摘要
通过对高能球磨过程中粉末的组织形态、粒度及Al2 O3的分布等进行跟踪分析 ,讨论了球磨时间以及Al2 O3含量对复合粉末粒度、晶粒尺寸、组织形态及Al2 O3弥散强化效果的影响。结果表明 :Al2 O3粉和Al粉经高能球磨后 ,得到了组织均匀细小的复合粉末 ,经压制烧结后 ,烧坯的显微硬度和致密度提高很多 。
By analyzing the microstructure of powder, particle size and dispersion state of Al 2O 3 during high-energy ball milling (HEBM), effects of milling time and content of Al 2O 3 on particle size, crystal size, microstructure and spatial distribution of Al 2O 3 are discussed. Results show that the composites prepared by HEBM have fine size, well distributed microstructure. After pressing and sintering, micro hardness and relative density are raised greatly.
出处
《机械工程材料》
CAS
CSCD
北大核心
2002年第5期26-29,共4页
Materials For Mechanical Engineering
基金
云南省自然科学基金重点项目 (98E0 0 3Z)
关键词
高能球磨
弥散强化
复合粉末
二次粒子
high energy ball milling
dispersed reinforcement
composite powder
second particle
