离心成形法制备开孔氧化铝泡沫

材料与冶金学报, 2006, 5(4): 268-275. doi: 10.3969/j.issn.1671-6620.2006.04.007

离心成形法制备开孔氧化铝泡沫

于景媛 ^1, , 李然 ^2, , 李强 ^3, , 李晓东 ^4, , 孙旭东 ^5,

1.东北大学

2.School of Material & Metallurgy, Northeastern University, Shenyang 110004, China

3.School of Material & Metallurgy, Northeastern University, Shenyang 110004, China;College of Materials & Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001, China

4.School of Material & Metallurgy, Northeastern University, Shenyang 110004, China

5.东北大学

基金项目: 国家自然科学基金(50425413) 国家自然科学基金(50672014)

Centrifugal slip casting for preparing open-cell Al2O3 foam

Keywords： centrifugal slip casting

Centrifugal slip casting in prefabricated template was used to prepare open-cell Al2O3 foams. Aqueous α- Al2O3 slurries with up to 50% solid contents (volume fraction) were prepared. The sedimentation of slurries during centrifugation was discussed with respect to the hydronamic conditions at large particle concentrations. The effect of solid contents on mass segregation was observed. Segregation phenomena were hindered for slurries with high solid loadings exceeding 50% ( volume fraction). The dried and sintered behaviors of samples were analyzed. The cell struts in green bodies had good particles packing and showed high green density ( 63.4% theory density ). After sintered at 1500 ℃, the cell struts of final products had high sintered density ( 98. 8% theory density) and homogeneous microstructure. The porosity of final products is 75.6%

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