Friction and wear studies of polyimide composites filled with short carbon fibers and graphite and micro SiO2

✍ Scribed by Xin-Rui Zhang; Xian-Qiang Pei; Qi-Hua Wang

• Publisher: Elsevier Science
• Year: 2009
• Weight: 816 KB
• Volume: 30
• Category: Article
• ISSN: 0261-3069
• DOI: 10.1016/j.matdes.2009.04.002

✦ Synopsis

Polyimide (PI) composites filled with short carbon fibers (SCFs), micro SiO 2 , and graphite (Gr) particles were prepared by means of hot press molding technique. The friction and wear properties of the resulting composites sliding against GCr15 steel were investigated on a model ring-on-block test rig. Experimental results revealed that single incorporation of graphite and SCF significantly improve the tribological properties of the PI composites, but micro SiO 2 was harmful to the improvement of the friction and wear behavior of the PI composite. It is found that a combinative addition of Gr, SCF and micro SiO 2 was the most effective in improving the friction-reducing and anti-wear abilities of the PI composites. Research results also show that the filled PI composites exhibited better tribological properties under higher PV-product.