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Thermal-mechanical properties of short carbon fiber reinforced geopolymer matrix composites subjected to thermal load 被引量:4
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作者 林铁松 贾德昌 +1 位作者 何培刚 王美荣 《Journal of Central South University》 SCIE EI CAS 2009年第6期881-886,共6页
Short carbon fiber preform reinforced geopolymer composites containing different contents of α-Al2O3 filler (Cr(a-Al2O3)/geopolymer composites) were fabricated, and the effects of heat treatment temperatures up t... Short carbon fiber preform reinforced geopolymer composites containing different contents of α-Al2O3 filler (Cr(a-Al2O3)/geopolymer composites) were fabricated, and the effects of heat treatment temperatures up to 1 200 ℃ on the thermal-mechanical properties were studied. The results show that the thermal shrinkage in the direction perpendicular to the lamination of the composites gradually increases with the increase of the heat treatment temperatures from room temperature (25 ℃ ) to 1000 ℃. However, the composites in the direction parallel to the lamination show an expansion behavior. Beyond 1 000℃, in the two directions the composites exhibit a larger degree of shrinkage due to the densification and crystallization. The mechanical properties of the composites show the minimum values in the temperature range from 600 to 800 ℃ as the hydration water of geopolymer matrix is lost. The addition of α-Al2O3 particle filler into the composites clearly increases the onset crystalline temperature of leucite (KAlSi2O6) from the amorphous geopolymer matrix. In addition, the addition of α-Al2O3 particles into the composites can not only help to keep volume stable at high temperatures but also effectively improve the mechanical properties of the composites subjected to thermal load to a certain extent. The main toughening mechanisms of the composites subjected to thermal load are attributed to fiber pulling-out. 展开更多
关键词 short carbon fiber Α-AL2O3 thermal-mechanical properties GEOPOLYMER thermal load
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Fabrication of Short Carbon Fiber Reinforced AZ91D Alloy by Infiltration-Extrusion Integrated Technique 被引量:1
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作者 Ouyang Haibo Li Hejun Qi Lehua Li Zhengjia Su Lizheng Wei Jianfeng 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2009年第A03期100-104,共5页
Short carbon fiber reinforced AZ91D alloy (Csf/AZ91D) was fabricated by the infiltration-extrusion method. The short carbon fiber preform was infiltrated with melted AZ91D alloy under the assistant of gas pressure. Th... Short carbon fiber reinforced AZ91D alloy (Csf/AZ91D) was fabricated by the infiltration-extrusion method. The short carbon fiber preform was infiltrated with melted AZ91D alloy under the assistant of gas pressure. The extrusion processing was applied following the infiltration processing directly. The tensile property and microstructure of the Csf/AZ91D and that of the die-casting and extruded AZ91D alloy was compared. The results show that the short carbon fiber reinforced AZ91D alloy present excellent tensile property. The tensile strength and modulus of elasticity of Csf/AZ91D is about 50% and 18% higher than that of cast AZ91D alloy, respectively. The elongation to fracture of Csf/AZ91D is about 50% lower than that of AZ91D alloy. 展开更多
关键词 碳纤维增强镁合金 制备方法 物理性能 微观结构
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Study on Microwave Dielectric Property of Carbon Black and Short Carbon Fibers
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作者 WUHong-huan ZHU Dong-mei LUO Fa ZHOU Wan-cheng WANG Xiao-yan 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2006年第B12期130-133,共4页
Carbon black and carbon fibers of different lengths were introduced in different matrices at different ratios to explore their microwave dielectric properties under 8.2 GHz-12.4 GHz. It is found that the actual dielec... Carbon black and carbon fibers of different lengths were introduced in different matrices at different ratios to explore their microwave dielectric properties under 8.2 GHz-12.4 GHz. It is found that the actual dielectric constants of the samples containing carbon black are in a two-order function of the contents of carbon black (ε', ε"=Av2+Bv+C) and the complex dielectric constants show an obvious frequency response. Of the added fibers of different lengths, the 4 mm-long one could well disperse in the matrices having not only good frequency response, but also larger real parts, imaginary parts and loss values. The imaginary parts and the loss values (tanδ)of the samples with 4 mm-long carbon fibers added increase linearly with the contents of fiber increasing. So it is practicable to adjust the dielectric parameters of the material in a wide range by changing the added amount of carbon black, and the carbon fiber or altering the lengths of the carbon fiber added. 展开更多
关键词 microwave dielectric property short carbon fibers carbon black
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Monte Carlo Computer Simulation of Nonuniform Field Emission Current Density for a Carbon Fiber
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作者 P. A. Golovinski A. A. Drobyshev 《Journal of Electromagnetic Analysis and Applications》 2014年第1期8-14,共7页
The field emission current from a carbon fiber is considered. As a model of emission of an elementary carbon tube, tunnel ionization of an electron from a short-range potential is taken. The exact solution for the wav... The field emission current from a carbon fiber is considered. As a model of emission of an elementary carbon tube, tunnel ionization of an electron from a short-range potential is taken. The exact solution for the wave function in such a model allows obtaining an asymptotic expression for electron current. A computer model of transverse distribution of emission current of a carbon fiber is built on the basis of the Monte Carlo method that allows taking into account the random character of distribution of local emitter sources and the distribution of gains of an electric field in carbon nanotubes. 展开更多
关键词 Field Emission carbon fiber Current Density short-RANGE Potential MONTE Carlo Method
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短切碳纤维增强MC尼龙复合材料的制备与性能 被引量:1
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作者 林嘉恩 张鹏 +4 位作者 杨玉婧 麦振宇 张功武 程永奇 章争荣 《材料科学与工程学报》 CAS CSCD 北大核心 2024年第1期84-90,143,共8页
MC尼龙是一种已得到广泛应用的重要的工程塑料,但存在尺寸稳定性较差、热稳定性不高和重载下强度欠佳等缺点。本研究采用短切碳纤维(SCF)作为改性剂,探索研究了SCF/MC尼龙复合材料的制备工艺,研究了不同的SCF含量对复合材料密度、转化... MC尼龙是一种已得到广泛应用的重要的工程塑料,但存在尺寸稳定性较差、热稳定性不高和重载下强度欠佳等缺点。本研究采用短切碳纤维(SCF)作为改性剂,探索研究了SCF/MC尼龙复合材料的制备工艺,研究了不同的SCF含量对复合材料密度、转化率、机械性能、摩擦性能及结晶度的影响。结果表明:在0~20%SCF含量范围内,复合材料的密度及拉伸强度表现为先增大后减少;转化率和冲击强度为20%SCF复合材料最为突出;而摩擦系数、磨损量在加入SCF后呈现先减少后增加的趋势。在10%SCF含量时,材料表现出较好的摩擦性能,同时结晶温度增大到182.95℃,结晶度为35.57%。研究结果证实通过添加适当比例的SCF改性剂可以有效改善MC尼龙的性能,这为进一步开发满足某些特殊螺旋传动下的新型复合材料做了有益尝试。 展开更多
关键词 MC尼龙 短切碳纤维 复合材料 性能
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基于响应曲面设计的短碳纤维增强塑料注塑成型工艺优化
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作者 姜旭 毕凤阳 +2 位作者 刘长喜 王晓宏 姚永涛 《合成树脂及塑料》 CAS 北大核心 2024年第6期38-42,共5页
以薄板结构为研究对象,基于Moldflow软件对短碳纤维增强塑料的注塑成型过程进行分析。以模具温度、熔体温度及保压压力为因素,最大翘曲变形量和最大体积收缩率为目标响应,利用BBD响应曲面设计对注塑工艺进行优化。结果表明:保压压力是... 以薄板结构为研究对象,基于Moldflow软件对短碳纤维增强塑料的注塑成型过程进行分析。以模具温度、熔体温度及保压压力为因素,最大翘曲变形量和最大体积收缩率为目标响应,利用BBD响应曲面设计对注塑工艺进行优化。结果表明:保压压力是对目标响应影响最显著的工艺参数;随着模具温度、熔体温度及保压压力的降低,最大翘曲变形量呈增大趋势;随着熔体温度升高和保压压力降低,保压结束后的最大体积收缩率呈增大趋势;最佳工艺组合为模具温度100℃,熔体温度280℃,保压压力100 MPa。 展开更多
关键词 响应曲面 短碳纤维 注塑成型 工艺参数 MOLDFLOW软件 模拟
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Improved multi-orientation dispersion of short carbon fibers in aluminum matrix composites prepared with square crucible by mechanical stirring 被引量:5
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作者 Guanglong Li Yingdong Qu +3 位作者 Yaohua Yang Qiwen Zhou Xishi Liu Rongde Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第5期81-87,共7页
In order to improve the strength of short carbon fibers reinforced aluminum matrix(Csf/Al)composite,the dispersion of short carbon fibers with multi-orientation was controlled with a square crucible by mechanical stir... In order to improve the strength of short carbon fibers reinforced aluminum matrix(Csf/Al)composite,the dispersion of short carbon fibers with multi-orientation was controlled with a square crucible by mechanical stirring.The three-dimensional flow field models of liquid aluminum melt in the square/round crucibles were established and calculated,and the results were compared.The calculated results show that turbulent flow could be induced both in the square and round crucible,while the non-axisymmetric structure of the square crucible results in higher turbulent kinetic energy in the melt.Therefore,the uniformity and multi-orientation dispersion of the short fibers can be improved by the intensive turbulent flow in the square crucible,which will be increased by increasing the rotational velocity.The distribution of the short carbon fibers in the aluminum matrix prepared under different rotation velocities in square crucible was experimentally investigated.With the increase of stirring velocity,the multi-orientation dispersion of the short fibers in the composites increased gradually.The experimental results are consistent with the calculation results.The tensile testing results show that the strength of the Csf/Al composite can reach 172 MPa when the rotational velocity is 1000 rpm,and it is 48.3%higher than that prepared by the round crucible under the same conditions,which results from the improved multi-orientation dispersion of short carbon fibers in aluminum matrix. 展开更多
关键词 SQUARE CRUCIBLE short carbon fibers Aluminum matrix composite Mechanical STIRRING Multi-orientation DISPERSION
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Strength and Wear Behavior of Mg Alloy AE42 Reinforced with Carbon Short Fibers 被引量:4
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作者 Sabbah Ataya Naser A.Alsaleh Mohamed M.El-Sayed Seleman 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2019年第1期31-40,共10页
In addition to the advantage of the lightweight of magnesium alloys, magnesium composites have moderate strength and elastic modulus. The proposed application of magnesium composites as diesel truck pistons makes it n... In addition to the advantage of the lightweight of magnesium alloys, magnesium composites have moderate strength and elastic modulus. The proposed application of magnesium composites as diesel truck pistons makes it necessary to assess their wear performance. Little research data have been discussed on wear behavior of Mg alloy AE42 matrix and its composites. Thus, this paper reports wear behavior of magnesium alloy AE42(Mg–Al–Mn—RE; rare earth) and its composite AE42-C, which contains 23 vol% of randomly oriented carbon short fibers. Materials characterization, including density measurements, hardness testing, microstructures investigation, and compression testing at temperatures of 25, 150,and 300 °C, were conducted. Wear tests were performed under various loads and sliding distances. Wear mechanisms were also proposed based on the examination of worn surfaces using optical microscopy and scanning electron microscopy equipped with EDX(energy-dispersive X-ray spectrometry) analysis system. The hardness of AE42-23 vol% C composite is twice the hardness of the Mg matrix alloy AE42. Significant improvements to yield stress and compressive strength at temperatures of 25, 150, and 300 °C of the composite versus the AE42 alloy are achieved. Wear resistance of the composite is improved considerably versus that of the Mg alloy AE42 at the various sliding distances. Smearing of graphite on the worn surface produces a lubricating film that delays change from mild to severe wear of the composite, especially at high loads. EDX analysis of the worn surface shows oxidation of the matrix alloy at higher wear loads, and this mechanism decreases in the presence of carbon fibers under the same loads. Abrasive wear, oxidation, and plastic deformation are the dominant wear mechanisms for the alloy matrix AE42, whereas mainly abrasive wear is the wear mechanism of AE42-23 vol% C composite under the proposed testing conditions. 展开更多
关键词 Magnesium composites carbon short fibers COMPRESSIVE STRENGTH WEAR resistance WEAR mechanisms
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Tribological properties of short carbon fibers reinforced epoxy composites 被引量:5
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作者 Nay Win KHUN He ZHANG +3 位作者 Lee Hoon LIM Chee Yoon YUE Xiao HU Jinglei YANG 《Friction》 SCIE EI CAS 2014年第3期226-239,共14页
Short carbon fiber(SCF)reinforced epoxy composites with different SCF contents were developed to investigate their tribological properties.The friction coefficient and wear of the epoxy composites slid in a circular p... Short carbon fiber(SCF)reinforced epoxy composites with different SCF contents were developed to investigate their tribological properties.The friction coefficient and wear of the epoxy composites slid in a circular path against a steel pin inclined at 45°to a vertical axis and a steel ball significantly decreased with increased SCF content due to the solid lubricating effect of SCFs along with the improved mechanical strength of the composites.The scanning electron microscope(SEM)observation showed that the epoxy composites had less sensitive to surface fatigue caused by the repeated sliding of the counterparts than the epoxy.The tribological results clearly showed that the incorporation of SCFs was an effective way to improve the tribological properties of the epoxy composites. 展开更多
关键词 epoxy composite short carbon fiber FRICTION WEAR
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碳纤维表面处理对铜基摩擦材料性能的影响
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作者 刘建秀 贾旭钢 +3 位作者 樊江磊 程晓阳 梁柳博 张宇 《热加工工艺》 北大核心 2024年第16期143-147,共5页
采用粉末冶金技术制备了添加短切碳纤维的铜基摩擦材料,研究了碳纤维粗化、碳纤维镀铜对铜基摩擦材料组织、力学性能及摩擦磨损性能的影响。结果表明:由于碳纤维与铜基体界面性能较差,添加无处理碳纤维后,摩擦材料的硬度及密度最低,摩... 采用粉末冶金技术制备了添加短切碳纤维的铜基摩擦材料,研究了碳纤维粗化、碳纤维镀铜对铜基摩擦材料组织、力学性能及摩擦磨损性能的影响。结果表明:由于碳纤维与铜基体界面性能较差,添加无处理碳纤维后,摩擦材料的硬度及密度最低,摩擦系数和磨损率在不同制动初速度下最大。添加粗化处理碳纤维的摩擦材料,其摩擦系数低于未添加碳纤维的,硬度及密度有所降低。由于碳纤维镀铜改善了碳纤维与基体之间的润湿性与结合状态,硬度以及密度有轻微下降。碳纤维发挥了其固体润滑剂的作用,摩擦系数稳定,碳纤维镀铜处理试样的磨损量最低。 展开更多
关键词 铜基摩擦材料 短切碳纤维 粗化 镀铜
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短切碳纤维对泵用SiC复合陶瓷强度与耐冲蚀性影响研究
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作者 梁晨阳 危涛 +7 位作者 文钰斌 吴志宏 李家虎 熊华 惠越 李丽 印雄雄 徐衡 《粘接》 CAS 2024年第5期72-74,共3页
将0.5 mm、1 mm和3 mm的短切碳纤维分别加入SiC树脂复合陶瓷中,研究不同短切碳纤维长度对SiC复合陶瓷抗折强度和耐冲蚀性能的影响。研究结果表明,添加短切碳纤维后,试样的体积密度从2.45降低至2.32 g/cm^(3),而显气孔率变化不大,维持在4... 将0.5 mm、1 mm和3 mm的短切碳纤维分别加入SiC树脂复合陶瓷中,研究不同短切碳纤维长度对SiC复合陶瓷抗折强度和耐冲蚀性能的影响。研究结果表明,添加短切碳纤维后,试样的体积密度从2.45降低至2.32 g/cm^(3),而显气孔率变化不大,维持在4%。随着添加短切碳纤维长度的增加,试样的抗折强度显著提升,从61.57 MPa增加至71.67 MPa。添加3 mm的短切碳纤维后,试样的抗折强度更加稳定,多个试样间的差距显著降低。添加不同长度短切碳纤维后,试样的常温耐冲蚀性无明显变化,一次和二次冲蚀损失体积分别维持在0.033 cm^(3)和0.045 cm^(3)左右。SiC树脂复合陶瓷浇注料的制备过程中,添加3 mm的短切碳纤维可以有效提升抗折强度,同时保持复合陶瓷优秀的耐冲蚀性能。 展开更多
关键词 SiC树脂复合材料 短切碳纤维 抗折强度 耐冲蚀性能
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Study on the crystal morphology and melting behavior of isothermally crystallized composites of short carbon fiber and poly(trimethylene terephthalate)
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作者 Mingtao RUN Hongzan SONG Yanping HAO 《Frontiers of Chemical Science and Engineering》 SCIE EI CSCD 2009年第3期255-264,共10页
The spherulites of the short carbon fiber(SCF)/poly(trimethyleneterephthalate)(PTT)compositesformedin limited space at designed temperatures,and their melting behaviors were studied by the polarized optical microscopy... The spherulites of the short carbon fiber(SCF)/poly(trimethyleneterephthalate)(PTT)compositesformedin limited space at designed temperatures,and their melting behaviors were studied by the polarized optical microscopy,atomic force microscopy(AFM),and scanning electron microscopy(SEM),respectively.The results suggest that SCF content,isothermal crystallization temperatures,and the film thicknesses influence the crystal morphology of the composites.The dimension of the spherulites is decreased with increasing SCF content,but whether banded or nonbanded spherulites will form in the composites is not dependent on SCF content.However,the crystal morphology of the composites depends strongly on the temperature.When the isothermal crystallization temperatures increase from 180℃ to 230℃,the crystal morphology of SCF/PTT composites continuously changes in the following order:nonbanded→banded→nonbanded spherulites.Disconti-nuous circle lines form in the film when the film thickness increases from 30 to 60μm.Basing on the SEM observation,it is found that these circle lines are cracks formed due to the constriction difference of the different parts of the spherulites.These cracks are formed when the film is cooled from the isothermal crystallization temperature to the room tempera-ture at a slow cooling rate;while they will disappear gradually at different temperatures in the heating process.The crack will appear/disappear first around the center of the spherulite when the film was cooled/heated.The nontwisted or slightly twisted lamellas will reorganize to form highly twisted lamellas inducing apparent banded texture of the spherulites. 展开更多
关键词 poly(trimethylene terephthalate) short carbon fiber banded spherulites CRACK
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聚苯胺包覆短碳纤维的制备及电磁性能研究 被引量:14
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作者 喻冬秀 陈明涛 +3 位作者 皮丕辉 文秀芳 程江 杨卓如 《高校化学工程学报》 EI CAS CSCD 北大核心 2009年第1期148-153,共6页
对短碳纤维(SCF)硝酸氧化处理后,采用聚苯胺原位氧化聚合法对其进行包覆改性,制备聚苯胺包覆改性SCF,以改善SCF的电磁性能。采用XPS、SEM对聚苯胺包覆的SCF进行了微观结构和形貌的分析,结果显示聚苯胺层包覆完整、致密,且聚苯胺和SCF表... 对短碳纤维(SCF)硝酸氧化处理后,采用聚苯胺原位氧化聚合法对其进行包覆改性,制备聚苯胺包覆改性SCF,以改善SCF的电磁性能。采用XPS、SEM对聚苯胺包覆的SCF进行了微观结构和形貌的分析,结果显示聚苯胺层包覆完整、致密,且聚苯胺和SCF表面之间存在化学键合作用。采用PNA-LN5230A微波网络测试仪测定了聚苯胺包覆SCF的电磁性能(复介电常数和复磁导率),并对2mm厚度下的吸收和反射损耗进行了分析,研究了以此为填料制备的涂膜的电磁屏蔽性能和导电性。结果表明,在50MHz~2GHz频率范围内,相对于未包聚改性的短碳纤维,导电聚苯胺/碳纤维(PASCF)的复介电常数实部和虚部都有所提高,磁损耗正切为0,为电损耗型材料,而不导电聚苯胺/碳纤维(NPASCF)的复介电常数实部和虚部都有所下降,而磁损耗正切高达0.09,显示出弱电磁性;采用Matlab6.5软件进行屏蔽性能分析,导电聚苯胺包覆碳纤维的吸收损耗可达4.654dB,不导电聚苯胺包覆碳纤维(NPASCF)的吸收损耗为1.105dB;以PASCF为填料制备的涂膜表面电阻率为1.02Ω·m-2,电磁屏蔽效能值约为17dB,以NPASCF为填料制备的涂膜表面电阻率为2.32×1011Ω·m-2,电磁屏蔽效能值可达8dB。 展开更多
关键词 复介电常数 复磁导率 聚苯胺 短碳纤维 包覆
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短碳纤维增强铜基复合材料的摩擦磨损性能研究 被引量:15
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作者 唐谊平 刘磊 +2 位作者 赵海军 朱建华 胡文彬 《材料工程》 EI CAS CSCD 北大核心 2007年第4期53-56,60,共5页
采用冷压烧结工艺制备了短碳纤维增强铜基复合材料,考察了该复合材料的干摩擦磨损性能。讨论了短碳纤维含量、载荷、转速等对复合材料摩擦性能的影响。结果表明:复合材料的耐磨性能明显优于基体材料;随着碳纤维含量的增加复合材料的耐... 采用冷压烧结工艺制备了短碳纤维增强铜基复合材料,考察了该复合材料的干摩擦磨损性能。讨论了短碳纤维含量、载荷、转速等对复合材料摩擦性能的影响。结果表明:复合材料的耐磨性能明显优于基体材料;随着碳纤维含量的增加复合材料的耐磨性能进一步提高;随载荷和转速的提高,摩擦系数和磨损量也随之增加;复合材料由纯铜的粘着磨损转变为剥层磨损,并均伴有一定的氧化磨损。 展开更多
关键词 短碳纤维 铜基复合材料 摩擦磨损
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碳纤维混凝土的力学性能试验研究 被引量:17
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作者 任彦华 程赫明 +1 位作者 何天淳 代若愚 《云南农业大学学报(自然科学版)》 CAS CSCD 北大核心 2010年第5期697-702,共6页
通过试验,对短切碳纤维掺量为1%,2%的混凝土的150 mm×150 mm×150 mm立方体和150 mm×150mm×300 mm棱柱体试块的抗压强度、劈拉强度、静力受压弹性模量、泊松比等进行了试验,并和未掺短切碳纤维的普通混凝土的基体做... 通过试验,对短切碳纤维掺量为1%,2%的混凝土的150 mm×150 mm×150 mm立方体和150 mm×150mm×300 mm棱柱体试块的抗压强度、劈拉强度、静力受压弹性模量、泊松比等进行了试验,并和未掺短切碳纤维的普通混凝土的基体做了比较和分析,据此研究分析了一定基体混凝土强度下不同碳纤维体积分数对混凝土力学性能等变化的影响。 展开更多
关键词 短切碳纤维 掺量 混凝土 力学性能
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聚苯胺包覆短碳纤维的机理及分散稳定性 被引量:8
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作者 喻冬秀 陈明涛 +2 位作者 文秀芳 程江 杨卓如 《华南理工大学学报(自然科学版)》 EI CAS CSCD 北大核心 2007年第7期72-77,共6页
采用硝酸氧化法和聚苯胺原位聚合包覆法对短碳纤维(SCF)进行表面处理,以期改善SCF在涂料中的分散稳定性和物理机械性能.利用XPS、SEM、紫外可见分光光度计、四探针法和同轴法兰装置等,考察了氧化SCF表面的活性官能团和聚苯胺在氧化SCF... 采用硝酸氧化法和聚苯胺原位聚合包覆法对短碳纤维(SCF)进行表面处理,以期改善SCF在涂料中的分散稳定性和物理机械性能.利用XPS、SEM、紫外可见分光光度计、四探针法和同轴法兰装置等,考察了氧化SCF表面的活性官能团和聚苯胺在氧化SCF表面的包覆机理,以及包覆改性后SCF的微观结构、分散性能.结果表明:硝酸氧化法提高了SCF表面的含氧基团,聚苯胺是以化学健的方式包覆在SCF的表面;氧化处理结合聚苯胺包覆处理提高了SCF在涂料中的分散稳定性;相对于未经表面处理的SCF体系,涂层的表面方块电阻从17.1Ω降为5.3Ω. 展开更多
关键词 短碳纤维 聚苯胺 包覆 机理 分散稳定性
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短碳纤维增强PPEK复合材料的性能研究 被引量:7
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作者 廖功雄 何伟 +2 位作者 董黎明 靳奇峰 蹇锡高 《宇航材料工艺》 CAS CSCD 北大核心 2005年第2期22-24,28,共4页
采用熔融共混的方式制备了不同短碳纤维含量增强含二氮杂萘酮聚芳醚酮(PPEK)基复合材料,对复合材料的加工性能、力学性能、摩擦性能、耐热性进行了研究。结果表明:短碳纤维增强复合材料均可以注塑成型;短碳纤维对PPEK的增强作用明显,拉... 采用熔融共混的方式制备了不同短碳纤维含量增强含二氮杂萘酮聚芳醚酮(PPEK)基复合材料,对复合材料的加工性能、力学性能、摩擦性能、耐热性进行了研究。结果表明:短碳纤维增强复合材料均可以注塑成型;短碳纤维对PPEK的增强作用明显,拉伸强度和弯曲强度均有大幅提高;复合材料中短碳纤维起到了明显的自润滑作用,复合材料的摩擦系数和磨损率均随碳纤维含量的增加而明显降低;短碳纤维的加入进一步提高了复合材料的耐热性。 展开更多
关键词 PPEK 性能研究 碳纤维增强复合材料 短碳纤维 纤维含量 二氮杂萘酮 聚芳醚酮 熔融共混 加工性能 力学性能 摩擦性能 注塑成型 增强作用 弯曲强度 拉伸强度 润滑作用 耐热性 磨损率 系数和
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碳纤维在混凝土中的应用 被引量:17
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作者 陈丽红 孟宏睿 惠雅莉 《混凝土》 CAS CSCD 北大核心 2006年第4期29-31,共3页
本文介绍了碳纤维的制备、碳纤维的结构和性能、碳纤维的分类与等级,重点讨论了碳纤维在混凝土中的增强阻裂作用、导电性、温度敏感性和压电效应,以及碳纤维增强混凝土(CFRC)作为智能材料的发展趋势。
关键词 碳纤维 增强 性能 混凝土
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短切炭纤维增强沥青基C/C复合材料的力学性能 被引量:21
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作者 郭领军 李贺军 +2 位作者 薛晖 李克智 付业伟 《新型炭材料》 SCIE EI CAS CSCD 北大核心 2006年第1期36-42,共7页
利用模压半炭化成型工艺在大气环境下制备出了短切炭纤维增强沥青基C/C复合材料(简称SCFRC)。研究了短切炭纤维的体积分数对SCFRC材料的体积密度和力学性能的影响规律。借助光学显微镜和扫描电镜对其微观组织和断口形貌进行了观察,分析... 利用模压半炭化成型工艺在大气环境下制备出了短切炭纤维增强沥青基C/C复合材料(简称SCFRC)。研究了短切炭纤维的体积分数对SCFRC材料的体积密度和力学性能的影响规律。借助光学显微镜和扫描电镜对其微观组织和断口形貌进行了观察,分析了短切炭纤维对SCFRC材料的增强机制。结果表明,当短切炭纤维的体积分数由0%增大到11.8%时,SCFRC材料的力学性能随之呈线性增加;短切炭纤维增强SCFRC材料的机制主要有裂纹偏转效应、桥联效应以及脱粘和拔出效应。 展开更多
关键词 沥青基C/C复合材料 短切炭纤维 模压半炭化成型工艺 力学性能 增强机制
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短碳纤维电磁特性及其在吸波材料中应用研究 被引量:43
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作者 邢丽英 刘俊能 任淑芳 《材料工程》 EI CAS CSCD 北大核心 1998年第1期19-21,共3页
研究了掺混短碳纤维后材料在电磁波作用下某些宏观物理量(电磁参数、电磁波吸收与透过等)的响应特性。结果表明:调整纤维长度及含量可在很宽范围内调整材料的电磁参数与衰减量,将为研制与设计高性能吸波材料及电磁屏蔽等功能材料提... 研究了掺混短碳纤维后材料在电磁波作用下某些宏观物理量(电磁参数、电磁波吸收与透过等)的响应特性。结果表明:调整纤维长度及含量可在很宽范围内调整材料的电磁参数与衰减量,将为研制与设计高性能吸波材料及电磁屏蔽等功能材料提供依据。 展开更多
关键词 短碳纤维 电磁特性 吸波材料 碳纤维 飞机 隐身
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