摘要
以苯并噁嗪树脂为浸渍剂,通过浸渍/碳化(PIC)工艺制备了炭/炭(C/C)复合材料,研究了该材料的密度分布和热力学性能,采用扫描电子显微镜观察了材料的微观结构,并与采用相同预制体的糠酮树脂基C/C复合材料进行了对比。结果表明,制备的苯并 嗪树脂基C/C材料密度分布均匀,树脂炭与纤维之间界面结合良好,拉伸强度为80.28MPa,弯曲强度为245.5MPa,在800℃条件下X-Y向导热系数为8.054W/(m·℃),Z向导热系数为4.081W/(m·℃),在1000℃条件下热膨胀系数为1.973×10-6/℃,与糠酮树脂基复合材料相比,拉伸、弯曲性能与其相当,导热系数、热膨胀系数比其高。苯并噁嗪树脂在制备C/C复合材料领域具有较好的应用前景。
Benzoxazine resin matrix C/C composite was prepared by PIC process with benzoxazine resin as impregnant,and its mechanical and thermal properties were tested and studied its microstructure under SEM.The results shown that the density distribution was uniform,and the interface between resin carbon and carbon fiber was bonded well,the tensile strength was 80.28 MPa,the bending strength was 245.5 MPa,the Thermal conductivity was 8.054 W/(m·℃)and 4.081 W/(m·℃)along radial and axial directions at 800℃,respectively,the thermal expansion coefficient was 1.973×10-6/℃at 1000℃.Compared with the furfural acetone resin matrix C/C composite,the tensile and bending properties were equal,and the thermal conductivity and thermal expansion coefficient were higher than that of the composite.The benzoxazine resin had a good application prospect in the preparation of C/C composite.
作者
刘明强
吴小军
邓小红
崔创
Liu Mingqiang;Wu Xiaojun;Deng Xiaohong;Cui Chuang(Xi'an Aerospace Composite Materials Institute,Xi'an 710025)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第1期97-101,共5页
New Chemical Materials
基金
国家自然科学基金(21676163).
关键词
苯并噁嗪
炭/炭复合材料
热力学性能
微观结构
benzoxazine resin
C/C composite
mechanical and thermal properties
microstructure
