探讨了凝胶注模成型制备Al2O3/B4C可燃毒物芯块工艺.本文系统研究zeta电位、固相含量和分散剂含量对桨体的影响,并分析了三种不同B4C颗粒对桨体的影响.通过DSC热分析可知有机单体在～265℃排除.实验结果表明:50 vol.%固相含量,3～6wt%单体,0.6 wt.%分散剂和8μmB4C是制备的最佳条件,其生坯密度>55 TD%.与干压成型相比,凝胶注模成型制备生坯微观结构均匀,气孔小且分布范围窄.
Gelcasting of Al2O3/B4 C burnable poison pellets was described in this paper.The effects of zeta potentials,solid loading,and dispersant content on the suspension were studied systematically,and three kinds of B4 C powders with very different particle sizes were used in this study.Differential scanning calorimetry(DSC)analysis indicates that the organic matter is removed at～265℃.The result shows that slurries with 50 vol.% solid,3～6wt% monomer,0.6 wt.% dispersant and 8 μm B4C are optimized conditions,and relative densities are>55% of the theoretical value in the green state. In contrast to the dry-pressing process, the green body obtained by the gelcasting process exhibits uniform microstructure and small pore sizes with a narrow distribution.
参考文献
| [1] | Chang Keun Jo;Yonghee Kim;Jae Man Noh .Burnable poison for reactivity management in a very high temperature reactor[J].Annals of nuclear energy,2009(3):255-257. |
| [2] | Xiaojian Mao;Shunzo Shimai;Shiwei Wang .Rheological characterization of a gelcasting system based on epoxy resin[J].CERAMICS INTERNATIONAL,2009(1):415-420. |
| [3] | K. Prabhakaran;P.K. Ojha;N.M. Gokhale .Effect of polymer concentration on porosity and pore size characteristics of alumina membrane substrates prepared by gelcasting[J].CERAMICS INTERNATIONAL,2009(5):2083-2085. |
| [4] | Chang-Gi Ha;Yeon-Gil June;Jae-Won Kim .Effect of particle size on gelcasting process and green properties in alumina[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):212-221. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%