"Ex Situ" concept for toughening the RTMable BMI matrix composites, part I:: Improving the interlaminar fracture toughness
"Ex Situ" concept for toughening the RTMable BMI matrix composites, part I:: Improving the interlaminar fracture toughness
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DOI：
10.1002/app.27868
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发表时间：
2008-08-05
影响因子：
3
通讯作者：
Xu, Yahong
中科院分区：
文献类型：
--
作者：
Cheng, Qunfeng;Fang, Zhengping;Xu, Yahong
航空级双马来酰亚胺基复合材料采用特殊制造的ES（TM）碳织物，采用新型非原位树脂传递模塑（RTM）技术进行增韧。以热塑性PAEK为增韧剂，研究了该技术的增韧机理和增韧效果。非原位RTM增韧复合材料的I型断裂韧性（G(IC)）比控制系统提高了3倍，II型断裂韧性（G(IIC)）提高了2倍。将未增韧的复合材料表示为控制系统。微观结构表明，在层间区发生了反应诱导的相分解和反转，导致热固性颗粒被PAEK相包围。连续PAEK相的塑性变形和断裂是提高断裂韧性的主要原因。研究了PAEK浓度对材料韧性提高的影响。(C) 2008 Wiley期刊有限公司
Aerospace-grade bismaleimide matrix composites was toughened based on a novel ex situ resin transfer molding (RTM) technique using a special manufactured ES(TM) carbon fabrics. The toughening mechanism and toughening effect by the technique are studied using thermoplastic PAEK as toughener. Mode I fracture toughness (G(IC)) of the composites toughened by ex situ RTM technique increased up to three times higher than that of the control system, and Mode II fracture toughness (G(IIC)) increased two times higher as well. The composite without toughening was denoted as control system. The microstructure revealed that a reaction-induced phase decomposition and inversion happened in the interlaminar region, which resulted in a particles morphology that showed the thermosetting particles were surrounded with the PAEK phase. The plastic deformation and rupture of the continuous PAEK phase are responsible to the fracture toughness improvement. And the influence of PAEK concentration on toughness improvement was also investigated. (C) 2008 Wiley Periodicals, Inc.