摘要
利用高能球磨干混的方法制备B4C-Al复合粉末,研究球磨过程中转速、球磨时间对粉末粒度、B4C颗粒均匀性及界面结合的影响。结果表明,球磨转速和球磨时间是影响增强体颗粒分布均匀性以及与基体粉末界面结合的主要因素,存在一个最佳球磨转速和球磨时间使增强体颗粒分布均匀且与基体粉末的界面结合最佳。低转速球磨6h和中转速球磨3h时,增强体颗粒以偏聚的形式分布于基体粉末间隙之间,界面结合率很低。中转速球磨6h时,增强体颗粒均匀地分布于基体材料中,界面结合率较高。中转速球磨12h和高转速球磨6h时,增强体颗粒分布较均匀,界面结合率很高,但是容易形成焊合。
B4C-Al composites were fabricated by high energy milling powder metallurgy technique. The effect of velocity and time of milling on particle-size distribution, B4C particles homogeneity and interfacial bonding of the mixed-powder was investigated. The results indicate that the two factors above are important to particles distribution and interracial bonding. A specific velocity and a proper mixing time of milling make a uniform dis- tribution of B4C particles and fine interracial bonding. Milling 6h with low speed and milling 3h with mid speed make B4C particles accumulate in the gap of matrix particles and the interfacial bonding rate is low. Milling 6h with mid speed make a uniform distribution of B4 C particles and fine interracial bonding. Milling 12h with mid speed and milling 6h with high speed also make a uniform distribution and fine interfaeial bonding, but generate some agglomeration.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第B04期365-369,共5页
Journal of Functional Materials
基金
中国工程物理研究院军民两用重大资助项目(JMZD200903)
关键词
B4C-Al复合材料
高能球磨
粒度分布
界面结合
均匀性
B4C-Al composites
high energy ball milling
distribution of particles
interfacial bonding
homogeneity
