Centrifugal slip casting for preparing open-cell Al₂O₃foam

详细信息   全文下载|推荐本文 |

• 出版年：2006
• 作者：YU Jing-yuan；LI Ran；LI Qiang；LI Xiao-dong；SUN Xu-dong
• 单位1：School of Material Metallurgy
• 出生年：1979
• 学历：博士研究生
• 语种：英文
• 作者关键词：centrifugal slip casting；template；settling velocity；mass segregation
• 起始页：268
• 总页数：4
• 经费资助：国家杰出青年基金（50425413）；国家自然科学基金（50672014）
• 刊名：材料与冶金学报
• 是否内版：否
• 刊频：季刊
• 创刊时间：2002
• 主办单位：东北大学
• 主编：左良
• 地址：沈阳市文化路3号巷11号东北大学114信箱
• 邮编：110004
• 电子信箱：huji@chinajournal.net.cn
• 卷：5
• 期：4
• 期刊索取号：P750.6 334

摘要

Centrifugal slip casting in prefabricated template was used to prepare open-cell Al₂O₃ foams. Aqueousα- Al₂O₃ slurries with up to 50% solid contents ( volume fraction) were prepared. The sedimentationof slurries during centrifugation was discussed with respect to the hydronamic conditions at large particle concentrations.The efect of solid contents on mass segregation was observed. Segregation phenomena were hinderedfor slurries with high solid loadings exceeding 50% ( volume fraction) . The dried and sintered behaviorsof samples were analyzed. The cell struts in green bodies had good particles packing and showed highgreen density ( 63. 4% theory density) . After sintered at 1 500 ℃ ， the cell struts of final products had highsintered density (98. 8% theory density) and homogeneous microstructure. The porosity of final products is75. 6%