Preparation of feedstock containing water-soluble binder for powder injection moulding of silver

Authors

  • Chuanchom AUMNATE Metallurgy and Materials Science Research Institute, Chulalongkorn University, 254 Soi Chulalongkorn 12, Phyathai Road, Pathumwan, Bangkok, 10330, Thailand
  • Nithiwach NAWAUKKARATHARNANT Metallurgy and Materials Science Research Institute, Chulalongkorn University, 254 Soi Chulalongkorn 12, Phyathai Road, Pathumwan, Bangkok, 10330, Thailand
  • Nutthita CHUANKRERKKUL Metallurgy and Materials Science Research Institute, Chulalongkorn University, 254 Soi Chulalongkorn 12, Phyathai Road, Pathumwan, Bangkok, 10330, Thailand

DOI:

https://doi.org/10.55713/jmmm.v32i3.1271

Keywords:

Powder injection moulding, Silver, Polyethylene glycol, Feedstock

Abstract

Feedstock for powder injection moulding of silver was prepared using water-soluble binder composed of polyethylene glycol (PEG) and polyvinyl butyrol (PVB). Silver powders with particle size in range of 1 μm to 20 μm can be mixed with PEG/PVB binder system to form feedstocks having powder loadings of 42 vol% and 45 vol%. PEG can be removed using water leaching method while PVB can be removed by thermal debinding. Specimens retained their shapes during debinding and after debinding. Components fabricated with relatively higher powder loading resulted in higher density with lower porosity. Density of specimens containing powder loading of 42 vol% and 45 vol% and heated at 700℃ is about 43% and 46% of the theoretical value, respectively. Therefore, it can be further developed for porous materials applications.

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References

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Published

2022-09-30

How to Cite

[1]
C. AUMNATE, N. NAWAUKKARATHARNANT, and N. CHUANKRERKKUL, “Preparation of feedstock containing water-soluble binder for powder injection moulding of silver”, J Met Mater Miner, vol. 32, no. 3, pp. 75–79, Sep. 2022.

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