Surface modification of (Tb_(0.3)Dy_(0.7))Fe_(1.95) alloy by ion nitriding process  

作　　者：李扩社 李红卫 严辉 于敦波 王丰瀛 张世荣 张国成 

机构地区：[1]National Engineering Research Center for Rare Earth Materials,General Research Institute for Non-Ferrous Metals,and Grirem Advanced Materials Co.Ltd.,Beijing 100088,China [2]College of Materials Science and Engineering,Beijing University of Technology,Beijing 100022,China

出　　处：《Journal of Rare Earths》2009年第2期240-243,共4页稀土学报（英文版）

基　　金：supported by National High-Tech R&D Program (2006AA03Z106);Beijing Natural Science Foundation (2062012);National Natural Science Foundation (50801006)

摘　　要：Effect of ion nitriding modification on surface hardness, corrosion resistance and magnetostriction of （Tb0.3Dy0.7）Fe1.95 alloy was investigated. Results demonstrated that a 100-200 nm thick nitrided layer was formed on the sample surface by ion nitriding treatment, which improved obviously surface hardness, wear, and corrosion resistance properties of （Tb0.3Dy0.7）Fe1.95 alloys. The surface hardness was increased from HV587 to HV622 after ion nitriding at 650 K for 6 h. Furthermore, ion nitriding treatment had almost no influence on mag- netostrictive performance as the nitrided layer was quite thin and the treatment temperature was not too high. The results might provide us a new approach for surface modification of （Tb0.3Dy0.7）Fe1.95 alloy.Effect of ion nitriding modification on surface hardness, corrosion resistance and magnetostriction of （Tb0.3Dy0.7）Fe1.95 alloy was investigated. Results demonstrated that a 100-200 nm thick nitrided layer was formed on the sample surface by ion nitriding treatment, which improved obviously surface hardness, wear, and corrosion resistance properties of （Tb0.3Dy0.7）Fe1.95 alloys. The surface hardness was increased from HV587 to HV622 after ion nitriding at 650 K for 6 h. Furthermore, ion nitriding treatment had almost no influence on mag- netostrictive performance as the nitrided layer was quite thin and the treatment temperature was not too high. The results might provide us a new approach for surface modification of （Tb0.3Dy0.7）Fe1.95 alloy.

关 键 词：magnetostfiction ion nitriding surface modification （Tb0.3Dy0.7）Fe1.95 rare earths 

分 类 号：TG174.4[金属学及工艺—金属表面处理]