中南大学学报（自然科学版）2018，Vol.49Issue(3)：529-535,7.DOI:10.11817/j.issn.1672-7207.2018.03.003
超声外场对SiCp/7085复合材料颗粒分布与硬度的影响
Effect of ultrasonic field on particle distribution and hardness of SiCp/7085 composites
摘要
Abstract
SiCp/7085 composite was prepared by semi-solid mixture and ultrasound vibrations method, and the influence of ultrasonic vibration time and power on microstructure and Brinell hardness(HBS) of the composites was studied. The results show that mechanical stirring can realize primary mix of the SiC particles and the matrix, but it is easy to form agglomeration and gas inclusions during the mixing process. Ultrasonic vibration can effectively break up the particle micro-agglomeration, improve defects such as porosity and inclusion, and the optimized time and power in this experimental condition are 10 min and 1 kW, respectively. It renders consistency between hardness and microstructure of the composites. Under work condition of 10 min and 1 kW, the HBS reaches the maximum value 131.7 N/mm2, which is 25.7% higher than that without ultrasonic field.关键词
超声外场/SiCp/7085复合材料/颗粒团聚/布氏硬度Key words
ultrasonic field/SiCp/7085 composites/particle agglomeration/Brinell hardness分类
矿业与冶金引用本文复制引用
王坤,蒋日鹏,张立华,李瑞卿,李晓谦..超声外场对SiCp/7085复合材料颗粒分布与硬度的影响[J].中南大学学报（自然科学版）,2018,49(3):529-535,7.基金项目
国家自然科学基金面上项目(51475840) （51475840）
湖南省自然科学基金青年基金资助项目(2017JJ3391) (Projects(51475840) supported by the National Natural Science Foundation of China （2017JJ3391）
Project(2017JJ3391) supported by Natural Science Foundation of Hunan Province) （2017JJ3391）
