Abstract
Nanocomposites of UHMWPE/SiO2 are prepared by filling nano-scale SiO2 in UHMWPE (Ultra-high molecular weight polyethylene ).The effects of SiO2 contents , impact angle ,sand concentration ,impact velocity and particle size on the erosion Property of UHMWPE/SiO2 are studied by using the rotating disk erosion instrument. The erosion Property of UHMWPE/ SiO2 is compared with the pure UHMWPE and 45# steel. with the scanning electron microscope (SEM),The worn surface of UHMWPE composite is examed and the were mechanisms is discussed. It was found that when the content of SiO2 reaches 10% , the erosion rate of composite reaches the minimum ; The erosion of composite increased with the impact angle at first ,and then decreased . when the impact angle was 30°,the erosion rate reaches the maximun; The erosion rate of composite increased with the increase of the sand content, however ,when the sand content reaches about 1.92kg/m3 ,the increases tend started to become slow . The relationship between the impacting speed and the erosion rate is index function , when the content of SiO2 reaches 10%,the index of composites is 2.03 ; The erosion rate of composites increases with the increase of the particle size; When the content of SiO2 reaches 10%, compared with UHMWPE, the erosion rate of composites decreases by 30% and reaches one of sixteen of 45# steel. The important wear mechanism of is ploughing-cutting and breaking of cutting scrap for UHMWPE/SiO2 Elastic Composite Materials.
Key words
Ultra-high Molecular Weight Polyethylene /
Erosion /
Nanocomposites
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Guo Yuanjun;Xiao Hualin;Gao Yongyi;Hu Hui;LI Wenbin;Huang Weijiu.
Study on the Erosion Properties of UHMWPE/nano-SiO2 Composite Materials[J]. Journal of Vibration and Shock, 2009, 28(10): 122-125
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