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1.
PTFE-环氧树脂复合固体润滑膜的摩擦学性能研究   总被引:1,自引:0,他引:1  
以E-44环氧树脂为基料,再加入纳米级的FITE微粒以及定量的乙二胺交联剂制备了PTFE固体复合润滑膜,通过摩擦磨损实验和表面形貌测试探讨了PTFE的最佳添加量,并考察了石墨添加量对复合固体润滑膜的硬度等性能的影响.实验结果表明:PTFE固体润滑膜具有良好的摩擦性能,加入石墨粉末后其摩擦因数有所提高,其硬度明显提高,单位磨损量降低.  相似文献   

2.
纳米Al2O3对聚四氟乙烯工程材料性能的影响   总被引:12,自引:1,他引:11  
用压制和烧结的方法,制备了纳米Al2O3和聚四氟乙烯(PTFE)的复合材料。研究了纳米Al2O3粒子对PTFE的摩擦、磨损、硬度、耐冲击强度等性能的影响。结果表明:纳米Al2O3粒子不仅显著地提高了PTFE耐磨性,而且降低了PTFE的摩擦系数,同时使PTFE的硬度增大。对作用机理进行分析和探讨,提出了“纳米粒子在摩擦磨损表面产生富积及重新嵌入“的观点,为材料的改性研究提供参考。  相似文献   

3.
石墨及纤维填充聚四氟乙烯复合材料的摩擦学研究   总被引:1,自引:0,他引:1  
研究了在碳纤维(CF)和玻璃纤维(GF)混杂纤维改性PTFE复合材料中添加石墨(Gr)的力学性能和摩擦磨损性能,探讨纤维及石墨的润滑协同效应.结果表明,纤维填料的加入使得复合材料的拉伸强度和伸长率有所降低,但大大提高了复合材料的硬度,石墨的加入能够降低摩擦因数,提高耐磨损性能.14? 9%GF 2%Gr复合材料具有较好的摩擦磨损性能,磨损表面(SEM)形貌较光滑,改变了纯PTFE的磨损机制,高载荷下耐磨损性能更突出.3种填料在PTFE基体中起到了很好的协同作用,综合性能较优异,具有一定的应用价值.  相似文献   

4.
聚四氟乙烯工程材料的摩擦磨损性能研究   总被引:12,自引:1,他引:11  
用MPV-200型摩擦磨损试验机研究了干摩擦条件下磨损时间、滑动速度、载荷、填料等对聚四氟乙烯(PTFE)工程塑料摩擦磨损性能的影响,结果表明:PTFE材料的摩擦因数和磨损率先随速度的增大而减小,然后又随着速度的增大而增大;随磨损时间的增长而降低,最后趋于稳定值;另外,摩擦因数大体上随载荷的增大而减小,磨损量则随载荷的增大而增加;填料可将PTFE的磨损量降低2个数量级,其中石墨使PTFE的摩擦因数降低,玻璃纤维和碳纤维则增大了PTFE的摩擦因数,而MoS2对PTFE摩擦因数的影响较小。对PTFE工程塑料的摩擦磨损特性进行系统分析,为优化设计提供理论基础。  相似文献   

5.
以环氧树脂TGDDM和固化剂A及固化剂B为基体,添加聚四氟乙烯(PTFE)、石墨和碳纤维作为固体润滑剂,制备了一种环氧基耐热耐磨自润滑涂料。涂料在150℃×1h的条件下固化,研究了3种填料对涂膜性能的影响。结果表明,石墨能有效降低涂膜的摩擦因数和磨损量,但会降低涂膜的力学性能;过多的PTFE对涂膜的摩擦因数影响不大,但会急剧降低涂膜的耐磨性和力学性能;碳纤维使涂膜的摩擦因数增大,但对降低涂膜的磨损量和提高力学性能却十分有效。石墨、PTFE和碳纤维的最佳用量分别为20份、40份和30份。  相似文献   

6.
Ekonol/石墨/MoS2填料对PTFE力学和摩擦磨损性能的影响   总被引:3,自引:2,他引:1  
研究了Ekonol含量对Ekonol/石墨/MoS2/P,PTFE复合材料的力学性能、摩擦磨损性能的影响,以及滑动速度、载荷对材料摩擦磨损性能的影响;用扫描电子显微镜观察了复合材料磨损后的表面形貌,并探讨了其磨损机制。结果表明:加入填料降低了材料的拉伸强度和弯曲强度,但提高了弯曲模量和硬度;同时填料能提高材料的磨损性能,但使摩擦因数升高了;当Ekonol含量较低时,磨损机制为粘着磨损,随着填料含量的增加,Ekonol分散到基体中,起到了承载作用,阻止了PTFE基体的带状破坏,磨损机制为疲劳磨损和轻微的粘着磨损;摩擦因数随载荷的增大而减小,随滑动速度的增大而增大,在相同的滑动时间内,磨痕宽度随载荷和滑动速度的增大而增大。  相似文献   

7.
《轴承》2015,(5)
采用热模压工艺制备聚醚醚酮/聚四氟乙烯(PEEK/PTFE)复合材料,研究PTFE对复合轴承材料拉伸强度、邵氏硬度和摩擦学性能的影响。结果表明:随着PTFE含量的增加,摩擦因数显著降低,延长了轴承材料寿命。当PTFE含量为5%时,复合材料的拉伸强度为93 MPa,邵氏硬度为83,摩擦因数为0.19,磨损量为0.072mm3,综合性能最佳,满足水润滑轴承材料在力学、吸水性、长寿命等方面的要求。  相似文献   

8.
胡萍  姜明  汪巍  吴愧  李永强 《润滑与密封》2005,(6):64-66,99
采用x-射线衍射仪、扫描电镜、大型偏光显微镜、差热和失重分析仪等现代仪器对聚四氟乙烯(PTFE)基固体润滑剂材料的成分、组织结构和组分的物理化学性能及力学性能等进行了表征及分析。结果表明,PTFE、石墨、二硫化钼及铜粉颗粒尺寸均基本保持在30 μm内;碳纤维直径较均匀,基本保持在8~10μm,但长度不均匀;加入填料的固体润滑剂比纯PTFE吸水率高、熔融温度及分解温度低,且会引起氧化分解反应;吸水率大小顺序为:石墨>碳纤维>二硫化钼>PTFE≥铜粉;PTFE基复合材料的表面硬度基本是随着填料的加入量的增加而增加的;在PTFE树脂中加入无机填料均可明显提高其抗压强度,但并不是加入量越多,抗压强度提高越明显。  相似文献   

9.
采用共混-冷压-烧结-整形的工艺制备有机物填充聚四氟乙烯(PTFE)复合材料,考察相同含量的不同有机填料对PTFE复合材料力学性能和摩擦学性能的影响。结果发现,加入有机填料后,复合材料的拉伸强度降低,但硬度和压缩强度均提高;有机填料有效地改善了PTFE复合材料的摩擦学性能,其中,质量分数15%聚苯酯填充的PTFE复合材料减摩效果最好,质量分数15%聚酰亚胺填充的PTFE复合材料的耐磨损性能最优。相比之下,质量分数15%芳纶填充的PTFE复合材料摩擦磨损性能及力学性能最好,其耐磨损性能较纯PTFE提高了近400倍,而摩擦因数仅为纯PTFE的84%。其原因在于芳纶的加入有效地改变了摩擦机制,能形成均匀连续的转移膜,进而降低了磨损。  相似文献   

10.
不同填料氟橡胶复合材料高温性能研究   总被引:2,自引:0,他引:2  
为提高氟橡胶(FKM)高温性能,在FKM中分别加入相同质量分数的聚四氟乙烯(PTFE)、气相二氧化硅(SiO2)、纳米氧化锌(Nano-ZnO),采用机械共混法制备3种FKM复合材料;研究常温和160℃高温下3种填料对FKM复合材料力学性能的影响,结合三维形貌和扫描电镜微观形貌,分析FKM复合材料的摩擦磨损机制。结果表明:PTFE填料降低了FKM材料的力学性能,但可提高其高温摩擦性能;Nano-ZnO填料可提高FKM材料常温力学性能,但对高温力学及摩擦性能没有明显改善;Silica填料可显著改善FKM材料常温与高温条件下的抗磨减摩、抗拉伸撕裂等特性;160℃试验条件下,Silica填料可使FKM材料的拉伸强度提高31%,撕裂强度提高142%,摩擦因数降低52%,磨损量减少36.4%;在FKM中添加Silica可提高基体强度,高温摩擦时形成熔融层,使复合材料具有优异的耐磨性能。  相似文献   

11.
填料对超高分子量聚乙烯摩擦磨损性能的影响研究   总被引:5,自引:0,他引:5  
用MPV-200型摩擦磨损试验机和腐蚀磨损试验机,研究了MoS2,PTEF,石墨,玻璃纤维,碳纤维等填料对超高分子量聚乙烯(UHMW-PE)摩擦磨损性能的影响,结果表明:填充MoS2,PTFE,石墨可降低UHMW-PE的摩擦系数;而添加玻璃纤维则增大了UHMW-PE的摩擦系数,添加碳纤维对UHMW-PE的摩擦系数几乎无影响,同时,添加填料可使UHMW-PE的耐磨性显提高,其中石煌减摩抗磨效果最佳,超高分子量聚乙烯基体的和石墨填料的构成的复合材料,同超高分子量乙烯相比,不仅耐磨性大幅度提高,而且磨擦系数大大降低。  相似文献   

12.
研究碳纤维/聚四氟乙烯(CF/PTFE)、玻璃纤维/聚四氟乙烯(GF/PTFE)复合材料与氮化硅陶瓷配副在海水环境下的摩擦学性能与润滑机制,分析滑动速度对摩擦副海水润滑性能的影响规律。结果表明:在海水润滑条件下,随着滑动速度的增加,PTFE、CF/PTFE、GF/PTFE材料与Si3N4陶瓷配副时的摩擦学性能均有明显改善,摩擦因数与磨损率均呈显著降低的趋势,其中CF/PTFE复合材料表现出更为优异的摩擦学性能,在1 000 r/min滑动速度下摩擦因数低至0.026。磨损表面表征结果表明,在海水润滑条件下,PTFE基复合材料在摩擦过程中由于摩擦化学反应生成了润滑膜,可为摩擦副提供良好的润滑和减磨作用,从而减少摩擦磨损行为的发生。  相似文献   

13.
The friction and wear properties of polytetrafluoroethylene (PTFE) and its composites with fillers such as bronze, glass fiber, carbon fiber, carbon, graphite, and polymer were studied at ambient temperature and high temperature. The wear resistance and hardness were enhanced by the fillers. Results showed that the wear resistance of all composites was much higher than that of pure PTFE. Pure PTFE has the lowest friction coefficient at ambient temperature (temperature: 23 ± 2°C, humidity: 50 ± 10%) but highest friction coefficient at high temperature (above 100°C). The PTFE composite filled with bronze showed the best wear resistance at ambient temperature but the poorest wear resistance at high temperature. The carbon-graphite- or polymer-filled PTFE composite showed a lower friction coefficient and moderate wear resistance at both ambient and high temperature.  相似文献   

14.
PTFE对纤维增强尼龙66材料摩擦学性能的影响   总被引:1,自引:0,他引:1  
考察了玻璃纤维(GF)增强尼龙66复合材料的摩擦磨损性能,以及PTFE对复合材料摩擦学性能的影响,利用扫描电镜分析了磨损形貌。结果表明:15%GF增强尼龙复合材料的摩擦学性能改善不明显,而且磨损量高于纯尼龙;加入PTFE在摩擦过程中形成了转移膜,降低了玻璃纤维增强尼龙复合材料的摩擦磨损,改善了其摩擦学性能。  相似文献   

15.
In this article, we studied and explored the impact of viscoelasticity on the friction and wear behavior of pure polytetrafluoroethylene (PTFE), carbon–graphite PTFE composite, and glass fiber–MoS2 PTFE composite. Tests were carried out using a specific reciprocating tribometer for valve seal application. The worn surfaces of the PTFE composites and the transfer films formed on the counterface were examined with a scanning electron microscope (SEM). Experimental results revealed that the addition of filler materials was effective in reducing the wear volume in all composites studied. In addition, the friction coefficient and wear resistance showed high sensitivity to the viscoelastic behavior of the PTFE seal. SEM investigation showed that the incorporation of particulate fillers into the PTFE matrix could dramatically reduce and stabilize the transfer films to the counterface, so they largely decreased the wear of the PTFE composites.  相似文献   

16.
The friction and wear properties of Pb, PbO, Pb3O4, or PbS filled polytetrafluoroethylene (PTFE) composites sliding against GCr15 bearing steel under both dry and liquid paraffin lubricated conditions were studied by using an MHK-500 ring-block wear tester. The worn surfaces and the transfer films of these PTFE composites formed on the surface of GCr15 bearing steel were then investigated by using a scanning electron microscope (SEM) and an optical microscope, respectively. Experimental results show that filling Pb, PbO, Pb3O4 or PbS to PTFE can greatly reduce the wear of the PTFE composites, but the wear reducing action of Pb3O4 is the most effective. Meanwhile, PbS increases the friction coefficient of the PTFE composite, but Pb and Pb3O4 reduce the friction coefficients of the PTFE composites. However, the friction and wear properties of lead or its compounds filled PTFE composites can be greatly improved by lubrication with liquid paraffin, and the friction coefficients of the PTFE composites can be decreased by one order of magnitude. Optical microscope investigation of transfer films shows that Pb, PbO, Pb3O4 and PbS enhance the adhesion of the transfer films to the surface of GCr15 bearing steel, so they greatly reduce the wear of the PTFE composites. However, the transfer of the PTFE composites onto the surface of GCr15 bearing steel can be greatly reduced by lubrication with liquid paraffin, but the transfer still takes place. SEM examination of worn surfaces shows that the interaction between liquid paraffin and the PTFE composites creates some cracks on the worn surfaces of the PTFE composites; the creation and development of the cracks reduces the load-carrying capacity of the PTFE composites, and this leads to deterioration of the friction and wear properties of the PTFE composites filled with lead or its compounds under higher loads in liquid paraffin lubrication.  相似文献   

17.
The effect of a rare earth (RE) surface treatment on the mechanical and tribological properties of carbon fiber (CF) reinforced polytetrafluoroethylene (PTFE) composites was experimentally investigated. The tensile properties of the CF reinforced PTFE (CF/PTFE) composites treated with air oxidation and RE modifier were superior to those of untreated CF/PTFE composites, while RE treatment was most effective in promoting the tensile strength and strain at break of the CF/PTFE composite. The bending strength of the RE treated CF/PTFE composite was improved by about 16% compared with that of untreated composites, while 2% improvement was achieved by air oxidation. Under oil-lubricated conditions, RE treatment was more effective than air oxidation to reduce the friction coefficient and wear of PTFE composite. RE treatment effectively improved the interfacial adhesion between CF and PTFE. The strong interfacial coupling of the composite made CF not easy to detach from the PTFE matrix, and prevented the rubbing-off of PTFE, accordingly improved the friction and wear properties of the composite.  相似文献   

18.
聚四氟乙烯基超声电机转子摩擦材料性能研究   总被引:1,自引:0,他引:1  
制备聚苯酯、碳化硅微粉及玻璃纤维填充聚四氟乙烯基超声电机转子摩擦材料,研究填充剂对复合材料力学、摩擦学性能及超声电机机械特性的影响。结果表明:POB、玻璃纤维、碳化硅微粉均能提高PTFE复合材料的硬度、弹性模量和耐磨性。在本文研究的范围内,质量分数20%玻璃纤维填充的聚四氟乙烯复合材料具有较低的摩擦因数和磨损率,使用该复合材料时超声电机具有较低的堵转力矩和较高的空载转速,且运行稳定,噪声较低。  相似文献   

19.
以碳黑为填料制备了PTFE基复合材料,并研究了该复合材料在干摩擦条件下与不锈钢对摩时的摩擦磨损行为,并探讨其磨损机制。实验结果表明,碳黑/PTFE复合材料的摩擦因数随着碳黑含量的增加呈增加的趋势,其耐磨性能明显优于纯PTFE。当碳黑的质量分数为5%时,其抗磨性能最好。SEM观察发现纯PTFE的断面上分布着大量的带状结构,而填充了碳黑后,则未观察到这种带状结构,这说明碳黑有效地抑制了PTFE结构的破坏。对PTFE和碳黑/PTFE复合材料的摩擦表面的SEM观察发现,前者的摩擦表面分布着较明显的犁削和粘着磨损的痕迹,而后者的摩擦表面则平整光滑,这表明以碳黑作为填料可有效地抑制PTFE的磨损。  相似文献   

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