Microstructure evolution and phase transformation of TiB2/SiC/B4C composites synthesized from Ti‐SiC‐B4C ternary system |
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| Authors: | Chao Wu Shihui Xie Yunkai Li |
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| Affiliation: | 1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, People's Republic of China;2. Jiangsu Bree Optronics Co., Ltd., Nanjing, People's Republic of China |
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| Abstract: | ![]()
Bulk TiB2/SiC/B4C composites have been synthesized from Ti‐SiC‐B4C ternary system with different Ti weight percentages via reactive hot pressing at 1800°C under an applied pressure of 30 MPa for 1.5 h. By Ti amount increasing, the flexural strength curve exhibited an “M‐like” tendency reaching the maximum value of 512.36 MPa for 30 wt.% Ti. Microstructural evolution of the composites from conterminously large matrix grains to finely clear‐edged particles was observed by scanning electron microscopy. The phase transformation and element diffusion were analyzed by XRD and Energy Disperse Spectroscopy. A hybrid reinforcing mechanism of fracture and crack deflection is proposed to illustrate the change in flexural strength. |
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| Keywords: | boron carbide ceramic‐metal systems hot pressing phase transformation |
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