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Design of trimodal Fe micro-nanopowder feedstock for micro powder injection molding

Title
Design of trimodal Fe micro-nanopowder feedstock for micro powder injection molding
Author
이재성
Keywords
mu-PIM; Fe trimodal powder feedstock; Torque rheometer; Microstructure; Homogeneity; SINTERING BEHAVIOR; MICROSTRUCTURAL DEVELOPMENT; ZIRCONIA NANOPARTICLES; HYDROGEN REDUCTION; MIXTURES; PACKING; DENSIFICATION; PREDICTION; COMPACTION; COMPONENTS
Issue Date
2017-04
Publisher
ELSEVIER SCIENCE BV
Citation
POWDER TECHNOLOGY, v. 317, Page. 1-5
Abstract
The design of the trimodal powder feedstock and its feasibility for micro powder injection molding (mu-PIM) were investigated. The feedstock was prepared by mixing Fe micropowder (D-50 = 4 mu m) and nanopowder agglomerate composed of a bimodal particle distribution (D-50 = 330 nm and D-50 = 30 nm, respectively) with low viscosity wax-based binders. The homogeneity of the feedstock was evaluated by torque rheometer, microstructure observations, binder burnout analysis, and an extrusion test. The trimodal concept in this study effectively improved the powder loading up to 72 vol%, and the feedstock with 70 vol% powder loading exhibited good homogeneity and flowability. By using the feedstock, the microparts were successfully replicated with sufficient shape retention to be potentially useful for a range of mu-PIM applications. (C) 2017 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0032591017303480https://repository.hanyang.ac.kr/handle/20.500.11754/71957
ISSN
0032-5910; 1873-328X
DOI
10.1016/j.powtec.2017.04.051
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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