钛合金表面两步法微弧氧化陶瓷层制备及性能研究
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摘要
采用两步法在Ti6Al4V合金表面进行微弧氧化实验,制备高性能改性层,在电参数和氧化时间一定的情况下,探究添加剂的投入顺序对微弧氧化陶瓷膜层的理化性能影响。用扫描电镜、XRD衍射仪、摩擦磨损试验机、电化学工作站分别观察组织形貌,分析相组成、耐磨性、耐腐蚀性以及膜层间的结合性能。结果表明:第一步添加Na_2B_4O_7,第二步添加Cr_2O_3时,膜层表面光滑平整;相组成中存在NaBH_4;膜层的耐磨性达到最佳,摩擦系数下降到0.3左右,两次膜层结合性能较好;腐蚀电位从-0.75上升到-0.65V。
In this paper,a two-step micro arc oxidation experiment was carried out,and a high-performance modified layer was prepared on the surface of Ti6 Al4 V alloy.Under the condition of certain electrical parameters and operation time,the effects of additive input sequence on the physical and chemical properties of micro arc oxide ceramic film were investigated.The histological morphology was observed by scanning electron microscopy,XRD diffractometer,friction and wear tester,and electrochemical workstation,and the phase composition,wear resistance and corrosion resistance were analyzed.The results showed that when Na_2B_4O_7 was added in the first step and Cr_2O_3 was added in the second step,the surface of the membrane was smooth and flat,and there was NaBH_4 in the phase composition.The abrasion resistance of the membrane layer reached the best,the friction coefficient dropped to about 0.3,the corrosion resistance was improved significantly,and the corrosion potential increased from-0.75 V to-0.65 V.
In this paper,a two-step micro arc oxidation experiment was carried out,and a high-performance modified layer was prepared on the surface of Ti6 Al4 V alloy.Under the condition of certain electrical parameters and operation time,the effects of additive input sequence on the physical and chemical properties of micro arc oxide ceramic film were investigated.The histological morphology was observed by scanning electron microscopy,XRD diffractometer,friction and wear tester,and electrochemical workstation,and the phase composition,wear resistance and corrosion resistance were analyzed.The results showed that when Na_2B_4O_7 was added in the first step and Cr_2O_3 was added in the second step,the surface of the membrane was smooth and flat,and there was NaBH_4 in the phase composition.The abrasion resistance of the membrane layer reached the best,the friction coefficient dropped to about 0.3,the corrosion resistance was improved significantly,and the corrosion potential increased from-0.75 V to-0.65 V.
引文
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[2] 林修洲,唐唯,杜勇,等.添加剂铬酸钾对TC4钛合金微弧氧化膜层性能的影响[J].电镀与涂饰,2013,32(7):35-37.
[3] 周鹏.超声辅助TC4合金微弧氧化涂层的制备与性能研究[D].太原:太原理工大学,2016.
[4] 张文井,丁桦,王凯.钛及钛合金剧烈塑性变形研究进展[J].钛工业进展,2017,34(3):1-8.
[5] 张瑞珠,韩林萍,唐明奇,等.钛合金微弧氧化陶瓷层及其复合膜层研究进展[J].人工晶体学报,2018,47(1):219-224,230.
[6] 李奇辉.纯镁表面液相电解渗硼及微弧氧化制备复合膜层的研究[D].兰州:兰州理工大学,2013.
[7] Luo Y,Ge S R.Fretting Wear Behavior of Nitrogen Ion Implanted Titanium Alloys in Bovine Serum Lubrication[J].Tribology International,2009,42(9):1373-1379.
[8] Elias C N.Biomedical application of titanium and its alloys[J].Biological Materials Science,2008,7(3):46-49.
[9] 葛延峰.硅酸钠浓度对铝合金微弧氧化起弧过程能量消耗的影响[J].中国有色金属学报,2013,23(4):950-956.
[10] 张勤.TC4钛合金微弧氧化复合陶瓷膜制备及性能研究[D].沈阳:沈阳理工大学,2011.