Influence of binder composition on the rheological behavior of injection-molded microsized SiC suspensions
Influence of binder composition on the rheological behavior of injection-molded microsized SiC suspensions作者机构:School of Materials Science and EngineeringUniversity of Science and Technology Beijing
出 版 物:《Journal of University of Science and Technology Beijing》 (北京科技大学学报(英文版))
年 卷 期:2008年第15卷第3期
页 面:297-301页
核心收录:
学科分类:0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程(可授工学、理学学位)] 080502[工学-材料学] 0813[工学-建筑学] 0703[理学-化学] 0802[工学-机械工程] 0814[工学-土木工程] 0801[工学-力学(可授工学、理学学位)] 0702[理学-物理学]
基 金:the National Natural Science Foundation of China(No.50274014)
主 题:SiC powder injection molding rheology binder
摘 要:The influence of four kinds of binders consisting of paraffin wax (PW), random-polypropylene (RPP), high-density polyethylene (HDPE), and stearic acid (SA) on the theological behavior of injection-molded SiC feedstocks was investigated over a temperature range of 150℃ to 180℃ and a shear rate range of 4 s^-1 to 1259 s^^-1. The results showed that all the feedstocks exhibited pseudoplastic flow behavior. The wax-based binder of multipolymer components (PW-RPP-HDPE) exhibited better comprehensive rheological properties compared with the binder of monopolymer components (PW-RPP or PW-HDPE). The addition of 5wt% SA to the binder could reduce the viscosity of the feedstock but enhance the rheological stability by improving the wettability between the binder and the SiC powder. The binder of 65wt% PW + 15wt% HDPE + 15wt% RPP + 5wt% SA was found to be a better binder for microsized SiC injection molding.