摘要
采用正交试验设计方案,利用湿法球磨+复压复烧方法制备了RGO(还原氧化石墨烯)/Al基复合材料。通过直观分析和方差分析考察了复压复烧工艺参数对RGO/Al基复合材料相对致密度、显微硬度、平均晶粒尺寸的影响显著程度。采用综合平衡法获得了最佳制备工艺参数:初压压力为350MPa,初烧温度为580℃,复压压力为1 000 MPa,复烧温度为490℃。该优化工艺制备的RGO/Al基复合材料的相对密度、显微硬度(HV)、平均晶粒尺寸和抗拉强度分别为99.81%、69.5、16.05μm和212.87MPa。显微组织观察表明,石墨烯主要分布于铝晶粒晶界处,起细晶强化作用。
The RGO/Al matrix composites were prepared by wet ball milling and repressing and re-sintering process,and the preparation parameters were designed by orthogonal experimental.The influence of the pressure and temperature on the relative density,micro-hardness and average grain size of the composites was analyzed by the intuitive and variance analysis.The optimized process parameters were obtained by comprehensive balance method as follows：the pre-compaction pressure of 350 MPa,the pre-sintering temperatures of 580℃,the recompacting pressure of 1 000 MPa and the resintering temperatures of 490℃.The microhardness,relative density,average grain size and tensile strength of the alloy prepared by the optimized process reach 69.5 HV,99.81%,16.05μm and 212.87 MPa,respectively.Microstructure analysis reveals that graphene is mainly distributed in grain boundaries of aluminum grains and played a role of fine grain strengthening.
作者
胡林丽
于艳丽
黄琳莲
蔡荣辉
郑克凡
Hu Linli,Yu Yanli,Huang Linlian,Cai Ronghui,Zheng Kefan(1.Department of Materials and Engineering,Jiangxi Vocational College of Mechanical and Electrical Technology;2.Jiangxi Province Machinery Senior Technician School;3.School of Materials Science and Engineering,Nanchang Hangkong Universit)
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2018年第10期1116-1120,共5页
Special Casting & Nonferrous Alloys
基金
江西省教育厅青年科研资助项目(GJJ60684
GJJ16363)
关键词
RGO/Al基复合材料
复压复烧
制备工艺优化
RGO/Al Matrix Composites
Repressing and Re-sintering Process
Optimization of Preparation Process
作者简介
胡林丽，女，1982年出生，讲师，江西机电职业技术学院材料工程系，南昌（330013），电话：0791-86453203．Email：hulinli98012@126．com
