Investigation on the effect of Al addition on synthesis of Ti3SiC2 nanostructure by Mechanical alloying – heat treatment method

Document Type : Research Paper

Authors

• N Atazadeh
• M Saeedi Heydari
• H.R Baharvandi
• N Ehsani

Abstract

In this study, the effect of Al addition in synthesis of Ti₃SiC₂ nanostrucure has been studied by mechanical alloying - heat treatment method and using the mixture of Ti, Si, C powders. The composition of 3Ti: 1.3Si: 2C: xAl (x= 0%, 0.5%, 1% and 1.5%) were used in order to evaluate the molar percent of aluminum in synthesis of Ti₃SiC₂ MAX phase. First the initial powders were weighed. Then, the powder mixtures were milled at the ball to powder ratio of 30:1 for 40 hours under argon atmosphere. After that they have been formed in pills under 200 MPa pressure. After the heat treatment of the samples at 1200 °C for 1 hour, an X-ray diffraction analysis was used to examine phase composition while a field emission scattering electron microscope equipped with an EDS spectrometer was utilized to observe the microstructure. The results indicate that the maximum amount of the synthesized Ti₃SiC₂ MAX phase is totally equal to 75wt.%  and it is related to the sample of 3Ti:1.3Si:2C:xAl (x= 1%) which heat treated at the temperature of 1200°C. It was also observed that the weight percentage of the Ti₃SiC₂ MAX phase has decreased in the reaction products by increasing of the molar percent of aluminum from 1 to 1.5 %.

Keywords

• MAX phase
• Ti3SiC2
• mechanical alloying - heat treatment
• molar percent of aluminum

20.1001.1.22285946.1396.8.30.2.3

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