期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 108, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2022.105930
关键词
B4C; SiC; TiB2; Fracture toughness
资金
- National Science Foundation [1540027]
- US Army Research Laboratory Cooperative Agreement [W911NF-12-2-0022]
- US Army Research Laboratory Cooperative Agreement
In this study, the fracture toughness of B4C-SiC composites was improved by adding TiB2, and the influence of TiB2 on the microstructure and mechanical properties of the composites was investigated.
B4C-SiC composites can be used in many areas due to their superior properties. However, in order to be used as a body armor material in areas requiring high performance, their fracture toughness needs a degree of improvement. In this study, 0-20 wt% TiB2 was added to B4C-SiC samples that were consolidated at 1950 degrees C by spark plasma sintering method. The contribution of TiB2 to the microstructure, elastic and mechanical properties of B4C-SiC composites were investigated. The highest hardness was measured to be 29.5 GPa with 15 wt%TiB2 addition. The highest fracture toughness was 3.08 MPa.m(1/2) found at sample made with 10 wt% TiB2. Addition of 10 wt% TiB2 increased the fracture toughness by 28%, with only a 5% decrease in relative density. In addition, the fracture mode of B4C-SiC-TiB2 composites is intergranular due to the addition of TiB2.
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