Wang Shanqi, Shen Congxiang, Shen Xi, Song Huancheng. High Performance Resin Matrix and Its Composition for Compostie Rotor Blades[J]. Journal of Materials Engineering, 1989, 0(3): 3-6.
This paper describes a high performance resin matrix modified. The processing properties, curing reaction and condition of the resin system were studied carefully. The mechanical and thermal properties of the resin casting and its composites were also determined considerably.The resin system has a long gel time and a low viscosity, and cures at moderate temperatures (100-120C) to yield strong, high modulus resin matrix. The composites made of this resin matrix have good mechanical and thermal properties. They are used to manufacture the main rotor blades of the helicopter successfully.
Pu Suyun. Effect of Temperature on the Galvanic Corrosion Behaviour of Carbon Epoxy Composite-Metalic Fasteners[J]. Journal of Materials Engineering, 1989, 0(3): 7-9.
The galvanic corrosion behaviour of galvanic couples composed of carbon epoxy composite material and titanium alloy TC6, aluminium alloy LC4, steel 30CrMnSiNi2A has been studied by electrochemical method. The effect of temperature from 20 to 60℃ on galvanic potential and galvanic current density of galvanic couples has been studied. The different galvanic corrosion behaviours of various galvanic couples composed of carbon epoxy composite material and metal materials used for fasteners have been compared. The results show that the galvanic potentials are in the order of composite-TC6> composite-30CrMnSiNi2A> composite-LC4.
J. Brandt, F. J. Arendts, K. Drechsler W. Bottger. Improvement in Composites Performance Using New 2-D and 3-D Textile Technologies[J]. Journal of Materials Engineering, 1989, 0(3): 10-16.
Composites are gaining importance in more and more structural applications because their properties can be adapted in a wide range to the according requirements. In aerospace applications, above all, laminates of 2-D weavings or unidirectional tapes are used to build structural components. However, those composites have some disadvantages due to damage tolerance and impact properties as well as costly manufacturing. These weak points can be overcome by the use of three dimensional reinforced fiber structures, produced by new textile technologies. This can on the one hand simplify manufacturing, because the lamination process is simplified and on the other hand it leads to an improvement of properties in. thickness direction, better damage tolerance and impact behaviour. The different textile technologies and manufacturing processes, being of interest for composites, are presented. Some fundamental factors of influence on textile and impregnation process are discussed, and the potential of different reinforcing geometries are summarized.
Huang Datun, Yang Deming, Yin Xinfang, Pan Jin, Hao Yuankai, Tan Jun. The SiC Reinforced aluminium Preform Wire Fabricated by Ultrasonic Liquid Infiltration Method[J]. Journal of Materials Engineering, 1989, 0(3): 17-19.
In this paper the origin and feature of the SiC reinforced aluminium preform wire have been reported. Microstructures and mechanical properties of this preform wires obtained by improved fabrication process were examined, it's tensile strength at room temperature is higher than 1000MPa and minimum fiexural diameter achieved is not greater than 30mm. The investigation by optical and scanning electron microscope shows that fibers have been fully infiltrated by aluminium.
Zeng Shanying, Zhang Fongfan, Shen Sitang. Studies on Resin Matrix Manufactured by Hot-melting Method[J]. Journal of Materials Engineering, 1989, 0(3): 20-22.
The Ag-80/DDS system in which was added In advanced thermoplastics PES to improve its properties was described in this paper. The effect of the content of PES on the properties of matrix was studied. Compare with the unmodified system, when Ag-80 : DDS: PES=100:55:10, the system has improved the film-forming character, resistance to water property, while the other mechanical properties were at the same level, so it can be used for preparing the prepreg with hot-melting method.
Xia Zhenhai, Zhou Yaohe. The Pressure-Regulating Infiltration Technology for Metal-Matrix Composite[J]. Journal of Materials Engineering, 1989, 0(3): 23-25,43.
A new forming process for metal-matrix composite, the pressure-regulating liquid infiltration technology, has been set up on the basis of theoretical analysis. The influence of the processing parameters on the quality of carbon fibres reinforced aluminium alloy has been investigated. It is shown that the process of infiltration and solidification of metal-matrix composite is mainly controlled by pressure-regulating velocity. High quality composite is able to be formed at low temperature and pressed by using the pressure-regulating liquid infiltration technology.
Wang Yulin, Liu Zhaonian, Fan Danan, Li Guojun, Wan Yizao. Fabrication of C/Cu Composite and Its Influence on Structures and Properties[J]. Journal of Materials Engineering, 1989, 0(3): 26-30.
A continuous three-step electrodepositing installation has been designed and manufactured. The carbon fiber reinforced copper composites obtained by electrodepositing and hot pressing method in vaccum are studied, and the influences of hot pressing parameters and fiber volume fraction on the structures and properties of C/Cu composite are investigated.
Li Zhengwang, Qin Zhijing. Mixed Weibull Distribution Model for Strength of CFRP[J]. Journal of Materials Engineering, 1989, 0(3): 31-34.
The static tensile strength and residual fatigue strength of carbon epoxy laminates were analyzed statistically by graphic method according to mixed three-parameter Weibull distribution model in this investigation. And the distribution model was discussed combined with the failure mechanism also. The results showed that the statistical characteristic for static strength and residual fatigue strength of carbon epoxy laminates could be properly described by this distribution model.
Zhan Meizhen, Liu Dongxun. Effect of Temperature and Moisture on Carbon Fiber/Epoxy Composite[J]. Journal of Materials Engineering, 1989, 0(3): 35-37,19.
The changes of weight and dimension for 4211 carbon fiber/epoxy composite as a function of the aging time under different temperature and humidities have been studied. The effect of the increase of absorbing water time and the water content on the flexural and interlaminar shear properties of the composite at room and high temperature has been discussed.
Zhang Xuezhong, Zhu hong. Effect of Composition on Resin Behaviors[J]. Journal of Materials Engineering, 1989, 0(3): 38-40,34.
A study was conducted to make sure the effect of composition on Tg, moisture and dynamic property of the resin and the effect of catalyst on rheology behavior. Since the pressure window has been widened in composite material forming, the multiple properties of the resin are more reasonable and it can be operated easily.
Wang Yusheng, Yu Kun, Dai Nanrong. Effect of Thermal Exposure of B/Al Composite Wires on the Strength of the Fibre Reinforcement[J]. Journal of Materials Engineering, 1989, 0(3): 41-43.
The effect of thermal exposure of B/Al composite wires on the strength of the fibre reinforcement has been studied in this paper. The primary investigation has been carried out for the interfacial information between the fibre and the matrix by Auger Electron Spectroscopy (A E S).
Wang Shuzhong, Li Lingxin, Xiao Ruojian. Low-density Reinforcement-PPT A——A New Material[J]. Journal of Materials Engineering, 1989, 0(3): 44-46.
PPTA-pulp is a new material for reinforcement. It is a polyamide material in supershort fiberlike form, possesses surface fibrillation and branched-fibril. Some of its excellent properties, such as high modulus, high strength, thermal resistance, are very similar to Kevlar fiber's, since it is also formed at liquid state. Large surface area and low-density property can be obtained because of the special formation process of PPTA-pulp. The research results show that PPTA-pulp can be used as a perfect material to reinforce plastics (FRP,FRTP), rubber and to substitute asbestos.
