Magnesium-assisted formation of metal carbides and nitrides from metal oxides
Source abstract
Abstract
Abstract A series of carbides (TiC, V 2 C, Mo 2 C) were synthesized by the corresponding metal oxides (TiO 2 , V 2 O 5 , MoO 3 ), CaC 2 and magnesium as starting materials in a stainless steel autoclave at 600 °C. Through similar processes, transition metal nitrides (TiN, VN and CrN) could also be produced by employing the corresponding metal oxides (TiO 2 , V 2 O 5 , Cr 2 O 3 ), NaNH 2 , and magnesium as starting materials at 550 °C. The FE-SEM image showed that the TiC sample was mainly consisted of flower-like microstructures. TEM image showed the other carbides (V2C, Mo2C) and the obtained nitride (TiN, VN, CrN) were consisted of nanoparticles. The possible synthesis mechanism of TiC had been described.
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