Growth of PEO ceramic coatings on AA 2024-T3 aluminium alloy

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Forero Sotomonte, S.^1 ; Blanco Pinzon, C.^2 ; García Vergara, S.^1

Universidad Industrial de Santander, Bucaramanga, Colombia^1

Instituto Colombiano Del Petróleo (ICP), Piedecuesta, Colombia^2

关键词: Aa 2024-t3;    Applied voltages;    Diffraction analysis;    Digital microscopy;    Measuring instruments;    Surface coatings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012037/pdf
DOI  :  10.1088/1742-6596/687/1/012037

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The growth of PEO ceramic coatings on AA 2024-T3 aluminium alloy in an aqueous Na2SiO3(10.5g/l), KOH (2.8g/l) solution at 310 and 400V for 500 and 710s, was investigated. The morphology, roughness and thickness of the coatings were determined by SEM, digital microscopy, XRD diffraction analysis and thickness measuring instrument. The results show that thicker coatings are produced with longer process times and high applied voltages. Due to the nature of the PEO process, the roughness of the surface coatings increases as the coating become thicker, due to the development of sparks. The coatings are porous, with a crater like morphology and they are mainly amorphous.