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,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.]
工艺参数对Mo/Cu粉末凝胶注模成形的影响
投稿时间:2016-03-25  修订日期:2016-10-07
中文关键词:  凝胶注模  Mo/Cu合金  流变行为  抗弯强度
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      本文采用甲基丙烯酸羟乙酯(HEMA)-1,6-己二醇二丙烯酸酯非水基凝胶注模体系制备了浓Mo/Cu粉末浆料。研究了分散剂用量、单体含量和固相体积分数对浆料流变行为的影响。并研究了单体含量、单体/交联剂比例、引发剂用量、温度等工艺参数对固化行为和坯体抗弯强度的影响。结果表明,固相体积分数对浆料就变行为的影响最大,其次是引发剂用量和单体含量。随着单体含量的增加和单体/交联剂比例的减小,坯体抗弯强度增加;引发剂用量对坯体抗弯强度的影响较小。根据上述结果,Mo/Cu粉末非水基凝胶注模的合理工艺参数如下:HEMA含量为25 vol.% ~ 30 vol.%, 单体/交联剂比例为10:1 ~ 15:1,引发剂用量为1.5 vol.% ~ 2.5 vol.%,固化温度在60℃与80℃之间。
Effect of processing parameters on gelcasting process for Mo/Cu powders
英文关键词:Gelcasting  Mo/Cu alloy  Rheological behavior  Flexural strength
英文摘要:
      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.
作者单位E-mail
段柏华 中南大学 材料科学与工程学院 duan-bh@csu.edu.cn 
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