The effect of feedstock composition on defect evolution in powder injection molded ceramic microarrays using simulations and experiments Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/xs55mg03j

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Micro Powder injection molding (μPIM) is a cost-effective technique for producing small, complex, precision parts in high volumes from ceramic and metal nanoparticles. This study focuses on research conducted on fabrication of Micro Ceramic Arrays (MCAs) parts using μPIM. MCAs are widely used as the major components and design features for many microsystems in various applications, such as micro fluidics, micro optics, micro heat exchangers, micro transducers, micro reactors, medical instruments and devices, IC packaging, etc. However, lots of defects are associated while molding these MCAs with micro features. These defects can be avoided by carefully studying the part geometry, feedstock properties and studying the effect of change in processing parameters on the fill of micro features. In this study we dealt with all the three methods to avoid defects with a concentration on effect of feedstock properties on defect occurrence. In order to have a good understanding of the μPIM process and to provide the necessary data for simulation studies, characterization of the feedstock is essential. In this thesis, characterization of feedstock consisting of alumina nanopowder (average particle size of 400 nm) with ethylenepropylene/ wax (Standard Mix) and polyacetal binder systems (Catamold AO-F, BASF) for μPIM is reported. It is found that the Standard Mix system has lower viscosity and heat capacity compared to the Catamold AO-F. However, it can be inferred from the results that Catamold AO-F fills the microcavities (50μm) in a more efficient way, despite having a higher viscosity at higher shear rates. These results from Moldflow Simulations were further varied using experimental platforms and scanning electron microscopy.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Subject
Rights Statement
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2009-01-12T19:11:42Z (GMT) No. of bitstreams: 1 Laddha_thesis.pdf: 7340468 bytes, checksum: cfab928e95dbd16be838da0ff27810d8 (MD5)
  • description.provenance : Submitted by Sachin Laddha (laddhas@onid.orst.edu) on 2008-12-10T03:11:43Z No. of bitstreams: 1 Laddha_thesis.pdf: 7340468 bytes, checksum: cfab928e95dbd16be838da0ff27810d8 (MD5)
  • description.provenance : Made available in DSpace on 2009-01-12T19:11:43Z (GMT). No. of bitstreams: 1 Laddha_thesis.pdf: 7340468 bytes, checksum: cfab928e95dbd16be838da0ff27810d8 (MD5)
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2008-12-23T18:44:20Z (GMT) No. of bitstreams: 1 Laddha_thesis.pdf: 7340468 bytes, checksum: cfab928e95dbd16be838da0ff27810d8 (MD5)

Relationships

In Administrative Set:
Last modified: 08/14/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items