Dongtai Energy Saving Refractories Factory

Dongtai, China

Dongtai Energy Saving Refractories Factory

Dongtai, China
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Xu G.,Dongtai Energy Saving Refractories Factory | Song Y.,Dongtai Energy Saving Refractories Factory | He J.,Dongtai Energy Saving Refractories Factory | Cheng L.,Dongtai Energy Saving Refractories Factory | Xie Z.,Dongtai Energy Saving Refractories Factory
Naihuo Cailiao/Refractories | Year: 2013

TiC high temperature ceramics were prepared by spark plasma sintering method (firing at 1600°C for 5 min, 50 MPa), adding nano-TiC (0, 10%, 20%, 50% and 90%, in mass, the same hereinafter) into TiC micropowders (about 3 μm) in order to research the effect of nano-TiC on the sinterability and mechanical properties of TiC matrix. The sinterability, microstructure and mechanical properties were characterized by Archimedes method, SEM and indentation method, respectively. Effect of nano-TiC addition on the sinterability of TiC ceramics was discussed according to the changes on densification and microstructure, and its influence on mechanical properties was discussed according to the hardness and fracture toughness. The results show that the dispersity of nano-TiC in the matrix mainly impacts the sinterability and mechanical properties of TiC ceramics; a low nano-TiC addition (10%) leads to an excellent dispersity, improving the sinterability and mechanical properties of TiC ceramics; fine microstructures can be obtained by adding nano-TiC; with 10% nano-TiC, TiC ceramics have the highest fracture toughness, performing obvious toughening mechanisms such as crack deflection and bridging.

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