Microstructure and mechanical properties of B4C matrix composites sintered with (TiB2+Al). (November 2020)

• Record Type: Journal Article
• Authors: Song, Qi; Zhang, Zhao-Hui; Yin, Shi-Pan; Hu, Zheng-Yang; Wang, Hao
• Is Part Of: Journal of physics. Volume 1676(2020)
• Publication Date: 2020-11
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1676/1/012046
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The B4 C matrix composites were obtained with the addition of (24.5 % TiB2 +2 % Al) using spark plasma sintering method at 1600 °C with the pressure of 80 MPa for 5 min. Compared with the monolithic B4 C ceramics, due to the (24.5 % TiB2 +2 % Al) additive in B4 C matrix composite, the densification temperature of B4 C matrix composite was obviously decreased and the flexural strength was significantly improved. The B4 C matrix composites exhibited the high flexural strength of 528 MPa, and a moderate Vickers hardness of 24.2 Gpa. The excellent flexural strength attributed to the second phases in the composites can prevent the cracks from extending and the energy disspation effect resulted from the intergranular fracture.