工艺参数对Mo/Cu粉末凝胶注模成形的影响（英文）  

Effect of Processing Parameters on Gelcasting Process for Mo/Cu Powders

作　　者：段柏华[1,2] 戚诚康 王德志[1,2] 吴壮志[1,2] 傅臻[2] 张亚松 万幸 Duan Bohua1,2, Qi Chengkang2, Wang Dezhi1,2, Wu Zhuangzhi1,2, Fu Zhen2, Zhang Yasong2, Wan Xing2(1 Key Laboratory of Ministry of Education of Non-ferrous Materials Science and Engineering, Central South University, Changsha 410083, China; 2 School of Materials Science and Engineering, Central South University, Changsha 410083, Chin)

机构地区：[1]中南大学有色金属材料科学与工程教育部重点实验室,湖南长沙410083 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《稀有金属材料与工程》2018年第3期766-772,共7页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51274246)

摘　　要：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,并讨论了单体含量、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流变行为的影响最大,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%~30%(体积分数),单体/交联剂比例为10:1~15:1,引发剂用量为1.5%~2.5%(体积分数),固化温度在60~80℃之间。A non-aqueous gelcasting system of 2-hydroxyethyl methacrylate（HEMA）-1,6-hexanediol diacrylate（HDDA）was adopted to prepare concentrated slurry of Mo/Cu powders.The effects of dispersant dosage,monomer content and solid loading on rheological behavior of slurry were studied.The effects of processing parameters such as monomer content,monomer/cross-linker ratio,initiator dosage,and temperature on the gelation behavior and green bodies’flexural strength were studied.The results show that solid loading influences the viscosity of slurry the most,followed by dispersant dosage and monomer content.The flexural strength of green bodies is increased with the increasing of monomer content and the decreasing of monomer/cross-linker ratio,while the initiator dosage has a slightly effect.On the basis of them,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 60~80 ℃.

关 键 词：凝胶注模 Mo/Cu合金 流变行为 抗弯强度 

分 类 号：TF124.3[冶金工程—粉末冶金]