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SiO2粉体粒径对STF/Kevlar复合材料防刺性能的影响

, PP. 54-61

Keywords: 剪切增稠流体,粉体粒径,Kevlar织物,复合材料,防刺性能

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Abstract:

采用自制的不同粒径的SiO2粉体,利用球磨分散技术配制具有剪切增稠特性的SiO2/PEG200悬浮液流体(STF),并利用静态浸渍方法制备STF/Kevlar复合材料,研究了粉体粒径对流体体系流变性能和复合材料防刺性能的影响。结果表明,不同粒径SiO2粉体配制的悬浮液均具有明显的剪切增稠性能,当SiO2粉体质量分数相同时,流体体系的起始黏度、临界剪切速率、最大黏度均随着粒径的增大而减小。16层STF/Kevlar试样能承受24.0J锥体冲击,远远优于相同面密度的纯Kevlar试样,随着粒径的增加,试样的防锥刺性能提高。刀体冲击能量为13.0J时,STF/Kevlar试样的防刀刺性能优于相同面密度的纯Kevlar试样,随着粒径的增大,试样的被刺穿深度减小,主要表现为剪切断裂破坏。

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