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TRIBOROGICAL PROPERTIES OF CARBON TYPE COMPOSITES WITH FRICTION-MODIFYING FUNCTION

具有减摩功能的碳类复合材料的摩擦性能

基本信息

批准号：
09650171
负责人：
SASAKI Masami
金额：
$ 1.66万
依托单位：
TOKAI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

This study describes tribological characteristics of carbon-type composite materials particle mixed composite (A) and fiber reinforced composite (B). Especially, carbonized products, so-called Carbon Precursor, which prepared from thermosetting resin named COPNA (Condensed Polynucleus Aromatic Resin) at about 500ﾟC were payid attention to intermediate materials between organic and inorganic substances. The COPNA resin were prepared from Fluorene(fused polycyclic hydrocarbon) and 1,4-benzendimethaaol with p-toluenesulfonic acid as a catalyst. The cured resin at 210ﾟC and the carbonized product at about 500ﾟC were analysed by IR, TGA, GC-MS to study the polymerization process and initial carbonization process.(A) Particle mixed composite (non-porous material)Two series of flat testing specimens were prepared from Fluorene-based COPNA resin(FC), above-mentioned, and commercial pitch-based COPNA resin (5K) composites filled with 0-40 mass% graphite. Their lubricating properties such as the … More dependence of friction coefficient on load, sliding speed and temperature, were evaluated, using a cylinder/plate type tribometer.Main results are as follow. (1) The load carrying capacity increases and the friction coefficient(mu) decreases with graphite filled content : min. mu=0.04 for FC composite and mm. mu =0.03 for SK composite. (2) Both PC and SK composites give higher limitting PV values, l0-20 MPa m/s, than others reported. (3)The friction of the FC composite increases abruptly at about 300ﾟC during increasing of temperature, but that of the carbonized product holds with a lower value, mu <0.05, up to 550ﾟC.(4) Some very thin films with modified graphite on the rubbing surfaces are observed in good lubrication conditions. This indicates it is expectable to be a bearing material of lower friction. Under oil lubrication, however, the carbonized composite showed higher friction and excessive wear because of less compatibility against oil.(B) Fiber reinforced composite (porous material)Flat testing specimens were prepared from carbon fiber paper and COPNA resin . Their friction behaviors such as the dependence of friction coefficient on load, sliding speed and temperature, were evaluated, under non-lubrication and oil lubrication condition , using above- mentioned tribometer.Both cured and carbonized composites showed great friction change with load, speed, and temperature under non-lubrication condition. Especially, the carbonized composite has higher and more stable friction properties than the cured composite, but the weak point was less mechanical strength in relation to anti-wear property Less

本研究描述了碳型复合材料颗粒混合复合材料（A）和纤维增强复合材料（B）的摩擦学特性。特别是由热固性树脂COPNA（缩合多核芳香树脂）在500℃左右制备而成的碳化产品，即所谓的碳前驱体，作为介于有机物和无机物之间的中间材料而受到关注。以芴（稠合多环烃）和1,4-苯二甲醇为原料，以对甲苯磺酸为催化剂制备了COPNA树脂。通过IR、TGA、GC-MS对210℃的固化树脂和约500℃的碳化产物进行分析，以研究聚合过程和初始碳化过程。（A）颗粒混合复合材料（无孔材料）由上述芴基COPNA树脂（FC）和商业沥青基COPNA树脂（5K）复合材料制备了两个系列的平面测试样品 0-40质量％石墨。使用圆筒/板式摩擦磨损试验机评估了它们的润滑性能，例如摩擦系数对负载、滑动速度和温度的依赖性。主要结果如下。 (1)随着石墨填充量的增加，承载能力增大，摩擦系数(μ)减小：min。 FC 复合材料和 mm 的 mu=0.04。对于 SK 复合材料，mu =0.03。 (2) PC 和 SK 复合材料都比其他报道的复合材料给出了更高的 PV 极限值，l0-20 MPa m/s。 (3)FC复合材料的摩擦力在温度升高过程中在约300°C时突然增加，但碳化产品的摩擦力保持较低值，μ<0.05，直至550°C。(4)在良好的润滑条件下，摩擦表面上观察到一些非常薄的改性石墨膜。这表明它有望成为一种较低摩擦的轴承材料。然而，在油润滑下，碳化复合材料由于与油的相容性较差而表现出较高的摩擦力和过度磨损。(B)纤维增强复合材料(多孔材料)由碳纤维纸和COPNA树脂制备平面测试样本。使用上述摩擦试验机，在无润滑和油润滑条件下评估了它们的摩擦行为，例如摩擦系数对载荷、滑动速度和温度的依赖性。在无润滑条件下，固化和碳化复合材料都表现出随载荷、速度和温度的巨大摩擦变化。特别是，碳化复合材料比固化复合材料具有更高、更稳定的摩擦性能，但其弱点是与耐磨性能相关的机械强度较低。