1性聚酰亚胺的力学性能和摩擦磨损性能.pdf

第29卷第11期 2005年11月械工程材料 for Mechanical Engineering 碳纤维增强热塑性聚酰亚胺的力学性能和摩擦磨损性能王晓东,王筱,朱鹏。黄培(南京工业大学化学化工学院,江苏南京210009) 摘要:用电子万能试验机和摩擦磨损试验机考察了短切碳纤维(CF)增强热塑性聚酰亚胺(PI)复合材料的力学性能和摩擦磨损性能,并通过扫描电镜(SEM)观察磨损面微观形貌,从而确定其主要磨损机理。结果表明:短切碳纤维可以提高复合材料的抗压强度,但对抗拉强度和抗弯强度的增强效果不明显,而冲击强度会有所下降。适量碳纤维的加入可以有效改善材料的摩擦磨损性能,其中10%,%,但随CF含量进一步增大(最大达到30%),摩擦因数趋于稳定;材料磨损率随CF加入下降了一个数量级,其中10%CF填充PI的磨损率最低,×10_8cm3·N-1·m~。低含量碳纤维复合材料磨损机理以粘着磨损为主,而高含量时主要是磨粒磨损。关键词:聚酰亚胺;碳纤维;摩擦磨损;力学性能中图分类号: 文献标识码:A 文章编号:1000一3738(2005)11一0042一04 Mechanical Properties aIldTribological PerformaIlce of PlaStic Polvimide Reinforced bV Carbon Fibers WANGⅪ栅d吣g,WANG Xi舯,ZHU Peng,HUANG Pei (Nanjing University ofTechnology,Nanjing 210009,China) Abstr_act:The mechanical pmperties and tribologicalperfOmance ofthe posite reinforced by carbon fibres(CF) were invest遍ated by a universal test rrlachineand a tribo- wom surfaces were analyzed bySEM,and thenthemain wear mechanism wasdetemined. CF could increase pressive strength and decrease the impact strength, but had effect on the tension and bending strength. The tribological behaviors were alsoimproved byfilling apprOpriate content of tofiIling theCF,the frictioncoefficientof thematerials decreased frictioncoefficientoflO%CF reinforcedpOlyirnide was %of that of the pure polyimide, and thenbec锄e stable、)l,henCF c