摘要
The surface properties on both friction and wear resistance can be improved by Ti-ionimplantation.The results show that the significant effect has been obtained by high-dose(】10<sup>17</sup>cm<sup>-2</sup>)implantation.This condition can just be satisfied by a metal vapor vacuumarc（MEVVA）ion source.It works in pulse mode and delivers an intense pulse ion cur-rent up to 1 A,which leads to an average ion-beam current density of about
基金
supported by the Opening Laboratory of the Radiation Beam
Material Engineering of Bejing Normal University.
