaction of powder materials for different applications.