纳米Si_(3)N_(4)对TC4钛合金微弧氧化层微观结构和性能的影响  

Influence of Si_(3)N_(4) Nanoparticles on Microstructure and Properties of Microarc Oxidation Coatings on TC4 Alloy

作　　者：高巍[1] 刘江南[1] 丁智松 张勇 要玉宏[1] 杨巍[1] Gao Wei;Liu Jiangnan;Ding Zhisong;Zhang Yong;Yao Yuhong;Yang Wei(School of Materials Science and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学材料与化工学院,陕西西安710021

出　　处：《稀有金属材料与工程》2022年第5期1537-1542,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(52071252);Key Research and Development Program of Shaanxi Province(2021ZDLSF03-11,2021GY-208)。

摘　　要：在基电解液中加入氮化硅纳米颗粒,对TC4钛合金进行微弧氧化(MAO)处理,研究了Si_(3)N_(4)浓度对微弧氧化层表面形貌、耐蚀性和耐磨性的影响。添加Si_(3)N_(4)的MAO层呈现多孔结构,当Si_(3)N_(4)浓度为1 g/L时,涂层厚度最大,且经过7 d的酸腐蚀试验,该涂层的耐蚀性良好,腐蚀速率最低,约为0.057 mg·cm^(−2)·d^(−1)。随着Si_(3)N_(4)的加入,MAO涂层的抗菌性能先升高后降低。当Si_(3)N_(4)的添加量为1 g/L时,该MAO层的抗菌性能最好。Si_(3)N_(4)的加入能明显提高涂层在模拟海水中的耐磨性。当Si_(3)N_(4)的添加量为3和4 g/L时,所得涂层的摩擦系数低且稳定,且添加3 g/L Si_(3)N_(4)制备来的MAO涂层表现出优异的耐磨性。TC4 titanium alloy was treated by microarc oxidation(MAO)with adding Si_(3)N_(4)nanoparticles into the base electrolyte.The effect of the Si_(3)N_(4)content on the surface morphology,corrosion resistance,and wear resistance of the coatings was studied.The results show that MAO coatings with Si_(3)N_(4)addition present the porous structure,and the coating is the thickest when the Si_(3)N_(4)content is 1 g/L.The coating with the addition of 1 g/L Si_(3)N_(4)after acid corrosion test for 7 d shows excellent corrosion resistance with the lowest corrosion rate of about 0.057 mg·cm^(−2)·d^(−1).With the addition of Si_(3)N_(4),the antibacterial property of MAO coatings is firstly increased and then decreased,which is optimal when the Si_(3)N_(4)addition is 1 g/L.The Si_(3)N_(4)addition can obviously enhance the wear resistance of the coatings in the simulated seawater.When the Si_(3)N_(4)addition is 3 and 4 g/L,the friction coefficient of MAO coatings is low and stable.In addition,MAO coating with the addition of 3 g/L Si_(3)N_(4)shows the excellent wear resistance.

关 键 词：TC4钛合金 微弧氧化 Si_(3)N_(4)纳米颗粒 微观结构 性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]