碳纤维/酚醛树脂体系Z-pin加捻拉挤工艺及其性能  

Pultrusion and properties of the twisted carbon fiber/phenolic resin Z-pin

作　　者：张向阳[1] 李勇[1] 褚奇奕 李吻[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《航空动力学报》2015年第7期1638-1644,共7页Journal of Aerospace Power

摘　　要：为了解决碳纤维/酚醛树脂体系Z-pin拉挤制品中的孔隙缺陷,实现耐烧蚀复合材料三维增强体的制备,在分析孔隙的形成与酚醛树脂的固化过程基础上,利用纤维加捻提高酚醛树脂固化压力进而改善Z-pin中的孔隙缺陷.研究表明:一定范围内,随着纤维捻度的增加,孔隙缺陷的尺寸与数量明显减少,Z-pin中树脂质量分数及可植入深度逐渐降低,而Z-pin抗压性能先提高后降低;碳纤维捻度为80捻/m时,Z-pin制品质量较好,树脂质量分数约为32%,可满足后续超声植入,常温下最大植入深度可达10mm.The main goal is to solve the pore defect of the pultruded carbon fiber/phenolic resin Z-pin and obtain the three-dimensional reinforcement of ablation resistant composite.On basis of the analysis of the pore formation and phenolic resin curing process,the twisted yarn was utilized to elevate the resin＇s inner pressure to eliminate the pore defects in Z-pin.The results showed that,along with the increase of the twist number within the specific range,the size and amount of pores declined obviously,and also the phenolic resin mass fraction and maximum insertion depth decreased,while the compressive property arose firstly and declined afterwards.When the twist number was 80twist/m,Z-pin of good quality was obtained with approximately 32% phenolic resin mass fraction,which can be used for ultrasonic insertion,with the maximum insertion depth up to 10 mm in room temperature.

关 键 词：碳纤维 酚醛树脂 Z-pin拉挤 加捻 力学性能 

分 类 号：V258[一般工业技术—材料科学与工程] TB332[航空宇航科学与技术—航空宇航制造工程]