Ballistic performance of liquid-phase sintered silicon carbide

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• 作者：Che-Yuan Liu ; Wei-Hsing Tuan ; Shih-Chieh Chen
• 关键词：A. Sintering ; C. Mechanical properties ; D. SiC ; E. Armor
• 刊名：Ceramics International
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：39
• 期：7
• 页码：8253-8259
• 全文大小：4929 K

文摘

The ballistic performances of liquid-phase sintered silicon carbide (SiC) specimens prepared by pressureless sintering were evaluated. Solid-state sintering additives were also used in preparation of additional SiC specimens for comparison purposes. SiC specimens prepared by adding solid-state sintering additives were also prepared for the purpose of comparison. With the addition of 10-15 wt % of Al₂O₃ and Y₂O₃, the strength and toughness of the liquid-phase sintered SiC (LSC) were higher than those of solid-state sintered SiC (SSC). Nevertheless, the hardness of LSC specimen tended to be lower. However, LSC specimens sintered at 1875 ¡ãC can pass the NIJ Level IV test. The microstructure observation provides direct evidence of the importance of hardness and toughness regarding ballistic performance. A performance index, the hardness/density ratio, is proposed to rank the ballistic performance on ceramics used for personnel armor applications.