Abstract
The present work aimed to synthesis an ultrafine thermally excelled MoO3-V2O5 nanocomposite powders using mechanical milling synthesis technique at different time intervals. Spectroscopic characterizations like Powder X-ray diffraction (PXRD), Scanning Electron Microscope, Electron Dispersive X-ray Spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, Raman, optical absorption and Thermogravimetric and Differential Thermal Analysis were used to characterize the synthesised composite powders. The orthorhombic phases of MoO3 and V2O5 are revealed by the X-Ray peak profile demonstrates. The average crystalline sizes and lattice strain evaluated from XRD data and W-H plot calculations were found to be nearly equal. The qualitative information of the prepared nanocompositie is revealed from Raman analysis. The vibrational modes of Raman spectra also reveal the orthorhombic phases of the prepared Nanocomposite. The depositions of vanadium powders on molybdenum are revealed by SEM images. The fundamental modes of Mo=O and V=O and other functional groups were analysed by FT-IR. Thermogravimetry analysis and Differential Thermal Analysis (DTA) of MoO3-V2O5 revealed that, the composite is stable up to 670 °C with a insignificant weight loss. Hence the synthesised mixed lubricous oxide nanocomposite may be used as a solid lubricant at elevated temperatures.
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