Abstract
We report the mechanical and tribological properties of transparent conductive oxide CdO + SnO2 coatings. The films were deposited on glass substrates by the sol–gel technique using, as precursor solution, a mixture of CdO and SnO2 solutions obtained at room temperature. Depending on the Sn atomic concentration percentage values the X-ray diffraction patterns show three types of films constituted of (1) CdO + Cd2SnO4, (2) Cd2SnO4 and (3) Cd2SnO4 + CdSnO3 crystals. Reciprocal microfriction tests revealed that films with Cd2SnO4 phase have friction values in the range 0.48–0.51 and a low wear rate of ~5 × 10−5 mm3 N−1 m−1. Nanoindentation tests have shown an increment of the elastic modulus from 50 GPa for CdO + Cd2SnO4 films to 90 GPa for Cd2SnO4 films, while the hardest coating was the one constituted by Cd2SnO4 crystals with H = 5.7 GPa, comparable to the hardness and elastic modulus reported for ITO films.
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Acknowledgments
This work was supported by Consejo Nacional de Ciencia y Tecnología (CONACyT) under Project FOMIX-QRO-2012-C01-192880 and Instituto de Ciencia y Tecnología del Distrito Federal under Project ICyTDF/341/2010 and ICyTDF/258/2012. The authors also thank CONACyT for the PhD. fellowship awarded to C. J. Diliegros Godines and F. J. Flores Ruiz. Esteban Broitman acknowledges the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linköping University (Faculty Grant SFO-Mat-LiU # 2009-00971).
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Diliegros-Godines, C.J., Flores-Ruiz, F.J., Castanedo-Pérez, R. et al. Mechanical and tribological properties of CdO + SnO2 thin films prepared by sol–gel. J Sol-Gel Sci Technol 74, 114–120 (2015). https://doi.org/10.1007/s10971-014-3584-1
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DOI: https://doi.org/10.1007/s10971-014-3584-1