發(fā)布時(shí)間：2018-11-19 07:11

【摘要】：采用微弧氧化技術(shù),在電解質(zhì)溶液中添加蛇紋石微納米顆粒,在ZL109鋁合金表面原位生長(zhǎng)陶瓷層。對(duì)未添加和添加蛇紋石微納米顆粒制得的微弧氧化陶瓷膜層進(jìn)行掃描電鏡(SEM)、能譜(EDS)及X射線衍射(XRD)分析,并與鑄鐵試樣進(jìn)行摩擦磨損試驗(yàn),探究蛇紋石微納米顆粒對(duì)鋁合金微弧氧化陶瓷膜層成分及摩擦學(xué)性能的影響。結(jié)果表明:在電解液中添加蛇紋石微納米顆粒改變了微弧氧化陶瓷膜層的元素組成和相成分,在摩擦磨損試驗(yàn)中,微弧氧化膜層中的蛇紋石在摩擦能的作用下誘發(fā)了鑄鐵銷表面的內(nèi)氧化反應(yīng),在摩擦接觸微區(qū)形成了Mg Si O3、Fe2O3及Fe3O4復(fù)合陶瓷表面自修復(fù)層,提高了鑄鐵銷表面顯微硬度,降低了摩擦磨損過程中的摩擦系數(shù)和鑄鐵銷的磨損率。
[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.
【作者單位】： 大連海事大學(xué)輪機(jī)工程學(xué)院;
【基金】：交通部應(yīng)用基礎(chǔ)研究項(xiàng)目(2015-329-225-230)
【分類號(hào)】：TG174.4
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本文編號(hào)：2341502