Microstructure and mechanical properties of silicon carbide ceramics reinforced with multi-walled carbon nanotubes

International Conference on Mechanical Engineering, Automation and Control Systems 2015

机械制造;无线电电子学;计算机科学

Barmin, A.^1 ; Bortnikova, V.^1 ; Ivanov, A.^1 ; Kornev, V.^2 ; Lurie, S.^2 ; Solyaev, Y.^2

Keldysh Research Center, 8, Onezhskaya st., Moscow

125438, Russia^1

Institute of Applied Mechanics Russian Academy of Sciences, 7, Leningradsky ave., Moscow

125040, Russia^2

关键词: Elastic properties;    Exposure durations;    Intergranular phase;    Microstructure and mechanical properties;    Processing condition;    Reinforced silicon carbides;    Silicon carbide ceramic;    Ultrasonic techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/124/1/012142/pdf
DOI  :  10.1088/1757-899X/124/1/012142

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A microstructure, a composition and mechanical properties of multi-walled carbon of nanotube-reinforced silicon carbide ceramics were examined. The amount of carbon nanotubes was up to 1% wt. Samples was prepared by spark plasma sintering. It has been found that the optimal sintering temperature is 2000°C with an exposure duration of 5 minutes and a pressure of 50 MPa. The effect of the CNT mass fraction on the Young modulus of silicon carbide ceramics composites was investigated for different temperatures and processing conditions of samples using ultrasonic techniques. It has been established that Young's modulus of ceramics decreases due to addition of CNT. Elastic properties of the composites cross section were characterized using nano-indentation. It has been revealed that the stiffness of the ceramics intergranular phase decreases due to addition of CNT.