Showing papers by "Xianting Zeng published in 2004"
TL;DR: In this paper, the corrosion characteristics of EN composite coatings using electrochemical measurements were investigated using open circuit potential (OCP), electrochemical impedance spectroscopy and potentiodynamic test.
139 citations
TL;DR: In this article, it has been found that erosion resistance of TiAlN coatings depends not only on the coating chemistry, but also on the deposition conditions (microstructures).
Abstract: TiAlN coatings with different Al concentrations have been deposited on Ti–6Al–4V substrate by reactive magnetron sputtering and characterized by scanning electron microscopy, nanoindentation and solid-particle erosion testing. It has been found that erosion resistance of TiAlN coatings depends not only on the coating chemistry, but also on the deposition conditions (microstructures). TiAlN coatings demonstrate marked improvement in erosion performance with the best erosion resistance several times higher than TiN coating. The excellent erosion resistance results from a good combination of high hardness and good toughness.
81 citations
TL;DR: In this article, the fabrication and characterization of thick UV-patternable hybrid solgel films by spin coating using a modified sol-gel process is described. But the results are limited to a single spin coating step.
Abstract: We report on the fabrication and characterization of thick UV-patternable hybrid sol-gel films by spin coating using a modified sol-gel process. Thick coatings of 25 microns with crack-free surfaces can be produced by one spin coating step. Characterization using different techniques including atomic force microscopy, scanning electron microscopy and profilometry show both a smooth surface of optical quality and precise patterning with sharp vertical walls. Refractive index measurements by prism coupling and using a spectroscopic ellipsometer indicate high reproducibility of coating optical properties prepared by this procedure. Large refractive differences can be obtained by varying the process conditions, allowing the preparation of channel waveguide structures.
38 citations
TL;DR: In this article, the properties of the as-deposited Ti-Si-N nanocomposite films were measured by energy dispersive analysis of x rays, x-ray diffraction (XRD), and nanoindentation experiments, respectively.
Abstract: Ti–Si–N nanocomposite films with Si content between 0 and 13.5at.% were deposited by combined DC/RF reactive unbalanced magnetron sputtering. The composition, structure, and mechanical properties of the as-deposited Ti–Si–N films were measured by energy dispersive analysis of x rays, x-ray diffraction (XRD), and nanoindentation experiments, respectively. All of the Ti–Si–N films exhibited a higher hardness than pure TiN films deposited under similar conditions. The highest hardness (∼41GPa) was obtained in the film with Si content of about 8at.%. Ti–Si–N films also exhibited a higher resistance to plastic deformation (i.e., higher ratio H3∕E*2) than pure TiN. XRD patterns revealed that the as-deposited films were composed of cubic TiN crystallites with a preferential orientation of (111). With increase of RF power applied to the Si targets, the TiN (111) peak intensity or TiN crystallite size increased in the lower RF power range but decreased in the higher RF power range, showing a maximum at an RF power...
30 citations