2010•Cailiao kexue yu gongcheng xuebaoRequires access
Tribological Behaviors of Polytetrafluroethylene Composites Filled with Nano-ceramic Particles under Dry Friction Conditions
Chunxia He
Open publisher page 1 citations
Abstract
Friction and wear properties of polytetrafluroethylene(PTFE) composites filled with nano-SiC,SiC,Si_3N_4,AlN and TiN sliding against 45 carbon steel under dry friction conditions were studied by using an MM-200 wear tester,and the worn surfaces of the PTFE composites were examined by using a scanning electron microscope(SEM).Experimental results show that nano-TiN reduces the friction coefficient of PTFE,but nano-SiC and nano-Si_3N_4 increase the friction coefficient of PTFE.PTFE composites exhibit much better wear-resistance than that of pure PTFE,but the wear-reducing action of nano-AlN is the most effective,while that of nano-Si_3N_4 is the worst.The wear mechanisms of pure PTFE are mainly adhesive and fatigue wear,while the composites filled with nano-particles are characterized by adhesive wear,ploughing wear and plastic deformation in different degrees.