Microstructure and Mechanical Properties of ZrB2-SiC-ZrSi2 Composites Fabricated by Spark Plasma Sintering
In this work, we fabricated ZrB2-SiC-ZrSi2 composites containing different fractions (0.5-5 vol.%) of ZrSi2 by spark plasma sintering at 1600 °C under a uniaxial pressure of 30 MPa. The addition effect of ZrSi2 on the composition, microstructure and mechanical properties of the composites were investigated. The results indicated that the densification of ZrB2-SiC-ZrSi2 composites could be enhanced along with the increase of the added fraction of ZrSi2, with its relative density reaching the maximum of about 85.6% when 3 vol.% of ZrSi2 was added. The hardness of the composites would decrease after the addition of ZrSi2 in the range of 960-1200 HV5. The flexural strength initially increased and then decreased with the addition of ZrSi2, reaching a maximum of about 330 MPa when 3 vol.% of ZrSi2 was added.
Yiwang Bao, Danyu Jiang and Jianghong Gong
C. Chen et al., "Microstructure and Mechanical Properties of ZrB2-SiC-ZrSi2 Composites Fabricated by Spark Plasma Sintering", Key Engineering Materials, Vol. 726, pp. 143-147, 2017