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段柏华.工艺参数对Mo/Cu粉末凝胶注模成形的影响[J].稀有金属材料与工程(英文),2018,47(3):766~772.[DUAN Bohua.Effect of processing parameters on gelcasting process for Mo/Cu powders[J].Rare Metal Materials and Engineering,2018,47(3):766~772.]
Effect of processing parameters on gelcasting process for Mo/Cu powders
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Received:March 25, 2016  Revised:October 07, 2016
Key words: Gelcasting  Mo/Cu alloy  Rheological behavior  Flexural strength
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliationE-mail
DUAN Bohua School of Material Science and Engineering,Central South University duan-bh@csu.edu.cn 
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      In the present work, 2-hydroxyethyl methacrylate(HEMA)-1,6-hexanediol diacrylate(HDDA) non-aqueous gelcasting system was adopted to prepare concentrated slurry of Mo/Cu powders. The effect of dispersant dosage, monomer content and solid loading on rheological behavior of slurry was studied. The effect of processing parameters such as monomer content, monomer/cross-linker ratio, initiator dosage, temperature on the gelation behavior and green bodies’s flexural strength was studied. Results show that, solid loading influence the viscosity of slurry the most, followed by dispersant dosage and monomer content. The flexural strength of green bodies increases with the increasing of monomer content and the decreasing of monomer/cross-linker ratio, initiator dosage has a relatively slightly effect. On the basis of these, the optimum processing parameters for Mo/Cu non-aqueous gelcasting are as follows: HEMA content is 25 vol.% ~ 30 vol.%, monomer/cross-linker ratio is 10:1 ~ 15:1, initiator dosage is 1.5 vol.% ~ 2.5 vol.%, and gelation temperature is 60oC ~ 80oC.