Accessible Requires Authentication Published by De Gruyter February 22, 2017

Nano-particles in powder injection molding of an aluminum matrix composite: Rheological behavior, production and properties

Hassan Abdoos, Hamid Khorsand and Ali Akbar Yousefi

Abstract

Feedstocks containing 54 and 60 vol.% powder loadings were prepared using a multi-component binder and different amounts of nano-alumina (0–9 wt.%). Feedstock containing 60 vol.% powder and 6 wt.% nano-alumina had the lowest shear rate sensitivity (n). The Al feedstocks containing nanoparticles were injected, de-bound and sintered. The rate of solvent de-binding for samples containing nano-particles was slightly lower than that of similar specimens. Results showed that nano-scale additive caused increased relative density, hardness and strength of manufactured composites, but decreased shrinkage and grain size. The composite with 54 vol.% powder loading and 9 wt.% nano-alumina had the best evaluations for mechanical properties. Particle clustering caused a decline in all evaluations for mechanical properties for 60 vol.% powder loading and 9 wt.% nano-alumina sample.


*Correspondence address, Dr. Hassan Abdoos, Faculty of New Science and Technology, Semnan University, Campus 1, Semnan University, Semnan, Iran, Tel.: +982331533379, Fax: +982331533301, E-mail:

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Received: 2016-09-16
Accepted: 2016-12-08
Published Online: 2017-02-22
Published in Print: 2017-03-13

© 2017, Carl Hanser Verlag, München