High-temperature mechanical properties of ZrB2/SiC/Si3N4 ceramic tool materials with dual composite architectures. Issue 1 (1st January 2022)

• Record Type: Journal Article
• Authors: Zhang, Jingbao; Xiao, Guangchun; Yi, Mingdong; Chen, Zhaoqiang; Zhang, Jingjie; Chen, Hui; Shang, Xizuo; Xu, Chonghai
• Is Part Of: Ceramics international. Volume 48:Issue 1(2022)
• Page Start: 1038
• Page End: 1046
• Publication Date: 2022-01-01
• Subjects: Ceramic tool materials -- Spark plasma sintering -- Dual composite architectures -- High temperature mechanical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.09.189
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: ZrB2 /SiC ceramic granules with uniform a size and spherical shape were prepared by spray drying technology. ZrB2 /SiC ceramic granules were added into ceramic matrix, and ZrB2 /SiC/Si3 N4 ceramic tool materials with double composite architectures were prepared by spark plasma sintering technology. The mechanical properties from room temperature to 1100°C were measured. The hardness, flexural strength and fracture toughness at room temperature are 18.0 GPa, 589.0 MPa and 5.93 MPa m 1/2, respectively. While the fracture toughness at 1100°C reach 6.1 MPa m 1/2 increase by 74.3% compared with the ceramic tool material without double composite architectures. At high temperature, the improvement of fracture toughness is due to the addition of ZrB2 /SiC ceramic granules that deflect the cracks and propagates along the boundary between the granules and the matrix, which greatly increase the path during the crack propagation process, thereby improving the fracture toughness of the ceramic tool material.