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Materials 2013, 6(9), 4046-4063; doi:10.3390/ma6094046

Consolidation of Hierarchy-Structured Nanopowder Agglomerates and Its Application to Net-Shaping Nanopowder Materials

* ,
Department of Metallurgy and Materials Science, Hanyang University-ERICA, Ansan, 426-791, Korea
* Author to whom correspondence should be addressed.
Received: 5 August 2013 / Revised: 6 September 2013 / Accepted: 9 September 2013 / Published: 16 September 2013
(This article belongs to the Special Issue Progress in Net-shaped PM (Powder Metallurgical) Parts)
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This paper provides an overview on our recent investigations on the consolidation of hierarchy-structured nanopowder agglomerates and related applications to net-shaping nanopowder materials. Understanding the nanopowder agglomerate sintering (NAS) process is essential to processing of net-shaped nanopowder materials and components with small and complex shape. The key concept of the NAS process is to enhance material transport through controlling the powder interface volume of nanopowder agglomerates. Based upon this concept, we have suggested a new idea of full density processing for fabricating micro-powder injection molded part using metal nanopowder agglomerates produced by hydrogen reduction of metal oxide powders. Studies on the full density sintering of die compacted- and powder injection molded iron base nano-agglomerate powders are introduced and discussed in terms of densification process and microstructure.
Keywords: hierarchical structure; consolidation; nanopowder agglomerates; net-shaping hierarchical structure; consolidation; nanopowder agglomerates; net-shaping
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Lee, J.-S.; Choi, J.-P.; Lee, G.-Y. Consolidation of Hierarchy-Structured Nanopowder Agglomerates and Its Application to Net-Shaping Nanopowder Materials. Materials 2013, 6, 4046-4063.

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