Thin Solid Films, Jan 1, 2013, Vol.527, p.200(5)
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.tsf.2012.08.007 Byline: Ina Uhlmann, Dominik Hawelka, Erwin Hildebrandt, Jens Pradella, Jurgen Rodel Keywords: Sol-gel; ZrO.sub.2; SiO.sub.2; Wear; Hardness; Crystal structure; Micro abrasion; Ball cratering Abstract: Sol-gel based wear resistant coatings are presented as an alternative to existing vapor deposition coatings. The films consist of zirconia which has been doped with 8wt.% silica. Crack-free single as well as multilayer coatings with thicknesses of 80 and 150nm, respectively, could be produced after sintering at 1000[degrees]C. The evolution of layer thickness, optical, chemical and mechanical properties during film annealing was investigated by ellipsometry, scanning electron microscopy, thermal gravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, nanoindentation and micro-abrasion. Micro-abrasion has been established as an easy and powerful tool to achieve first comparative abrasion data which could be correlated to hardness, Young's modulus and structure of the films. Above 600[degrees]C a tetragonal, oxide coating with a Young's modulus ranging from 80 to 90GPa, a hardness from 7 to 8GPa and an increased abrasion resistance was obtained. The film density reached 4.64g/cm.sup.3 with the mean refractive index n.sub.550nm lying between 1.88 and 1.93. Article History: Received 19 May 2011; Revised 3 August 2012; Accepted 3 August 2012
Silicon Dioxide -- Analysis ; Silicon Dioxide -- Mechanical Properties ; Thin Films -- Analysis ; Thin Films -- Mechanical Properties ; Hardness (Materials) -- Analysis ; Hardness (Materials) -- Mechanical Properties ; Zirconium Oxide -- Analysis ; Zirconium Oxide -- Mechanical Properties ; Crystal Structure -- Analysis ; Crystal Structure -- Mechanical Properties ; Zirconium -- Analysis ; Zirconium -- Mechanical Properties
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