CAJ | 학술논문

以添加表面活性剂的水为溶剂，采用溶剂混合法制备纳米 Al2 O3填充聚四氟乙烯（PTFE）复合材料，研究其力学性能和摩擦学性能，并与乙醇中分别制备纳米 Al2 O3填充 PTFE 复合材料进行比较。结果表明：在相同 Al2 O3填充比例下，水中制备的复合材料的拉伸强度和硬度要低于乙醇中制备的复合材料，而断裂伸长率却要高于乙醇中制备的复合材料。在200 N 和干摩擦条件下，当纳米 Al2 O3质量分数为1％～5％时，水中制备的复合材料的磨耗量要低于乙醇中制备的复合材料，并较纯 PTFE 磨耗量下降了1～2个数量级；且水中制备的复合材料的摩擦因数也要低于乙醇中制备的复合材料。复合材料磨痕处 SEM显示复合材料的磨损机制为黏着磨损和磨粒磨损。
이첨가표면활성제적수위용제，채용용제혼합법제비납미 Al2 O3전충취사불을희（PTFE）복합재료，연구기역학성능화마찰학성능，병여을순중분별제비납미 Al2 O3전충 PTFE 복합재료진행비교。결과표명：재상동 Al2 O3전충비례하，수중제비적복합재료적랍신강도화경도요저우을순중제비적복합재료，이단렬신장솔각요고우을순중제비적복합재료。재200 N 화간마찰조건하，당납미 Al2 O3질량분수위1％～5％시，수중제비적복합재료적마모량요저우을순중제비적복합재료，병교순 PTFE 마모량하강료1～2개수량급；차수중제비적복합재료적마찰인수야요저우을순중제비적복합재료。복합재료마흔처 SEM현시복합재료적마손궤제위점착마손화마립마손。
Nanometer Al2 O3 filled PTFE composites were prepared in water containing surfactant and in ethanol,and their mechanical and tribological properties were investigated,respectively.The results show that the composites prepared in water exhibit lower tensile strength,lower hardness and higher elongation at break than that of composites prepared in ethanol at the same Al2 O3 contents.Under dry sliding condition of 200 N,the wear mass loss of the composites prepared in water,1 ~2 orders of magnitude lower than that of pure PTFE,is lower than that of the composites prepared in ethanol with Al2 O3 content in 1% ~5 %,and the friction coefficient of the composites prepared in water is also lower than that of the composites prepared in ethanol.The SEManalysis of the worn surfaces of the composites shows the wear mechanism of PT-FE composites is adhesive wear and abrasive wear.