Numerical prediction of temperature distribution in thermoset composites during laser curing process

The temperature distribution in the advanced thermoset composite during the laser curing process was predicted with the use of the two-dimensional thermo-chemical model presented in this paper which also gives the governing equations based on the thermal history of the curing process. The finite-difference method was used to get the temperature distribution. This paper also deals with the effect of some factors (such as the winding velocity, the tape thickness and the laser heat source) on the temperature distribution.     

Strengthening Effect in Al_2O_(3p)/Zn-Al Composites

ＳｔｒｅｎｇｔｈｅｎｉｎｇＥｆｅｃｔｉｎＡｌ２Ｏ３ｐ／Ｚｎ－ＡｌＣｏｍｐｏｓｉｔｅｓＷａｎｇＪｕｎ１，２（王俊）ＺｈａｎｇＬｉｎｉｎｇ２（张力宁）ＣｈｅｎＦｅｎｇ２（陈锋）ＺｈａｏＨｕａｔｉｎｇ２（赵华庭）ＳｈｕＧｕａｎｇｊｉ２（舒光冀）（１Ｄｅｐ...     

Mechanical properties of short carbon/glass fiber reinforced high mechanical performance epoxy resins

To research the relationship between epoxy and fiber inherent property and mechanical properties of composite,we prepared a series of composites using three kinds of high mechanical performance epoxy resins as matrices and reinforced by the same volume fraction(5%)of short carbon and glass fiber.Their mechanical properties were investigated from the perspective of chemical structure and volume shrinkage ratio of epoxy.We analyzed their tensile strength and modulus based on the mixing rule and Halpin-Tsai eq...     

喷雾干燥工艺制备WO3—CoO复合粉的研究

喷雾干燥是喷雾转变工艺（SCP）制备纳米结构WC-Co粉末的前期工艺。章探讨了喷雾干燥过程中温度、时间、表硕活性剂等因素对WO3-CoO复合粉及纳米WC-Co复合粉制备的影响,着重研究了喷雾干燥法制备WO3-CoO复合粉的形态。     

Steam as coolant and lubricant in turning of metal matrix composites

Green cutting has become focus of attention in ecological and environmental protection. Steam is cheap, poilution-free and eco-friendly, and then is a good and economical coolant and lubricant. Steam generator and steam feeding system were developed to generate and feed steam. Comparative experiments were carried out in cutting AA6061-15 vol.% SiC （25 p.m particle size）, with cubic boron nitride （CBN） insert KB-90 grade under the conditions of compressed air, oil water emulsion, steam as coolant and lubricant, and dry cutting, respectively. The experimental results show that, with steam as coolant and lubricant, gradual reduction in the cutting force, friction coefficient, surface roughness and cutting temperature values were observed. Further, there was reduction in built up edge formation. It is proved that use of water steam as coolant and lubricant is environmentally friendly.     

石墨烯的改性修饰及其复合材料研究进展

主要综述了石墨烯的氧化、表面修饰改性及其复合材料的研究进展.氧化石墨烯是通过Hummers法、Brodie法或Staudenmaier法氧化石墨,然后再经过热解膨胀或超声分散方法制备.氧化石墨烯的表面修饰改性有非共价键修饰和共价键修饰.非共价键修饰是利用氧化石墨烯的共轭体系与其他共轭体系的小分子或高分子聚合物具有相亲性,来制备复合材料.共价键修饰则是利用氧化石墨烯中含有的大量羧基、羟基和环氧基等活性基团与有机链段进行反应,达到改性目的,以有利于制备复合材料.