摘要
随着高能球磨时间的增加 ,Al,Ti和 C粉料混合物颗粒的尺寸不断细化 ,各元素的分布也愈均匀 ,并且粉料相互团聚成团聚体。颗粒内的晶粒也不断细化 ,晶粒畸变 ,晶体内部缺陷增多 ;球磨一定时间后 ,形成纳米晶 ,甚至产生非晶组织。这些因素都有助于扩散 。
Along with the increase in the time of high-energy ball milling, the grain size of Al-Ti-C powder mixture is decreased continuously and the distribution uniformity of each element in the mixture is improved obviously. Meanwhile, the powders are aggregated with each other. In addition, the crystal size within each powder particle is also decreased during ball milling, while the defects in the crystal are increased. After milling for a certain time, the nano-crystals are formed. Going a step further, the amorphous structure will be also produced. These factors are beneficial to diffusion, promoting the completion of the synthesis reactions.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2002年第2期33-36,共4页
Acta Materiae Compositae Sinica
基金
国家自然科学基金资助项目 (5 98710 3 8)
西北工业大学国家凝固重点实验室资助项目
