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microscope (HRTEM, JEM3010, JEOL, Japan) was also used to investigate the crystallite structure of the carbon fiber after HTT. The effects of graphitization of the samples after heat treatment were... of each spectrum. 3 Results and discussion Fig.1 indicates SEM images of bare carbon fiber and carbon fiber coated with PB. As shown in Fig.1(b), PB film can be uniformly attached to the carbon......
: The continuous carbon fiber reinforced silicon carbide (C/SiC) composites were studied, and the fiber fabric 3D simulation software developed. The 2.5D fiber fabric and 3D4Dr fiber fabric C/SiC composites...仿真；力学性能 中图分类号:TB323 文献标识码:A 文章编号:1672-7207(2007)02-0200-06 Fiber fabric 3D simulation and influence......
to improve the properties of carbon fiber reinforced HA composite. Many methods have been reported to prepare ceramic coatings on carbon fibers, such as sol-gel, and electro-deposition[8-12..., the spectrum of untreated carbon fiber was a smooth curve without any peaks. However many obvious absorption peaks appeared on those of treated carbon fibers. On the spectrum of HNO3 treated fibers......
that the grooves on fiber surface deepen first and then weaken with the increase of oxidation time during the oxidation by 66% nitric acid. The surface etch of carbon fibers treated for 40 min is uniform... the ordered deposition of pyrocarbon during CVD. Key words: carbon fiber; nitric acid oxidation; pyrocarbon; CVD 炭纤维具有高比强度,高比模量,耐疲劳,抗蠕变和热膨胀系数小等一系列优异性能,成为近年来最重要的增强材料之一[1-2].其中炭/炭(C/C)复合材料是其主要的应用形式,这种复合材料以其......
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, Changsha 410083, China) Abstract: C/C-SiC composites were prepared by compression molding with carbon fiber,silicon powder,graphite powder and so on. The effects of fiber dispersion, fiber length... of composites is of brittle fracture. Key words: compression molding; carbon fiber; C/C-SiC composites; mechanical properties ......
Sintering behaviors of porous 316L stainless steel fiber feltFENG Ping(冯萍)1, LIU Yong(刘咏)1, WANG Yan(王岩)2, LI Kun(李昆)1, ZHAO Xiu-yun(赵秀云)1, TANG Hui-ping(汤慧萍)3(1. State Key Laboratory of Powder... (Northwest Institute for Nonferrous Metal Research), Xi’an 710016, China)Abstract:Isothermal sintering experiments were performed on the 316L stainless steel fiber felts with fiber diameters of 8 μm......
used as compared material were investigated. The wear surface of the samples were observed by SEM. The results show that the PAN-carbon fiber can improve the frictional stability of C/C composites... on carbon-carbon composites (fiber pre-form+CVI)[J]. Mater Sci Eng A,2008, 472(1/2): 2?14. [5] XIONG Xiang, LI Jiang-hong, HUANG Bai-yun. Impact of brake pressure on the friction and wear of carbon......
轻质碳纤维复合材料帆船桅杆的设计与制备 赫晓东1,郭琼1,杨帆1,王荣国1 (1.哈尔滨工业大学复合材料与结构研究所,哈尔滨,150001) 摘要:碳纤维复合材料与金属相比,具有重量轻,可设计性强等优点.本文目的是设计并制备轻质碳纤维复合材料桅杆.基于等刚度准则,对具有等壁厚,异型截面的中空碳纤维复合材料桅杆进行设计,并运用数值模拟技术对结构铺层进行优化.采用纤维铺放和缠绕工艺制备出长度为16m的大尺寸碳纤维复合材料帆船桅杆,与铝合金桅杆相比减重43.4%.在设计工况下,桅杆变形试验值与数值模拟结果相近. 关键词:碳纤维复合材料; 桅杆; 结构设计; 纤维铺放; 纤维缠绕工艺; carbon fiber reinforced composites; mast; structural design; fiber placement; filament winding process......
