Mechanical properties of WC-10Co-CNT nano-cemented carbide

Abstract

Nanometer cemented carbide has a wide range of applications and prospects in the fields of machinery, metallurgy and industrial mold, based on its excellent mechanical performance. During the fabrication of WC-Co cemented carbide, the grains have high potential to grow up, how to manufacture the nano-cemented carbides with excellent comprehensive mechanical properties remains challenging. This paper demonstrates that the WC-10Co nano-cemented carbide combining with carbon nanotubes can realize enhanced the mechanical properties of nanomaterials. Ultra nanometer indentation tests are conducted to detect the hardness and elastic modulus of the nano-WC-10Co-CNT composite material. The key figure of merit of the CNT composite nano-material and its ability to refine the grains and to enhance the comprehensive performance are proved. We also envision that when the doping amount of CNT reaches to 0.7%, the performance of the nano CNT composite cemented carbide will degrade due to the exiting of free carbon.

Keywords:

• Nano cemented carbide
• carbon nanotubes
• mechanical properties
• doping amount

Additional information

Funding

This work was supported by the National Natural Science Foundation, China (Grant No. 51475147), and by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and by the Engineering Research Center for Structural and Functional Metal Matrix Composites in Henan Province. South Ural State University is grateful for financial support of the Ministry of Education and Science of the Russian Federation (grant No 9.5589.2017/8.9).