Study On The Heat Treatment Of Ti₃AlC₂ Ceramic Power And Corrosion Resistance Of The Block

Layered ternary ceramic material Ti3AlC2 because of its series of excellent performance, and then the years acclaimed. This paper mainly improved by the heat treatment process morphology of the sample, increased sample purity, and to study the heat treatment process on Ti3AlC2 ceramic powder purity and morphology, as well as corrosion resistance on bulk materials and corrosion mechanism analyzed.During the experiment the heat treatment temperature increased from 650? to 1150?, showed Ti3AlC2 powder after a heat treatment process, product purity and appearance both with increasing heat treatment temperature and has been significantly improved. When the heat treatment temperature reaches 1050?, the product Ti3AlC2 maximum percentage content, microstructure appears as lamellar structure, and are arranged in close order. This is mainly because with the increase of heat treatment temperature, the product is not fully reacted TiC, Al3 Ti, Ti2 AlC will continue to react Ti3AlC2 ceramics. If you continue to heat up, the heat treatment temperature reaches 1150? when, Ti3AlC2 will decomposition TiCx, and morphology will have sintering tendency. Therefore, the conclusion can be drawn experiment Ti3AlC2 in 1050? is the best heat treatment temperature.Corrosion test of Ti3AlC2 ceramic material included in the NaOH solution, HF and aqua regia solution static and electrochemical corrosion of two parts, the static corrosion showed Ti3AlC2 block weightlessness maximum corrosion rate is among the highest in aqua regia, and in 40% NaOH solution corrosion rate is minimized. In the HF corrosion of material in between, weight loss showed a linear growth, the performance of active dissolution process, the product after the reaction has a two-dimensional graphene class structure.The electrochemical corrosion results Ti3AlC2 bulk materials show that the sample in NaOH solution corrosion current minimum electrode potential maximum, mainly due to the NaOH solution can generate a stable oxide film, to protect the internal base no longer continue to corrode, so Ti3AlC2 in the NaOH solution corrosion weight loss in the least, the lowest rate of corrosion. The Ti3AlC2 corrosion current with the electrode potential increases in the HF solution, the performance of active dissolution process, the sample occurred intergranular corrosion. Dissolved Al atoms start off on a substrate, a hydroxyl group can form complexes with other atoms, and the material constituting the primary battery, accelerate the corrosion process. Ti3AlC2 block them in aqua regia, there has been too passive phenomenon and accelerate the corrosion process, corrosion weight loss maximum, the highest rate of corrosion, peeling severe corrosion. And accompanied by generation of hydrogen gas, hydrogen escapes while the sample surface would cause a lot of corrosion holes.With SHS by combustion synthesis of ceramic materials Ti3AlC2 has good corrosion resistance, it has a very broad application prospects in industrial production and people's daily lives.