Microstructure and Mechanical Properties of Spark Plasma Sintered Si3N4/WC Ceramic Tools
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(11), 1868; https://doi.org/10.3390/ma12111868
Received: 10 May 2019
/
Revised: 29 May 2019
/
Accepted: 4 June 2019
/
Published: 10 June 2019
Silicon nitride (Si3N4) based ceramic tools exhibit good machinability in cutting materials such as gray cast iron, ductile iron, malleable cast iron, and superalloys due to excellent high-temperature mechanical properties. In this paper, high-performance Si3N4-based ceramic tools containing tungsten carbide (WC) and cobalt (Co) were studied. Effects of the WC content and Co content on mechanical properties and a microstructure of Si3N4-based ceramic materials were analyzed. Results showed that Si3N4-based ceramic material containing 10 wt % WC and 1 wt % Co had the best comprehensive mechanical properties at a sintering temperature of 1650 °C and holding time of 6 min, achieving Vickers hardness, fracture toughness, and room temperature bending strength of 16.96 GPa, 7.26 MPa·m1/2, and 1132 MPa, respectively. The microstructure of Si3N4-based ceramic tool material is uniform without obvious abnormal growth. The Si3N4-based ceramic tool was mainly composed of α-Si3N4, β-Si3N4, and WC phases.
View Full-Text
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Wang, Z.; Jia, J.; Cao, L.; Sun, N.; Wang, Y. Microstructure and Mechanical Properties of Spark Plasma Sintered Si3N4/WC Ceramic Tools. Materials 2019, 12, 1868. https://doi.org/10.3390/ma12111868
AMA Style
Wang Z, Jia J, Cao L, Sun N, Wang Y. Microstructure and Mechanical Properties of Spark Plasma Sintered Si3N4/WC Ceramic Tools. Materials. 2019; 12(11):1868. https://doi.org/10.3390/ma12111868
Chicago/Turabian StyleWang, Zhenhua, Jiheng Jia, Liyan Cao, Ning Sun, and Yulin Wang. 2019. "Microstructure and Mechanical Properties of Spark Plasma Sintered Si3N4/WC Ceramic Tools" Materials 12, no. 11: 1868. https://doi.org/10.3390/ma12111868
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
