铝合金表面蛇纹石复合微弧氧化膜层的制备及摩擦学性能
发布时间：2018-11-19 07:11
【摘要】：采用微弧氧化技术,在电解质溶液中添加蛇纹石微纳米颗粒,在ZL109铝合金表面原位生长陶瓷层。对未添加和添加蛇纹石微纳米颗粒制得的微弧氧化陶瓷膜层进行扫描电镜(SEM)、能谱(EDS)及X射线衍射(XRD)分析,并与铸铁试样进行摩擦磨损试验,探究蛇纹石微纳米颗粒对铝合金微弧氧化陶瓷膜层成分及摩擦学性能的影响。结果表明:在电解液中添加蛇纹石微纳米颗粒改变了微弧氧化陶瓷膜层的元素组成和相成分,在摩擦磨损试验中,微弧氧化膜层中的蛇纹石在摩擦能的作用下诱发了铸铁销表面的内氧化反应,在摩擦接触微区形成了Mg Si O3、Fe2O3及Fe3O4复合陶瓷表面自修复层,提高了铸铁销表面显微硬度,降低了摩擦磨损过程中的摩擦系数和铸铁销的磨损率。
[Abstract]:The ceramic layer was grown on the surface of ZL109 aluminum alloy in situ by adding serpentine microparticles into electrolyte solution by micro-arc oxidation technique. The microarc oxidation ceramic film prepared without adding and adding serpentine microparticles was analyzed by scanning electron microscope (SEM) (SEM), (EDS) and X-ray diffraction (XRD), and the friction and wear tests were carried out with cast iron samples. The effects of serpentine microparticles on the composition and tribological properties of aluminum alloy ceramic coatings were investigated. The results show that adding serpentine microparticles to the electrolyte changes the element composition and phase composition of the ceramic film. The internal oxidation reaction of cast iron pin surface was induced by serpentine in the micro-arc oxide film under the action of friction energy. The self-repairing layer on the surface of Mg Si O _ 3O _ 3Fe _ 2O _ 3 and Fe3O4 composite ceramics was formed in the micro-area of friction contact, which improved the microhardness of cast iron pin surface. The friction coefficient and wear rate of cast iron pin are reduced during friction and wear.
【作者单位】： 大连海事大学轮机工程学院;
【基金】：交通部应用基础研究项目(2015-329-225-230)
【分类号】：TG174.4
，
本文编号：2341502
[Abstract]:The ceramic layer was grown on the surface of ZL109 aluminum alloy in situ by adding serpentine microparticles into electrolyte solution by micro-arc oxidation technique. The microarc oxidation ceramic film prepared without adding and adding serpentine microparticles was analyzed by scanning electron microscope (SEM) (SEM), (EDS) and X-ray diffraction (XRD), and the friction and wear tests were carried out with cast iron samples. The effects of serpentine microparticles on the composition and tribological properties of aluminum alloy ceramic coatings were investigated. The results show that adding serpentine microparticles to the electrolyte changes the element composition and phase composition of the ceramic film. The internal oxidation reaction of cast iron pin surface was induced by serpentine in the micro-arc oxide film under the action of friction energy. The self-repairing layer on the surface of Mg Si O _ 3O _ 3Fe _ 2O _ 3 and Fe3O4 composite ceramics was formed in the micro-area of friction contact, which improved the microhardness of cast iron pin surface. The friction coefficient and wear rate of cast iron pin are reduced during friction and wear.
【作者单位】： 大连海事大学轮机工程学院;
【基金】：交通部应用基础研究项目(2015-329-225-230)
【分类号】：TG174.4
，
本文编号：2341502
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