【作者】 吕秀启； 董金平； 戴兴建；

【Author】 LV Xiu-qi;DONG Jin-ping;DAI Xing-jian;Tsinghua University;

【机构】 清华大学工程物理系；

【摘要】 为了提高碳纤维/环氧树脂基复合材料转筒内壁的耐腐蚀性、导热性以及密封性,对转筒内壁进行磁控溅射镀铝和粘贴铝箔。利用光学显微镜和SEM/EDS对厚为4.5μm、8.0μm及12.5μm三种铝箔进行表面分析;采用划刻法、拉拔法以及剪切法对镀铝层和铝箔与转筒的黏结强度进行测量;并对内壁含有镀铝或铝箔的圆环进行超高速旋转实验,分析镀铝层和铝箔在离心力场下随圆环的应力应变情况。结果表明:厚度为4.5μm的镀铝层均匀度差、不能在转筒内形成连续完整的内衬层,划刻后表面镀铝层脱落翘曲较小,拉拔法测得粘结强度在0.40~0.55 MP,剪切法测得黏结强度在1.25~1.50 MP,400 m/s高速旋转后,圆环与转子结合处因接触应力过大,转子内壁凹陷而产生镀铝层脱落,其他区域表面形貌无明显变化,厚度为12μm的镀铝层可在转筒内形成一个连续的内衬层,表面划刻后镀铝层脱落较多,翘曲较大;铝箔可在表面形成光滑的金属内衬,表面形貌较好,划刻后表面脱落翘曲较小,采用拉倒法测得铝箔与复合材料表面的黏结强度基本在0.45~0.50 MP之间。综上所述,相对于内表面磁控溅射镀铝,表面贴覆铝箔更适合于复合材料离心机转筒。更多还原

【Abstract】 In order to improve the corrosion resistance,thermal conductivity and sealability of the internal surface of carbon fiber/epoxy composite material centrifuge rotor drum,magnetron sputtering aluminum and pasting an aluminum foil on the inner wall of the drum are adopted to realize the aim.By means of XRD,SEM/EDS and OM,the surface topography of aluminum coated(thickness of5μm and 12μm) and aluminum foil(12μm) are observed and analyzed;the cohesion of between aluminum coated(or aluminum foil) and substrate material(CFRP) is measured by scratching experiment,direct drawing experiment,and shear test.Besides,the ultra-high-speed rotation experiment of CFRP ring is carried out to analyze stress and strain of coated aluminum(or aluminum foil) which is adhered on the ring.The results showed aluminum foil pasted on inner surface do better performance than magnetron sputtering aluminum on CFRP centrifuge rotor drum.更多还原