[1]刘斌,陈锋.TiH2含量对粉末冶金泡沫铝孔结构的影响[J].东南大学学报(自然科学版),2005,35(2):257-260.[doi:10.3969/j.issn.1001-0505.2005.02.021]
 Liu Bin,Chen Feng.Effect of TiH2 addition on pore structures of aluminum foam prepared by power metallurgy route[J].Journal of Southeast University (Natural Science Edition),2005,35(2):257-260.[doi:10.3969/j.issn.1001-0505.2005.02.021]
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TiH2含量对粉末冶金泡沫铝孔结构的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第2期
页码:
257-260
栏目:
材料科学与工程
出版日期:
2005-03-20

文章信息/Info

Title:
Effect of TiH2 addition on pore structures of aluminum foam prepared by power metallurgy route
作者:
刘斌 陈锋
东南大学材料科学与工程系, 南京 210096
Author(s):
Liu Bin Chen Feng
Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
孔结构 均匀性 TiH2 粉末冶金 泡沫铝
Keywords:
pore structures homogeneity TiH2 powder metallurgy aluminum foam
分类号:
TG146.2
DOI:
10.3969/j.issn.1001-0505.2005.02.021
摘要:
通过对泡沫铝剖面进行数字图像处理和统计分析,研究了粉末冶金法制备泡沫铝时发泡剂质量分数对孔隙率、孔径标准差及大孔面积率等孔结构参数的影响.实验结果表明,过量的TiH2导致大孔增多、孔结构均匀性降低; TiH2过少则使孔隙率降低,成型性较差.TiH2质量分数在0.2%~0.6%之间时,得到的泡沫铝孔隙率为70%~77%,此时大孔缺陷较少,孔结构均匀细密.采用胞壁熔体在毛细力作用下的流动模型,讨论了熔体泡沫合并大孔形成机制.综合考虑孔隙率、孔隙均匀性和TiH2有效利用率等因素,确定了TiH2的最佳添加范围.
Abstract:
The effect of different TiH2 addition on the pore structure parameters of aluminum foam, such as porosity, standard deviation of pore sizes and the area ratio of huge pores, was investigated by using digital image process and statistical analysis. It is shown that excessive TiH2 addition results in the increase of huge pores and poor pore structures, and insufficient TiH2 addition leads to lower porosity and poor foamability of the precursor. samples with 70%-77% porosity and homogeneous pore structures can be obtained while TiH2 addition ranges between 0.2%-0.6%. The mechanism of huge pore formation is briefly discussed using the model of capillarity-driven flow of cell wall melt. And the optimal range of TiH2 addition is determined by considering the porosity and homogeneity of the foam and the availability of the added TiH2.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 教育部回国留学人员启动基金资助项目.
作者简介: 刘斌(1976—),男,硕士生,助理工程师; 陈锋(联系人),男,博士,教授,博士生导师,fengchen@seu.edu.cn.
更新日期/Last Update: 2005-03-20