【作者】 刘鹏茹； 郝世明； 谢敬佩；

【Author】 LIU Peng-ru;HAO Shi-ming;XIE Jing-pei;School of Physics and Engineering, Henan University of Science and Technology;Provincial and Ministerial CoConstruction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology;School of Materials Science and Engineering, Henan University of Science and Technology;

【机构】 河南科技大学物理工程学院； 有色金属新材料与先进加工技术省部共建协同创新中心； 河南科技大学材料科学与工程学院；

【摘要】 为了能够利用放电等离子烧结(SPS)技术制备较高尺寸的SiCp/Al复合材料,本文利用SPS技术制备了高度为20 mm以上的30vol.%SiCp/2024Al复合材料,并研究了烧结温度和冷压压强对复合材料显微组织、力学性能之间的影响。结果表明:30vol.%SiCp/Al复合材料中碳化硅颗粒不存在明显的团聚现象,分散较为均匀。在烧结温度为480℃,压片机表示压强为8 MPa的制备条件下,制备出的样品能够实现上、中、下三部分显微组织基本一致,相对密度相差最大仅为0.7%(上部分与下部分),相对密度达到95%以上。提高烧结温度和冷压压强均可继续提高复合材料的相对密度和抗压强度。在烧结温度540℃,压片机表示压强10 MPa时,材料的相对密度达到99.7%,压缩强度为585.3 MPa。更多还原

【Abstract】 In order to prepare SiCp/Al composites with higher size by spark plasma sintering(SPS),30vol.% SiCp/2024Al composites with a height of more than 20mm were prepared by SPS, and the effects of sintering temperature and cold pressing pressure on the microstructure and mechanical properties of the composites were studied. The results show that the silicon carbide particles in the 30vol.% SiCp/Al composite have no obvious agglomeration phenomenon, and the dispersion is relatively uniform. Under the sintering temperature of 480 ℃ and the pressure indicated by the tablet press of 8Mpa, the microstructure of the prepared samples can be basically the same in the upper, middle and lower parts. The maximum difference in relative density is only 0.7%(upper and lower parts), and the relative density is more than 95%. The relative density and compressive strength of composites can be improved by increasing sintering temperature and cold pressing pressure. When the sintering temperature is 540 ℃, and the pressure indicated by the tablet press is 10 MPa, the relative density of the material reaches 99.7%, and the compressive strength is 585.3MPa.更多还原