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高速電弧噴涂鋁基非晶納米晶復(fù)合涂層的組織及性能
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國(guó)家“863”計(jì)劃項(xiàng)目（2009AA03Z342）；國(guó)家自然科學(xué)基金項(xiàng)目（50905185）


Microstructure and Performance of Al-Based Amorphous and Nanocrystalline Composite Coatings Prepared by High Velocity Arc Spraying
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    摘要:

    采用自動(dòng)化高速電弧噴涂系統(tǒng)，將自行研制的粉芯絲材在AZ91鎂合金基體表面制備出2種Al基非晶納米晶復(fù)合涂層。采用掃描電子顯微鏡（SEM）觀察非晶納米晶復(fù)合涂層橫截面的微觀形貌，利用XRD對(duì)非晶納米晶復(fù)合涂層進(jìn)行結(jié)構(gòu)分析。結(jié)果表明，非晶納米晶復(fù)合涂層是由非晶相和晶化相共同組成，涂層致密，孔隙少。Al-Ni-Y-Co涂層的維氏硬度值為3117.6 MPa， Al-Ni-Mm-Fe涂層的維氏硬度值為3407.2 MPa，約為傳統(tǒng)Al-RE涂層的4倍左右，為AZ91鎂合金基體的5倍左右。電化學(xué)試驗(yàn)結(jié)果表明，Al-Ni-Y-Co、Al-Ni-Mm-Fe涂層的耐蝕性優(yōu)于傳統(tǒng)Al-RE涂層和AZ91鎂合金基體。

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    Al-Ni-Y-Co and Al-Ni-Mm-Fe amorphous and nanocrystalline composite coatings were prepared on the surface of AZ91 magnesium alloy by automatic high velocity arc spraying system. The microstructures of the composite coatings were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that the composite coatings compose of amorphous phases and crystalline phases. The composite coatings have a compact structure with low porosity. The Vickers microhardness HV of Al-Ni-Y-Co and Al-Ni-Mm-Fe coatings is 3117.6 MPa and 3407.2 MPa, respectively, which is about four times higher than that of the traditional Al-RE coatings and five times higher than that of the AZ91 magnesium alloy. The electrochemistry experimental results show that the corrosion resistances of the Al-Ni-Y-Co and Al-Ni-Mm-Fe amorphous and nanocrystalline composite coatings are superior to those of the traditional Al-RE coatings and AZ91 magnesium alloy.

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張志彬,梁秀兵,徐濱士,陳永雄.高速電弧噴涂鋁基非晶納米晶復(fù)合涂層的組織及性能[J].稀有金屬材料與工程,2012,41(5):872~876.[Zhang Zhibin, Liang Xiubing, Xu Binshi, Chen Yongxiong. Microstructure and Performance of Al-Based Amorphous and Nanocrystalline Composite Coatings Prepared by High Velocity Arc Spraying[J]. Rare Metal Materials and Engineering,2012,41(5):872~876.]
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  • 收稿日期:2011-05-25
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