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文章编号:1004-0609(2010)09-1788-07 PEO陶瓷层对铝基体上DLC薄膜承载特性的影响 高方圆1, 2, 李 光1, 夏 原1 (1. 中国科学院 力学研究所,北京100190； 2. 中国科学院研究生院,北京100049) 摘 要:重载作用下,类金刚石(DLC)薄膜直接应用于铝合金等软金属基体上易发生脆性破裂和剥离而导致过早失效.针对这一问题,以PEO陶瓷层作为承载层,采用有限元数值计算方法,对复合涂层在均布接触载荷作用下的应力场进行研究.结果表明:陶瓷层可明显降低DLC膜的表面拉应力和界面剪应力,起到了良好的载荷支撑作用；陶瓷层厚度对涂层表面拉应力,界面及基体内剪应力的分布有显著影响,其中陶瓷层厚度与接触半宽比为0.15~0.30时,涂层可以获得较为合理的表面和界面应力场,从而改善DLC膜在铝合金基体上的摩擦磨损性能......
and concentrations 图3 4 g/L浓度下不同尺寸HBN颗粒复合的PEO膜生长曲线和粗糙度变化曲线 Fig. 3 Growth curves (a) and surface roughness curves (b) of PEO coatings formed in electrolytes containing 4 g/L HBN particles with different sizes 图4 PEO复合膜质量增量随膜厚的变化情况及线性拟合 Fig. 4 Variation law and linear fit curve of mass increment of PEO coatings with different thicknesses 2.2 复合膜微观结构及元素分布 图5 不同尺寸HBN颗粒复合制备的PEO膜......
Antibacterial activities against Porphyromonas gingivalis and biological characteristics of copper-bearing PEO coatings on magnesiumDan Zhang1,Qi Han2,Kun Yu3,Xiaopeng Lu2,Ying Liu4,Ze Lu1,Qiang..., a series of composite coatings with different amounts of Cu O particles(3, 5 and 7 wt.%) were fabricated on pure magnesium through plasma electrolytic oxidation(PEO) to investigate in vitro......
Protective Composite Coatings Formed on Mg Alloy Surface by PEO Using Organofluorine MaterialsDmitry V.Mashtalyar1,2,Konstantine V.Nadaraia1,21. Institute of Chemistry, Far Eastern Branch, Russian.... Electrochemical, tribological properties and wettability of protective composite coatings have been investigated. Composite coatings formed on PEO-layer by fourfold treatment of samples in SPTFE......
of Mechanics, Chinese Academy of Sciences, Beijing 100080, China) Abstract: Amorphous [Al-Si-O] coatings were deposited on aluminum alloy by plasma electrolytic oxidation(PEO). The process parameters, composition, micrograph, and mechanical property of PEO amorphous coatings were investigated. It is found that the growth rate of PEO coatings reaches 4.44μm/min if the current density is 0.9mA/mm2. XRD......
Trans. Nonferrous Met. Soc. China 28(2018) 259-272 Tribological and corrosion behavior of PEO coatings with graphite nanoparticles on AZ91 and AZ80 magnesium alloys L. PEZZATO1, V. ANGELINI2, K... plasma electrolytic oxidation (PEO) coatings on AZ91 and AZ80 magnesium alloys was studied. The corrosion and wear resistances of the obtained coatings were investigated. A solution......
PEO及其与LiClO4复合体系的非等温结晶动力学 刘清泉1, 潘春跃2, 申少华1 (1. 湖南科技大学 化学化工学院 材料科学与工程系, 湘潭 411201; 2. 中南大学 化学化工学院 有机功能高分子研究所, 长沙 410083) 摘 要: 用示差扫描量热法(DSC)研究了聚氧化乙烯(PEO)及其与高氯酸锂(LiClO4)复合体系的非等温结晶过程. 依次用Jeziorny 方法, 一种结合Avrami和Ozawa 方程的方法分析了以上体系中PEO的非等温结晶过程, 得到了PEO在不同体系中非等温结晶时的动力学参数. 动力学参数表明LiClO4晶粒缩短了PEO的结晶时间, 使复合体系中PEO的结晶速率大于PEO体系的, 但PEO体系形成更完善晶体; 为使二者达到相同的相对结晶度, PEO体系需要更大的冷却速率. 结果表明, LiClO4晶粒能够有效地将PEO的......
aluminum alloy.Three coatings were prepared by the plasma electrolytic oxidation(PEO) process using 50-, 500-, and 1000-Hz pulsed direct current, respectively. The as-deposited coatings were then post...Self-Lubricating PEO Coating on an Al Alloy Produced by Vacuum Impregnation Post-treatmentLing Hong1,Guang-Dong Bian3,Lin-Lin Wang3,Shu-Gen Hu11. College of Mechanical Engineering, Zhejiang......
; accepted 26 August 2015 Abstract: Plasma electrolytic oxidation (PEO) ceramic coatings were fabricated in a silicate-based electrolyte with the addition of potassium fluorozirconate (K2ZrF6) on 6063 aluminum alloy, and the effects of current density on microstructure and properties of the PEO coatings were studied. It was found that pore density of the coatings decreased with increasing the current......
PEO/LiClO4复合体系中PEO的等温结晶动力学研究 潘春跃1,谢治民2,刘清泉3 (1.中南大学化学化工学院有机功能高分子研究所,长沙,410083;2.湖南工程学院化学化工系,湘潭,411200;3.湖南科技大学化学化工学院,湘潭,411201) 摘要:用差示扫描量热法研究了聚氧化乙烯(PEO)和PEO/LiClO4复合体系中PEO的等温结晶过程.用Avrami方程分析了PEO和复合体系中PEO的等温结晶动力学,得到PEO在不同体系中等温结晶时的动力学参数.PEO的Avrami指数n都趋近2.5,说明PEO晶体以三维方式依热成核生长.动力学参数表明,复合体系中的PEO以异相成核为主.LiClO4对PEO等温结晶过程的影响为:作为PEO结晶的成核剂而加快其结晶过程;增加了复合体系的粘度,缩短了PEO的半结晶时间,使其结晶总速率增大;降低了复合体系中PEO的绝对结晶度.PEO和......
