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材料研究学报  2008, Vol. 22 Issue (5): 473-478    
  论文 本期目录 | 过刊浏览 |
铝粉固相烧结过程中的微结构演化
许峰;胡小方;赵建华;蒋锐
中国科学技术大学 中国科学院材料力学行为和设计重点实验室;合肥
中国科学技术大学 中国科学院材料力学行为和设计重点实验室;合肥
引用本文:

许峰; 胡小方; 赵建华; 蒋锐 . 铝粉固相烧结过程中的微结构演化[J]. 材料研究学报, 2008, 22(5): 473-478.

全文: PDF(715 KB)  
摘要: 在铝粉末样品的固相烧结过程中使用同步辐射CT(SR--CT)技术对其进行实时投影成像, 用滤波反投影算法重建得到了铝粉末在烧结过程中不同时刻的内部微结构的二维断层重建图像, 并用数字图像处理技术得到了三维重建图像; 通过重建图像清晰地观测到样品在3个烧结阶段中颗粒的接触、烧结颈的形成、 晶粒和气孔的长大以及气孔球化并收缩等现象, 从而实现了对铝粉末烧结过程的实时和无损观测. 统计了样品在不同烧结时刻的孔隙率、孔隙率随着烧结时间和烧结时间对数的变化曲线, 并根据曲线分析了样品在不同烧结时刻致密化速率的变化, 得到了烧结中期孔隙率与时间对数的线性关系, 结果与现有烧结理论吻合.
关键词 材料检测与分析技术固相烧结    
Key words
收稿日期: 2007-09-28     
ZTFLH:  O766  
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