碳纤维增强尼龙1010的力学性能及其对摩擦磨损的影响

用碳纤维填充尼龙1010制备了碳纤维增强尼龙复合材料,并对碳纤维增强尼龙复合材料的力学性能和摩擦学性能进行了实验研究。力学实验结果表明:碳纤维增强使尼龙复合材料的拉伸强度、表面硬度增大,碳纤维增强尼龙材料的拉伸强度在20%碳纤维含量时达到最大值;碳纤维表面处理对尼龙复合材料的拉伸强度有很大影响,碳纤维表面氧化处理提高了碳纤维增强尼龙复合材料的拉伸强度。摩擦磨损实验表明:碳纤维增强尼龙复合材料的摩擦系数和磨损率与其拉伸强度和硬度有密切关系。随着拉伸强度和硬度的提高,尼龙复合材料摩擦系数和磨损率降低;摩擦系数和磨损率与拉伸强度具有反比关系,与材料硬度具有二次方程关系,与碳纤维填充量之间存在负指数变化规律。 

MECHANICAL PROPERTIES AND THEIR INFLUENCE ON THE FRICTION AND WEAR OF THE CARBON FIBERS REINFORCED POLYAMIDE 1010

The nylon composites were prepared with the polyamide 1010 reinforced by shorten PAN carbon fibers. The tensile strength and surface hardness were measured for the carbon reinforced nylon composites in different CF contents. It was found in this study that the carbon fibers reinforcements enhanced the tensile strength and hardness, and reduced the friction coefficients and wear rates of the nylon composites compared with the neat nylon materials. The maximum tensile strength in value of 82 MPa was obtained when the carbon fibers were filled in 20 vol%. The linear relation between hardness and tensile strength of the carbon fibers reinforced nylon composites was presented after making regression of the experimental data. The test results in this paper showed that the oxidized treatment on carbon fiber surface greatly improved the felting property of carbon fibers in nylon substrates. Therefore, the tensile strength of the oxidized carbon fiber reinforced nylon composites was about 10% higher than that filled with the untreated carbon fibers. The experiments of the wear of nylon composites against carbon steel revealed that the composite's friction coefficients and wear rates were closely in relation to the tensile strength and hardness. When the tensile strength or hardness increased, the friction coefficients and wear rates decreased. The mathematical analysis stated that the friction coefficients and wear rates were inversely proportional to the tensile strength of the nylon composites. However, they had a second order polynomial equation to the hardness. The friction coefficients and wear rates changed with the carbon fiber contents in a decay exponent curve.