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|Title: ||Characterisation of phase relations and properties in air-oxidised Ti3SiC2.|
|Authors: ||Low, IM|
|Issue Date: ||25-Sep-2007|
|Citation: ||Low, I. M., Wren, E., Prince, K. E., & Atanacio, A. (2007). Characterisation of phase relations and properties in air-oxidised Ti3SiC2. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 466(1-2), 140-147.|
|Abstract: ||The oxidation of Ti3SiC2 in air from 25 to 1450 degrees C is characterised by differential thermal and gravimetric analysis (DTA/TGA), X-ray diffraction (XRD), grazing-incidence synchrotron radiation diffraction (GISRD), neutron diffraction (ND), transmission electron microscopy (TEM), secondary ions mass spectroscopy (SIMS) and Vickers indentation. The diffraction results show that rutile formed at a temperature of similar to 750 degrees C. A glassy phase - formed at > 1000 degrees C - devitrified upon cooling to room temperature to form tridymite but crystallised to cristobalite at temperatures >= 1300 degrees C. Composition depth-profiling of the surface layer oxides by XRD, GISRD and SIMS revealed a graded distribution of phases (TiO2, SiO2 and Ti3SiC2) both at the nanoscale (<= 1100 degrees C) and microscale level (1200 degrees C), which is particularly distinct at the interfaces. The oxide layers also exhibit a graded variation in microhardness. © 2007, Elsevier Ltd.|
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