Rheological Investigations on the Flow Behavior of Polymer-Microsized Iron Powder Composites

被引:4
作者
Hanemann, T. [1 ,2 ]
Honnef, K. [2 ]
机构
[1] Forschungszentrum Karlsruhe, Inst Mat Res, D-76021 Karlsruhe, Germany
[2] Univ Freiburg, Dept Microsyst Engn, D-79110 Freiburg, Germany
关键词
MECHANICAL-PROPERTIES; REPLICATION; METAL; MICROCOMPONENTS; MICROSTRUCTURES; FEEDSTOCK; PARTS; MOLD;
D O I
10.1002/pc.20663
中图分类号
TB33 [复合材料];
学科分类号
摘要
With respect to the fabrication of metal parts carrying surface relief microstructures using composite reaction molding as a rapid prototyping variant of micrometal injection molding, the influence of microsized iron powder on the viscosity of different unsaturated polyester resins applied as polymer binder has been investigated systematically. The initial binder viscosity determines the viscosity of the composite and hence the accessible critical filler load. A further dilution of the unsaturated polyester resin with styrene allows a significant increase of the filler load at constant shear rate and temperature from 36 up to 57 vol% iron content. A successful estimation of the critical filler load using different established empirical models initially developed for ceramic-filled solutions or dispersions is possible. A pronounced flow activation energy increase at high iron loads was also observed. POLYM. COMPOS., 30:1114-1118, 2009. (C) 2008 Society of Plastics Engineers
引用
收藏
页码:1114 / 1118
页数:5
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