AES and MR characterization of sol-gel alumina films

作者：Vasconcelos Daniela C L; Nunes Eduardo H M; Vasconcelos Wander L^*

来源：Journal of Non-Crystalline Solids, 2012, 358(11): 1374-1379.

DOI：10.1016/j.jnoncrysol.2012.03.017

• Sol-gel
• Alumina films
• Dip-coating
• FTIR
• Auger electron spectroscopy

In this work we obtained sot-gel alumina coatings on AISI 304 stainless steel substrates. Alumina sols were prepared by using aluminum isopropoxide (Al) as precursor, acetic acid (HOAc) as catalyst, ethanol (C2H5OH) or isopropanol (C3H8O) as solvent, and water. The as-prepared solutions were deposited on stainless steel substrates by means of the dip-coating technique. The obtained composites were characterized by Fourier transform infrared spectroscopy (FTIR) and Auger electron spectroscopy (AES). We observed that the concentration of AI-O type bonds in the obtained alumina coatings depends on the solvent type used, temperature and peptization state of the sol, withdrawal speed, and number of dipping cycles. AES experiments showed that the interface formed between the alumina coating and substrate surface is in general formed by several layers of different chemical compositions.

• 出版日期2012-6-1