Oxidation behavior of porous Ti3SiC2 prepared by reactive synthesis
作者： Hui-bin ZHANG , Shu-yu SHEN , Xin-li LIU , Zhong-he WANG , Yao JIANG
DOI: 10.1016/S1003-6326(18)64821-6
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摘要: Abstract High-purity porous Ti3SiC2 with a porosity of 54.3% was prepared by reactive synthesis and its oxidation behavior evaluated under air in the temperature range from 400 to 1000 °C. Thermogravimetric analysis differential scanning calorimetry (TG-DSC), electron microscope (SEM), X-ray diffractometometry (XRD), energy dispersive spectrometer (EDS), Raman spectrum, BET surface area analysis, pore-parameter testing were applied studies kinetics, phase composition, micro morphology, structure parameters before after oxidation. The results showed that formation TiO2 oxidized products different modifications primary factor influencing resistance structural stability Ti3SiC2. Cracks observed samples full 400-1000 °C because growth stress thermal stress. At 400-600 °C, anomalous higher kinetics aberrant decrement pore size permeability attributed occurrence severe cracking caused anatase TiO2. raised temperatures over 600 phenomena alleviated rutile TiO2, but outward oxide scales detrimentally decreased connectivity
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