混杂纤维增强的汽车制动摩擦材料性能

研究了混杂纤维含量对混杂纤维增强汽车制动摩擦材料性能的影响；结果表明，随着坡缕石纤维和钢纤维含量的增加，摩擦材料的冲击强度均增加；坡缕石含量的变化对磨损率影响不大，Kevlar含量较高时，混杂纤维摩擦材料200℃磨损率增加，250℃和350℃磨损率降低；Kevlar纤维随着其含量的增加，混杂纤维摩擦材料高温摩擦性能（250-350℃）有所降低。     

玄武岩纤维对树脂基摩擦材料摩擦磨损性能的影响

为探究玄武岩纤维在树脂基摩擦材料中的应用,采用热模压工艺制备了玄武岩纤维质量分数为0～20%的树脂基复合材料,对其进行摩擦磨损性能试验,并检测硬度和抗剪强度,观察磨损表面微观形貌,探讨其磨损机制。结果表明:向树脂基摩擦材料中添加玄武岩纤维,具有显著提高材料的硬度、抗剪强度,降低磨损率,增大摩擦系数和热衰退温度的作用。玄武岩纤维增强的摩擦材料硬度越高,摩擦系数越大,剪切强度和硬度越高,磨损率越小;当玄武岩纤维含量为15%时,磨损率最低,达到0.23 cm~3/(N·m);当玄武岩纤维含量为20%时,摩擦系数最大,达到0.45。玄武岩纤维增强的树脂基摩擦材料,其磨损机理以磨粒磨损为主。     

混杂纤维对摩擦材料性能影响的研究

本文采用腰果壳油、三聚氰胺改性粉末酚醛树脂为基体,陶瓷纤维、钛酸钾晶须和kevlar纤维混杂制备制动摩擦材料,研究了不同混杂纤维含量对摩擦材料摩擦磨损性能影响。结果表明,增强纤维含量过低或者过高均会导致摩擦材料摩擦性能的降低。陶瓷纤维、钛酸钾晶须和kevlar三种增强纤维混杂使用能够提高并稳定制动摩擦材料的摩擦系数,对降低摩擦材料的磨损率有明显的作用。推荐在纤维混杂摩擦材料配方中采用25％的纤维含量和3％的Kevlar纤维含量。     

纤维增强摩擦复合材料

本文对摩擦材料中增强纤维的选用进行了综述。探控讨了钢纤维，玻璃纤维，碳纤维等在摩擦材料中应用的优缺点及对摩擦材料性能的影响以及怎样优化纤维增强摩擦材料，并指出高性能纤维增强摩擦材料必然会替代石棉基摩擦复合材料。     

纤维含量对新型摩擦材料的性能影响

通过改变增强体纤维含量(10wt%~30wt%)研究其对新型摩擦材料的摩擦磨损性能的影响。通过定速摩擦性能试验机测试不同纤维含量材料的摩擦磨损性能;采用扫描电子显微镜观察试样磨后的微观形貌,进而分析其摩擦过程。结果表明:随混杂纤维含量的增加,各温度阶段的摩擦系数逐渐减小,磨损率总体呈现先降低后增大的趋势,纤维含量为10%~15%摩擦材料具有较高且稳定的摩擦系数和低磨损率。     

玄武岩纤维用于国内摩擦材料的可行性研究

将试制的玄武岩短切纤维进行了配方试验和性能测试.分析玄武岩纤维在国内摩擦材料中的应用前景,介绍了玄武岩纤维在摩擦材料中的应用.通过对玄武岩短切纤维增强制动片的检测认为其适合作为摩擦材料的增强材料.     

增强纤维含量对汽车摩擦材料性能的影响

本文研究了不同体积百分数混杂纤维增强材料对汽车摩擦材料的摩擦、磨损性能及硬度、冲击强度和三点弯曲性能等指标的影响。结果表明，摩擦材料的冲击强度、三点弯曲断裂强度及硬度随纤维含量的增加而上升。纤维含量变化时，摩擦系数和磨损量变化较大，ＳＥＭ 及ＥＤＸ 分析表明，其机理与摩擦材料和对偶之间的转移膜的特性密切相关。在所研究的摩擦材料中，混杂纤维的含量以体积百分数１０％ 为最佳，此时材料有较高的摩擦系数和较低的磨损量，冲击强度、弯曲强度及硬度等性能指标都能达到使用要求。     

刹车片用酚醛树脂摩擦复合材料研究进展

综述了国内外刹车片用酚醛树脂摩擦复合材料的研究进展，重点介绍了酚醛树脂基体材料的耐热、增韧改性方法，包括化学改性和共混改性。对提高摩擦材料综合性能的各种增强纤维（如碳纤维、芳纶纤维、钛酸钾纤维）也作了简介，并概述了摩擦性能调节剂对材料摩擦性能的影响。最后指出混杂纤维已成为纤维增强体的一个发展趋势，安全、舒适、性能稳定、使用寿命长、环保无噪音将是刹车片用酚醛树脂基摩擦复合材料今后的发展方向。     

芳香族聚酰胺类纤维应用于摩擦材料的现状和趋势

综述和分析了近年来国内外芳香族聚酰胺类纤维在摩擦材料的应用研究现状和发展趋势.表明发达国家在强制禁止摩擦材料中使用致癌物质石棉后,大大促进了非石棉增强摩擦材料的发展.其中芳香族聚酰胺类纤维增强材料以其优越的热学、力学以及摩擦性能,在摩擦材料领域得到广泛的应用.尤其对位芳纶浆粕在此领域应用最广研究最为深入.     

芳纶/玻纤混杂纤维增强摩阻材料的研究

针对摩阻材料无石棉化的发展趋势,以丁腈橡胶改性酚醛为树脂基体,芳纶浆粕-玻纤混杂为增强体,研制出一种混杂纤维增强摩阻材料。经检测,该材料力学性能较高,摩擦性能稳定,摩擦因数在0.45￣0.60,同时具有较好的耐磨性。     

Research and application prospect of short carbon fiber reinforced ceramic composites

With the advantage of high temperature resistance, low expansion, low density and excellent thermal stability, carbon fiber reinforced ceramic composites have a very wide range of applications in aerospace, military, energy, chemical industries and transportation. Short carbon fiber reinforced ceramic composites are characterized by simple processes, low manufacturing costs, short preparation times and automated production, can be used in fields such as friction materials and thermal protection system. This paper reviews the current status and recent advances in research on homogenization techniques, mechanical properties, thermal properties and frictional properties of short carbon fiber reinforce ceramic composites. Different processing routes for short carbon fiber reinforced ceramic composites, including reactive melt infiltration (RMI), hot pressing (HP), spark plasma sintering (SPS) and pressureless sintering, the advantages and drawbacks of each method are briefly discussed. The future development direction of low-cost manufacturing short carbon fiber reinforced ceramic composites is prospected.     

陶瓷纤维增强摩擦材料的性能研究

采用热压成型工艺制备出陶瓷纤维增强改性酚醛树脂摩擦材料,分析了纤维长度对摩擦材料抗热衰退性能、耐磨性能和力学性能的影响,并借助扫描电子显微镜(SEM)观察了摩擦材料的断口形貌.结果表明,陶瓷纤维长度对摩擦材料的摩擦磨损性能和力学性能影响很大;在纤维用量不变的条件下,长陶瓷纤维代替短陶瓷纤维后,摩擦材料在各温度段下的摩擦系数增大,耐高温性和热衰退现象得到了明显改善,冲击强度和硬度得到显著提高,在长陶瓷纤维质量分数为10%时,摩擦材料的综合摩擦磨损性能最好;SEM分析表明,长陶瓷纤维与树脂基体之间的界面粘结强度比短陶瓷纤维高.     

A review on machining of carbon fiber reinforced ceramic matrix composites

Carbon fiber reinforced ceramic matrix ceramic/polymers composites have excellent physical-mechanical properties for their specific strength, high hardness, and strong fracture toughness relative to their matrix, and they also possess a good performance of wear resistance, heat resistance, dimensional stability, and ablation resistance. It is a choice for thermal protection and high temperature structural materials. However, this kind of composites owning characteristics of high hardness and abrasion is difficult to machine which impedes the large-scale industrial application of manufacturing. This paper mainly reviews the research on machining status of carbon fiber reinforced ceramic matrix composites including carbon fiber reinforced polymer matrix composites from the aspects of conventional machining and unconventional machining method. The machining trends, problems existing in various machining methods and corresponding solutions are generalized and analyzed.     

砜芳纶浆粕——非石棉摩阻复合材料中新型增强纤维

本文研究一种新型摩阻材料增强纤维－砜芳纶浆粕，它具有卓越耐高温性能，以砜芳纶浆粕增强摩阻复合材料制品具有稳定摩擦系数和较低磨耗，该纤维在无石棉摩阻材料行业呈良好开发前景。     

Tribological behavior of carbon fiber reinforced ZrB2 based ultra high temperature ceramics

The tribological behavior of ultra-high temperature ceramic matrix composites (UHTCMCs) was investigated to understand these materials in friction applications. Samples consisting of pitch-based randomly orientated chopped carbon fiber (CF) reinforced ZrB₂-10 vol% SiC were prepared (ZS). The tribological behavior was tested on a self-designed dynamometer, coupling the UHTCMC pads with either carbon fiber reinforced carbon−silicon carbide (C/C-SiC) or steel disks, with two applied contact pressures (1 and 3 MPa) and the surface microstructures were analyzed to unravel the wear mechanisms. Even at high mechanical stresses, tests against the C/C-SiC disk showed stable braking performance and wear. The abraded material from a steel disk formed a stable friction film by fusing together harder pad particles with abraded steel, which reduced wear and stabilized the braking performance. The high values of coefficient of friction obtained (0.5–0.7), their stability during the braking and the acceptable wear rate make these materials appealing for automotive brake applications.     

纤维增强陶瓷基复合材料概述

连续纤维增强陶瓷基复合材料是最有前途的高温结构材料之一,以其优异的高韧性、高强度得到世界各国的高度重视。综述了纤维增韧陶瓷基复合材料的选材原则、主要的增韧机理、制备方法以及目前主要的界面改性方法。得到以下结论：纤维的选择必须满足工作环境的要求,纤维与基体之间要在热力学上相匹配;主要的增韧机理为载荷转移、微裂纹增韧、裂纹偏转、纤维脱粘和纤维拔出;复合材料的主要制备方法是热压法、CVI法和聚合物浸渍裂解法;目前最有效的界面改性方法是纤维表面涂层。用氧化物纤维作为增韧体,研究更加简单适用于大规模生产的制备方法,研究更加简单的涂层工艺是今后研究纤维增强陶瓷基复合材料的重点。     

不同表面处理导丝轮对聚丙烯腈基碳纤维原丝性能的影响

对比分析了表面喷砂、全陶瓷、表面镀陶瓷3种表面处理工艺导丝轮在使用过程中的性能变化及其对聚丙烯腈(PAN)基碳纤维原丝的影响。结果表明:镀陶瓷的导丝轮表面光洁度高,摩擦因数小,镀层耐磨损,适合在高纺速碳纤维原丝的生产中使用。     

纤维增强Al2O3-SiO2气凝胶隔热复合材料研究进展

Al₂O₃-SiO₂气凝胶是一种低密度、高比表面积、高孔隙率、低热导率的三维结构纳米多孔材料,在航空航天、建筑保温、石油化工等领域具有广泛的应用前景,是理想的高温隔热基体之一。但纯Al₂O₃-SiO₂气凝胶力学性能和抑制高温辐射传热能力较弱,限制了自身在隔热领域的应用。采用纤维作为增强体,制备的Al₂O₃-SiO₂气凝胶复合材料同时具有较好的力学和隔热性能,是目前国内外高温隔热材料方向的研究热点之一。本文介绍了纤维增强Al₂O₃-SiO₂气凝胶隔热复合材料的制备方法,综述了目前国内外该材料的研究进展,并对其未来发展趋势做了展望。     

Evaluation of fade‐recovery performance of hybrid friction composites based on ternary combination of ceramic‐fibers,ceramic‐whiskers,and aramid‐fibers

Hybrid composite friction material based on ternary combination of potassium titanate whiskers, alumino‐silicate ceramic fibers, and aramid fibers were fabricated and evaluated for their physical, mechanical, and tribo‐performance. The frictional response, friction‐fade, friction‐recovery, and wear properties have been characterized on a Krauss friction tester following ECE R‐90 regulation. Optimally, the composite with hybrid reinforcement incorporations in the form of ceramic‐whiskers, ceramic‐fiber, and aramid‐fiber in the ratio of 13.75 : 13.75 : 2.5 has potentially been explored as a functionally feasible friction‐material for braking applications. The interdependence of fade, recovery, disc temperature rise, and wear characteristics is established via thematic correlation diagram. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012