【作者】 吕映宾；

【导师】 马乃恒； 王浩伟；

【作者基本信息】 上海交通大学 ， 材料加工工程， 2007， 硕士

【摘要】 宇航、航空、尖端武器和集成电路等高科技的飞速发展,对材料提出了更高的要求,传统的单相材料越来越难以满足尖端科技高速发展的需求,颗粒增强铝基复合材料以其轻质、高比强度、高比模量及良好的可设计性等优点,为制备在多方面都具有优良性能的材料提供了可能。颗粒增强铝基复合材料虽然具有上述优异性能,但是成型和机加工困难等问题,一直是阻碍其实际应用的难题。首先,在颗粒增强铝基复合材料制备和成形过程中,因为大颗粒的沉降和小颗粒的团聚等问题,难以得到组织和性能稳定的复合材料;其次,由于颗粒对切削刀具的剧烈磨损,使得复合材料的机加工异常困难,即使制备出性能优异的复合材料也会因为无法机加工而难以应用,因此复合材料的机加工问题已经成为阻碍其推广应用的瓶颈问题。论文在研究增强体颗粒在复合材料熔体中沉降规律的基础上,以搅拌铸造法制备外加颗粒增强铝基复合材料及混合盐法制备原位颗粒增强铝基复合材料为基础,结合两种制备方法和两种材料各自的优点,尝试开发出一种既具有良好机械性能,又具有良好成型性能和机加工性能的颗粒增强铝基复合材料,同时也为改善其它复合材料的成型性能和机加更多还原

【Abstract】 The quickly development of space navigation, aviation, advanced weapons and integrate circuit has greatly raised the requirements to the materials. Traditional single-phase materials can’t meet those requirements. However, particle reinforced aluminum matrix composites have the possibility to meet those requirements because of their low density, high specific strength, high specific modulus, good property design ability and so on.Although particle reinforced aluminum matrix composites have those excellent properties, they also have some problems, such as bad molding ability and bad machining ability, which have blocked them badly in the real application. First, during their fabrication and molding, the big particles are prone to deposit and the fine particles are prone to reunite, which makes it difficult to get homogeneous composites. Secondly, because the particles’serious wear to the cutter, the composites are mostly difficult to be machined, which makes it impossible to be applied although we may fabricate good property composites.The purpose of this project is to develop a new particle reinforced metal更多还原