纳米及微米石墨/聚四氟乙烯复合材料的力学与耐磨性能
Mechanical and Wear-resisting Properties of Nano-graphite and Micron-graphite/PTFE Composites
摘 要
用热压成型法分别制备了纳米、微米石墨填充聚四氟乙烯(PTFE)的复合材料,对纯PTFE和复合材料进行了硬度、耐磨性和拉伸试验,用SEM观察了拉伸断口形貌.结果表明:纳米和微米石墨均能提高复合材料的硬度和耐磨性,而复合材料的抗拉强度和断后伸长率均有所下降;纳米石墨/PTFE复合材料的硬度、耐磨性、抗拉强度和断后伸长率均比微米石墨/PTFE复合材料的高;当纳米石墨质量分数为7%时,复合材料的综合性能较好,当质量分数大于7%后,复合材料的断后伸长率迅速下降;纳米石墨与PTFE相容性较好,在PTFE中的分布均匀.
PTFE复合材料
力学性能
耐磨性能
graphite
PTFE composite
mechanical property
wear-resistance
Abstract
The composites of polytetrafluoroethylene (PTFE) filled with nano-graphite or micron-graphite particles were prepared by heating compression molding.The hardness,wear resistance and tensile strength of the PTFE composites were tested and the tensile fracture surfaces were observed by SEM.The results showed that the wear-resistance and hardness of the composites were improved when two kinds of graphite were filled in,but the tensile strength and elongation of the composites were decreased.Nano-graphite particles/PTFE composites had higher properties of wear resistance,hardness,tensile strength and elongation than these of micron graphite particles/PTFE composites.When the nano-graphite particles content was 7%,comprehensive properties of the composite was the best,but when it was higher than 7%,the elongation of the composites decreased quickly.The nano-graphite particles had relatively good compatibility with PTFE,and distributed uniformly in PTFE.
中图分类号 TB332
所属栏目 试验研究
基金项目 高等学校博士学科点专项科研基金资助项目(20060307002)
收稿日期 2008/1/14
修改稿日期 2008/5/6
网络出版日期
作者单位点击查看
备注顾红艳(1966-),女,江苏南通人,工程师,硕士.
引用该论文: GU Hong-yan,HE Chun-xia. Mechanical and Wear-resisting Properties of Nano-graphite and Micron-graphite/PTFE Composites[J]. Materials for mechancial engineering, 2009, 33(2): 16～18
顾红艳,何春霞. 纳米及微米石墨/聚四氟乙烯复合材料的力学与耐磨性能[J]. 机械工程材料, 2009, 33(2): 16～18
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