摘要
在电解液中加入不同浓度的焦磷酸铜对TC4进行微弧氧化处理,对微弧氧化层进行了粗糙度和显微硬度测试,通过扫描电镜(SEM)、X射线衍射仪(XRD)及摩擦磨损测试分析了焦磷酸铜浓度对微弧氧化层微观结构及磨损性能的影响。结果表明:加入2 g/L焦磷酸铜后,微弧氧化层表面孔隙增大,数量增多,但随焦磷酸铜浓度的继续增加,微弧氧化层表面孔隙减小,数量减少。随着电解液中焦磷酸铜浓度的增加,微弧氧化层的厚度增加,硬度减小,摩擦系数曲线波动减小,其中电解液中加入2 g/L焦磷酸铜时微弧氧化层的摩擦系数最小,微弧氧化层的摩痕宽度随着电解液中焦磷酸铜浓度的增加而减小,焦磷酸铜浓度为8 g/L时,由于铜元素的润滑作用,微弧氧化层的磨痕最轻微,磨痕宽度最窄。
Micro arc oxidation(MAO)of TC4 alloy was carried out by adding different concentrations of copper pyrophosphate to the electrolyte,the roughness and microhardness of the micro arc oxidation layers were tested,and the effects of copper pyrophosphate concentration on microstructure and wear properties of the micro arc oxidation layers were analyzed by means of scanning electron microscopy(SEM),X-ray diffractometer(XRD)and friction and wear test.The results show that after the addition of 2 g/L copper pyrophosphate,the surface pores of the micro arc oxidation layers increase and the quantity increases,but with the increase of copper pyrophosphate concentration,the surface pores of the micro arc oxidation layers decrease and the quantity decreases.With the increase of copper pyrophosphate concentration in the electrolyte,the thickness of the micro arc oxidation layers increases,the hardness decreases,and the fluctuation of friction coefficient curve decreases.When the addition of copper pyrophosphate into the electrolyte is 2 g/L,the friction coefficient of the micro arc oxidation layer is the minimum,and the wear scar width of the micro arc oxidation layers decreases with the increase of copper pyrophosphate concentration in the electrolyte.When the concentration of copper pyrophosphate is 8 g/L,the wear scar of the micro arc oxidation layers is the slightest and the width of the wear scar is the narrowest due to the lubrication of copper elements.
作者
魏敬鹏
高巍
程赵辉
要玉宏
金耀华
陈建
杨巍
WEI Jing-peng;GAO Wei;CHENG Zhao-hui;YAO Yu-hong;JIN Yao-hua;CHEN Jian;YANG Wei(School of Materials and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2021年第3期162-167,184,共7页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金面上项目(52071252)。
关键词
钛合金
微弧氧化
焦磷酸铜
硬度
摩擦性能
titanium alloy
micro arc oxidation
copper pyrophosphate
hardness
friction performance
