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SiC納米顆粒對TA2微弧氧化涂層組織結(jié)構(gòu)及耐蝕性能的影響機制
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國家材料服役安全科學(xué)中心 北京科技大學(xué)

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TG561

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科技部重點研發(fā)計劃(項目號2017YFA0403400)


The Influence of SiC Nanoparticles on the Microstructure and Corrosion Behavior of Microarc Oxidation Coatings Formed on TA2 Alloy
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National Center of Material Service Safety,University of Science and Technology Beijing

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    摘要:

    為提高鈦及鈦合金防腐蝕、耐磨損等關(guān)鍵服役性能,本研究在TA2鈦合金表面制備微弧氧化陶瓷涂層,研究納米SiC顆粒的添加對微弧氧化涂層組織結(jié)構(gòu)及耐蝕性能的影響機制.結(jié)果表明,基礎(chǔ)電解液中SiC的加入能夠大幅度提高TA2微弧氧化涂層的厚度,且隨著電壓的升高,涂層的厚度和表面粗糙度也隨之增大,涂層表面的微孔尺寸隨著電壓的升高而逐漸增大,SiC的加入能夠有效地抑制微弧氧化涂層表面裂紋的產(chǎn)生；微弧氧化涂層的物相主要有高溫穩(wěn)定相金紅石及銳鈦礦,還含有少量的SiC及SiO2；微弧氧化涂層增加TA2的開路電位及自腐蝕電位,隨著處理電壓的增加開路電位隨著升高；SiC的加入降低了涂層的陽極電流密度,顯著提高了微弧氧化涂層得耐蝕性能。

    Abstract:

    In order to improve the anti-corrosion and anti-wear properties of titanium alloy, a microarc oxidation (MAO) coating was fabricated on the surface of TA2 alloy. The influences of SiC nanoparticles on the microstructure and corrosion behavior of MAO coatings were investigated. The results showed that the introduction of SiC nanoparticles into the base electrolyte increased the coating thickness of MAO coating. The thickness, surface roughness and micropore size of the coating increased with the increasing applied voltage. The microcracks in the coating was decreased by SiC particles. The phase composition of coatings consisted of rutile phase, anatase phase, SiC and SiO2. The OCP and corrosion potential was increased by MAO treatment. The introduction of SiC nanoparticles decreased the anodic current density, and thus increased the corrosion property of the alloy.

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楊斌,李敬洋,史開元,王志偉,文磊. SiC納米顆粒對TA2微弧氧化涂層組織結(jié)構(gòu)及耐蝕性能的影響機制[J].稀有金屬材料與工程,2018,47(12):3754~3760.[Yang Bin, Li Jingyang, Shi Kaiyuan, Wang Zhiwei, Wen Lei. The Influence of SiC Nanoparticles on the Microstructure and Corrosion Behavior of Microarc Oxidation Coatings Formed on TA2 Alloy[J]. Rare Metal Materials and Engineering,2018,47(12):3754~3760.]
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  • 收稿日期:2018-02-06
  • 最后修改日期:2018-02-26
  • 錄用日期:2018-05-18
  • 在線發(fā)布日期: 2019-01-04
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