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富镧混合稀土对莫来石短纤维增强ZL109复合材料高温强度的影响 赵平1,沈保罗1,涂铭旌1,高升吉1 (1.四川联合大学金属材料系,四川,成都,610065) 摘要:本文作者在基体合金中加入适量富镧混合稀土和适当提高锰量及铁量,使该复合材料在300℃时的瞬时强度提高到165MPa,350℃时的瞬时强度提高到114MPa,400℃时的瞬时强度提高到77MPa.作者通过对莫来石短纤维增强ZL109复合材料的高温强度特性及高温下的断裂机理的分析,认为适量加入富镧混合稀土,可以改善基体合金液同纤维之间的润湿状况,生成以纤维为基底长大的金属间化合物,从而改善纤维和基体之间的结合状况. 关键词:莫......
纤维体积分数对莫来石短纤维增强ZL107合金复合材料高温蠕变的影响 李达1,于维成2,沈保罗1,涂铭旌1,姚戈2,高升吉1,王珊玲1 (1.四川大学,成都,610065;2.中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳110015) 摘要:研究了莫莱石短纤维增强ZL107复合材料中纤维体积分数的变化对其在300℃时的高温蠕变性能的影响.实验结果发现,随着纤维加入量从0到8%,20%的增加,复合材料的高温抗蠕变性能随之提高.在本实验中,增强相的间接强化作用比直接强化作用更大. 关键词:莫莱石短纤维; 体积分数; 铝基复合材料; 蠕变; [全文内容正在添加中] ......
formula agrees with that obtained by experiments. Key words: steel fibre; TRC plates; RC beams; carbon fabric; flexural capacity; plane section assumption 纤维增强混凝土(TRC )[1-3]是一种采用纤维网格或织物来增强细骨料混凝土的高性能复合材......
聚酰亚胺纤维市场发展前景广阔江镇海摘 要:<正>聚酰亚胺(PI)纤维,英文名polyimide fibre,又称为聚酰亚胺纤维,是由均苯四酸二酐和芳香族二胺聚合得到聚酰胺酸预聚体,再通过熔液纺丝而制得的高性能纤维.聚酰亚胺纤维具有良好的机械力学性能,强度高,耐高辐射性极强,不仅而高温,而且关键词:......
,the friction temperature andthe form of a new kind of friction materialwhich is a glass fibre resin friction materials(GFRF)are studied through a series of testson machine as EPMA,STM,DTG-DTA,anoptical... down or even eliminated.thedistribution of heat-stress is improved and thelife span is extended.Raising the temperatureof resin resolution and enhancing the sticknessbetween resin and glass fibre......
shielding effectiveness (SE) of SiC fibre bundles were measured in 8.2-12.4 GHz by waveguide method. The reflection coefficient (RC) of unidirectional SiC fibre laminates was determined in 8-18 GHz using......
, the solidified Mg grains have an elongated shape with a<0001> basal fibre texture nearly parallel to sample normal direction, while equiaxed grains were observed in the top melted layer having a much weaker basal fibre texture. Solidification twinning and deformation twinning were found in the vicinity of the melt/substrate interface where the Mg grains grow larger due to the heating. In addition......
%, respectively. The graphene/epoxy resin mixtures were used to impregnate unidirectional carbon fibre tapes. These prepregs were stacked(seven plies) and cured to produce laminates.The interlaminar...) highlighting the potential of graphene as a secondary filler in carbon fibre reinforced polymer composites.关键词:......
% fibre volume fraction through redensifying to density of 1.80 g·cm-3 by resin impregnation after redensifying to density of 1.50 g·cm-3 by chemical vapour deposit method. The friction and wear... and stability of C/C composites increase with increasing the fibre volume fraction; when the fibre volume fraction exceeds 30%, the increase of wear loss is very distinct; fibre volume fraction does not have......
, then to fibre-like. In the magnetic field with MFD equaling to 10T, the nano-particles have the shape of fibre with high ratio between length and diameter; and the composition of the fibre is mainly ferrite compound, not single oxide, which was judged from analysis results by energy spectrum. The diameter of the fibre decreases when the reaction temperature is increased or the adding time of reagent......
