Local oxynitriding of AZ31 magnesium alloy by atmospheric-pressure plasma treatment at room temperature

作     者：Kenta Nakazawa Tatsuki Ohashi Shotaro Saiki Shoichi Kikuchi 

作者机构：Department of Mechanical EngineeringFaculty of EngineeringShizuoka University3-5-1JohokuNaka-kuHamamatsu432-8561Japan Graduate School of Integrated Science and TechnologyShizuoka University3-5-1 JohokuNaka-kuHamamatsu432-8561Japan 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2022年第10卷第7期

页      面：1878-1886页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the Tanikawa Fund Promotion of Thermal Technology and the Light Metal Education Foundation 

主　　题：Magnesium alloy Oxynitriding Atmospheric-pressure plasma jet Hardness Surface modification Diffusion 

摘      要：A surface-hardening treatment for AZ31 magnesium alloy using an atmospheric-pressure plasma jet(APPJ)at room temperature was *** is a potential engineering material because it is lightweight;however,magnesium alloys are difficult to heat-treat because of their low flaming *** alloy specimens were irradiated with a localized atmospheric-pressure plasma jet generated by dielectric-barrier discharge for 180 s in *** APPJ excited oxygen and nitrogen molecules in the ambient air,resulting in the formation of an oxynitrided layer;oxygen and nitrogen diffusion layer,on the surface of the magnesium *** hardness and elemental distribution for the treated surface were *** top surface of the APPJ-treated magnesium alloy achieved a maximum hardness of 108 HV,which was~1.7 times greater than that of the untreated *** analysis using an electron-probe microanalyzer revealed strong oxygen and nitrogen signals corresponding to the hardened region of the magnesium alloy,meaning that the hardness increased as a result of the formation of the oxynitrided *** proposed APPJ treatment is a promising approach for locally hardening magnesium alloys without using a heat treatment.