摘要
采用等离子体增强磁控溅射系统在奥氏体不锈钢表面沉积纯铬涂层,以达到表面强化的效果。通过改变基体直流偏压来调节离子能量,研究离子能量对涂层微观结构和力学性能的影响。采用XRD、SEM、纳米压痕仪、摩擦磨损仪等分别对纯铬涂层的微观结构和力学性能进行了表征。随着偏压增加,纯铬涂层致密度增加,结构由柱状晶向等轴晶转变,沉积速率线性下降,晶粒取向由(110)和(211)向(200)转变。其中,偏压为-25 V时,H/E*与H3/E*2分别为0.0302、0.0058,涂层的塑韧性最高,与基体结合性能最强,耐磨性最佳;且平均摩擦系数仅为0.39,磨痕截面积为61μm2。
Pure chromium layers were deposited on the surface of an austenitic stainless steel using a plasma enhanced magnetron sputtering system to achieve surface strengthening.The effects of ion energy adjusted by the DC bias of the substrate on the microstructure and mechanical properties of the coatings were studied.The microstructures and mechanical properties of the pure chromium coatings were characterized by XRD,SEM,nano-indenter,and friction and abrasion tester,respectively.With the increase in bias voltage,the density of the pure chromium coating became higher with a crystal structure change from columnar to equiaxed,which was accompanied by a linear decrease of the deposition rate,and the grain orientation transformed from(110)and(211)to(200).The H/E^*and H^3/E^*2 values of the coating were 0.0302 and 0.0058 when deposited at-25 V,respectively.This coating exhibited the highest plastic toughness,the strongest adhesion force with the substrate,and the best wear resistance with an average friction coefficient of only 0.39 and a cross-sectional area of wear track of 61μm^2.
作者
陈军
张泽
王宁
郭子鑫
卜佑森
洪常俊
申佳宁
吴武斌
CHEN Jun;ZHANG Ze;WANG Ning;GUO Zixin;PU Yousen;HONG Changjun;SHEN Jianing;WU Wubin(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)
出处
《辽宁科技大学学报》
CAS
2020年第3期172-178,共7页
Journal of University of Science and Technology Liaoning
基金
国家自然科学基金(51502126)
辽宁科技大学青年基金(2018QN12)
辽宁科技大学大学生创新创业训练计划(101462019144)。
关键词
直流偏压
纯Cr涂层
组织结构
力学性能
DC bias
pure chrome coating
microstructure
mechanical property
