Tham khảo tài liệu 'volume 18 - friction, lubrication, and wear technology part 22', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | There are no clear-cut trends for the effects of lubricants on the coefficients of friction. PTFE lubricants demonstrate the lowest static coefficients of friction at all temperatures when compared to metallic lubricants intercalated graphite SbSbS4 and CaF2 . However graphite powder can offer a lower static coefficient of friction than PTFE Fig. 10 and 11 . Fig. 10 Effect of lubricant and test temperature on the coefficients of friction of carbon fiber PEEK composites. a Static coefficient of friction. b Dynamic coefficient of friction Fig. 11 Effect of lubricant and test temperature on the coefficients of friction of carbon fiber PEEK composites. a Static coefficient of friction. b Dynamic coefficient of friction Coefficients of friction are expected to decrease with increasing thermal stability of the resin for example melt point Tg or continuous-use temperature . This trend is not well demonstrated by 30 carbon-fiber-reinforced PEEK PEK or HTX Fig. 12 . Fig. 12 Effect of test temperature on the coefficients of friction of 30 carbon-fiber-reinforced PEEK PEK and HTX composites. a Static coefficient of friction. b Dynamic coefficient of friction The coefficient of friction increased for the PTFE-lubricated carbon-fiber-reinforced PEEK composite with increasing temperature Fig. 13 . Fig. 13 Plot of coefficient of friction versus test temperature for .
