上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (4): 490-493.doi: 10.1007/s12204-010-1083-2

• 论文 • 上一篇    下一篇

Investigation on Mechanism of the Improvement in Tribological Properties of Carbon Fiber Reinforced Polytetrafluoroethylene Composites by Surface Treatment

SHANGGUAN Qian-qian1,2 (上官倩芡), CHENG Xian-hua1 (程先华)   

  1. (1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. College of Information, Mechanical and Electronic Engineering, Shanghai Normal University, Shanghai 201418, China)
  • 出版日期:2012-08-30 发布日期:2012-11-16
  • 通讯作者: CHENG Xian-hua1 (程先华) E-mail:xhcheng@sjtu.edu.cn

Investigation on Mechanism of the Improvement in Tribological Properties of Carbon Fiber Reinforced Polytetrafluoroethylene Composites by Surface Treatment

SHANGGUAN Qian-qian1,2 (上官倩芡), CHENG Xian-hua1 (程先华)   

  1. (1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. College of Information, Mechanical and Electronic Engineering, Shanghai Normal University, Shanghai 201418, China)
  • Online:2012-08-30 Published:2012-11-16
  • Contact: CHENG Xian-hua1 (程先华) E-mail:xhcheng@sjtu.edu.cn

摘要： Tribological properties of polytetrafluoroethylene (PTFE) composites filled with differently surface treated carbon fibers (CF), sliding against GCr15 steel under dry sliding conditions, were investigated on a block-on-ring M-2000 tribometer. Experimental results reveal that rare earths (RE) surface treatment reduces the friction and wear of CF-reinforced PTFE (CF/PTFE) composites. Scanning electron microscopy (SEM) investigation of worn surfaces of CF/PTFE composites shows that cracks or pores are visible on the worn surfaces of untreated and air-oxidated composite, while no crack and very few pores present on the worn surface of REtreated composite. The fiber-friction-angling effect makes carbon fibers angled and oriented along the frictional shearing force, and finally parallel to the friction surface, which makes interfacial adhesion become a key factor to tribological properties of CF/PTFE composite. With strong interfacial adhesion between carbon fiber and PTFE after RE surface treatment, carbon fibers are not easily detachable from the PTFE matrix in the process of fiber-friction-angling, which prevents the rubbing-off of PTFE, and accordingly improves the friction and wear properties of the composite.

关键词: polytetrafluoroethylene (PTFE), carbon fiber, fiber-friction-angling effect, friction and wear, surface treatment

Abstract: Tribological properties of polytetrafluoroethylene (PTFE) composites filled with differently surface treated carbon fibers (CF), sliding against GCr15 steel under dry sliding conditions, were investigated on a block-on-ring M-2000 tribometer. Experimental results reveal that rare earths (RE) surface treatment reduces the friction and wear of CF-reinforced PTFE (CF/PTFE) composites. Scanning electron microscopy (SEM) investigation of worn surfaces of CF/PTFE composites shows that cracks or pores are visible on the worn surfaces of untreated and air-oxidated composite, while no crack and very few pores present on the worn surface of REtreated composite. The fiber-friction-angling effect makes carbon fibers angled and oriented along the frictional shearing force, and finally parallel to the friction surface, which makes interfacial adhesion become a key factor to tribological properties of CF/PTFE composite. With strong interfacial adhesion between carbon fiber and PTFE after RE surface treatment, carbon fibers are not easily detachable from the PTFE matrix in the process of fiber-friction-angling, which prevents the rubbing-off of PTFE, and accordingly improves the friction and wear properties of the composite.

Key words: polytetrafluoroethylene (PTFE), carbon fiber, fiber-friction-angling effect, friction and wear, surface treatment

中图分类号: