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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Nd2O3 Particles Addition on the Crack Resistance of Micro-arc Oxidation Coatings on Cast Aluminum Alloy
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Effect of Nd2O3 Particles Addition on the Crack Resistance of Micro-arc Oxidation Coatings on Cast Aluminum Alloy

机译：添加Nd 2 O 3 颗粒对铸造铝合金微弧氧化膜层抗裂性能的影响

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摘要

Micro-arc oxidation coatings were fabricated on cast aluminum alloy in electrolytes with the Nd 2 O 3particles addition varying from 0 to 0.4 g/L. The microstructure, phase composition, corrosionresistance and thermal shock resistance of the coatings were characterized by Scanning ElectronMicroscopy (SEM), X-ray Diffraction (XRD), Electrochemical Workstation and Chamber ElectricFurnace, respectively. It was found that the size of the micropores on the surface of the coatingsincreased with the addition of the Nd 2 O 3 particles, while the number of micropores graduallydecreased. After the thermal shock tests, the holes on the coating surface decreased, and the coatingsbecame more compact with the addition of the Nd 2 O 3 particles; furthermore, the cracks also decreasedand even disappeared with an increase in the Nd 2 O 3 particle concentration, which proved that addingNd 2 O 3 particles in the electrolytes could substantially strengthen the thermal shock resistance of thecoatings. The results of the XRD analyses indicated that the coatings mainly consisted of γ-Al 2 O 3 ,SiO 2 and Si phases. In addition, the corrosion rate of the coatings decreased slightly with the additionof the Nd 2 O 3 particles; thus the corrosion resistance of the coatings was gradually improved.
机译：在铸铝合金上的电解质中制备了微弧氧化涂层，其中Nd 2 O 3的添加量为0至0.4 g / L。分别通过扫描电子显微镜（SEM），X射线衍射（XRD），电化学工作站和室内电炉对涂层的微观结构，相组成，耐腐蚀性和耐热冲击性进行了表征。发现随着Nd 2 O 3颗粒的加入，涂层表面的微孔尺寸增加，而微孔的数量逐渐减少。经过热冲击试验后，通过添加Nd 2 O 3颗粒，涂层表面的孔减少，涂层变得更致密。此外，随着Nd 2 O 3颗粒浓度的增加，裂纹也减少甚至消失，这证明在电解质中添加Nd 2 O 3颗粒可以大大增强涂层的耐热冲击性。 XRD分析结果表明，涂​​层主要由γ-Al2 O 3，SiO 2和Si相组成。另外，随着Nd 2 O 3颗粒的加入，涂层的腐蚀速率略有下降。因此，涂层的耐腐蚀性逐渐提高。

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