Infusible Poplar alkali lignin was converted to a fusible one as a raw material for activated carbon fibers by chemically modified and blended with a mixture of polyethylene glycol 400 (PEG 400) and s
High modulus carbon fiber composite is widely used in aerospace structural products due to its excellent characters, such as high specific stiffness, good dimension stability, ablation endurance and i
The effects of temperature and humidity on the mechanical and dielectric properties of the meta-aramid paper were studied.The results shows that the tensile strength of the meta-aramid paper is not af
SiC protective shell formed on the carbon fibers is beneficial to improve the high temperature oxidation resistance of carbon fibers.In this paper, C/SiC coaxial fibers have been rapidly synthesized b
The atomic oxygen exposure test was conducted by the space combined radiation simulator.The effect of the atomic oxygen irradiation on high-modulus carbon fibers and its composites was investigated by
To enhance antioxidant properties, SiBCN coatings were prepared on SiC fibers by dip-coating and pyrolysis ofpolyborosilazane (PBSZ) solution.The morphology, composition, structure, strength and oxida
The key to the successful application of high temperature ceramic matrix composites (CMCs) is the judicious selection and incorporation of ceramic fiber reinforcement with the proper chemical, physica
聚酰亚胺纤维是一种新型高性能纤维,具有优异耐高低温、高强高模、耐辐照、阻燃、绝缘等性能,低的吸水率和介电性能,是现有碳纤维、芳纶纤维、超高分子量聚乙烯纤维等高性能纤维的很好补充.依托北京化工大学小试技术,江苏先诺新材料科技有限公司形成了年产30吨规模的聚酰亚胺纤维制备,开发了耐高温、高强高模、高强中模及其短切纤维系列产品.
高效,高质量的制孔是碳纤维复合材料在航空航天行业应用的前提.本文采用D3mm金刚石涂层硬质合金钻头钻削T300碳纤维复合材料,研究切削参数(V=20,40,60,100,150m/min；fr=0.01,0.018,0.03,0.045,0.06mm/rev)对轴向力和制孔质量的影响规律.结果 表明,轴向力随着进给量的增大而增大,切削速度的增大而减小,并建立轴向力Fz与切削速度V和进给量fr的之间
传动轴是卫星天线阵面展开机构的关键部件，采用细长杆结构，要求承受额定扭矩，同时对其重量有严格要求。采用传统合金钢重量较重。树脂基复合材料由于具有低密度、高比强度、高比模量、耐疲劳、热膨胀系数小及一体化成型等优点，成为研制卫星用传动轴的理想材料。本文根据卫星展开机构传动轴的需求，通过对材料设计、制造工艺等进行深入研究，研制出符合卫星型号需求的星载复合材料传动轴。