共查询到19条相似文献,搜索用时 46 毫秒
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团状模塑料是一类粒子分散和纤维增强相结合的多相复合体系。研究其结构与破坏强度的关系,合理选用材料,有利于提高产品的可靠性和使用寿命。 相似文献
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本文叙述了我国电气用玻璃纤维增强不饱和聚酯模塑料(SMC/BMC)标准现状及存在的问题,并着重介绍了GB/T 23641—2009"电气用纤维增强不饱和聚酯模塑料(SMC/BMC)"国家标准与JB/T 7770—1995"电气用纤维增强不饱和聚酯模塑料(SMC/BMC)"机械行业标准的主要差异,对今后标准化工作提出了一些建议。 相似文献
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高强度酚醛模塑料的研制 总被引:2,自引:0,他引:2
通过对纤维填料种类数量及弹性体比例的选择,研制出高强度增韧酚醛模塑料,该塑料冲击强度超过12kJ/m2,弯曲强度95MPa。由该塑料模塑而成的轴承件,除能满足机械强度要求外,还具有自润滑性,可以进行车削加工,成功替代日本进口材料。 相似文献
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本文介绍了应用于热固性酚醛模塑料的连续化生产新工艺中的往复式螺杆混炼挤出机,对热固性酚醛树脂生产设备的现状和发展进行了论述。 相似文献
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晶须是高技术新材料中的一种重要原材料,作为触点材料的增强物将有不可多得的综合优势。本文介绍了晶须的形貌与性能及晶须增强银基触点材料的设计原理,同时还介绍了Ag/SiC(w)触点材料的制行工艺,可以预见晶须增强银及铜基触点材料将在电器开关中得到越来越广泛的应用。 相似文献
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AbstractThree-dimensional carbon fiber (3D-CF) reinforced resin matrix composites are successfully prepared by vacuum impregnation and hot pressing process. The microstructure analysis shows that the resin distribution in the composites is uniform, the infiltration effect is satisfactory, and there are no obvious defects such as pores and delamination. The compression properties of the composites are tested in the directions which are perpendicular to the thickness of the fiber layer and parallel to the thickness of the fiber layer, respectively. The compressive strength of the composites are 374?MPa and 262?MPa, and the difference is obvious. The former is 42.7% higher than the latter. Further analysis of the compression failure behavior of the two composites shows that there is a significant difference in the failure forms. The former is mainly fiber layer crushing deformation, while the latter is mainly fiber layer fold and fracture failure. The latter is more destructive than the former, so its compression strength is lower than that of the former. It can be seen that the structure distribution and loading direction of fiber fabric have an important influence on the compressive strength of 3D-CF reinforced resin matrix composites. 相似文献
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分析了后固化处理对以木粉、玻纤为填料增强的酚醛模塑料制件绝缘性能的影响,经后固化处理24h后,发现木粉增强的酚醛模塑料制件的表面绝缘电阻从2.5×109Ω增加到4.8×1012Ω,玻纤增强的酚醛模塑料制件的表面绝缘电阻从1.0×1012增加到5.7×1013Ω。探讨了后固化引起的树脂固化性能及填料性能的改变,结果发现,经后固化处理后,树脂的交联密度及交联规整度得到进一步提高,同时增强了木粉填料的憎水性能,提高了材料的绝缘性能。 相似文献
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