Rheological behavior of SS316L gas atomized powder in bimodal particle size distribution in a composite binder system

K. R. Jamaludin, Norhamidi Muhamad, S. Y M Amin, Mohd Nizam Ab Rahman, Murtadhahadi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Rheological properties of the monomodal and bimodal MIM feedstock are presented in this paper. Coarse and fine SS316L gas atomized powders are mixed with PEG and PMMA to form a homogenous paste, which is termed as feedstock. The surface active agent used here is stearic acid. The bimodal powders are blended from 30 to 70 % of the coarse powder distribution. Results show that monomodal feedstock exhibits a higher viscosity over the bimodal feedstock at low shear rate. Binder separation is also likely to occur in the monomodal feedstock prepared with coarse powder especially at a high injection temperature. Furthermore, bimodal feedstock is less viscous than the monomodal feedstock but the particle size distribution has shown its influence on viscosity. The flow behavior index decreases when the temperature increases. The investigation also shows that the feedstock flow sensitivity depends on the fine powder distributions in the feedstock. Since all the feedstock demonstrates a good pseudo plastic behavior, it therefore is suitable to be injection molded.

Original languageEnglish
Pages (from-to)108-114
Number of pages7
JournalInternational Journal of Mechanical and Materials Engineering
Volume3
Issue number2
Publication statusPublished - 2008

Fingerprint

Particle size analysis
Powders
Feedstocks
Binders
Gases
Composite materials
Viscosity
Stearic acid
Polymethyl Methacrylate
Ointments
Surface-Active Agents
Shear deformation
Polyethylene glycols
Surface active agents
Plastics
Temperature

Keywords

  • Bimodal
  • Flow sensitivity
  • MIM feedstock
  • Particle size distribution
  • Rheology

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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abstract = "Rheological properties of the monomodal and bimodal MIM feedstock are presented in this paper. Coarse and fine SS316L gas atomized powders are mixed with PEG and PMMA to form a homogenous paste, which is termed as feedstock. The surface active agent used here is stearic acid. The bimodal powders are blended from 30 to 70 {\%} of the coarse powder distribution. Results show that monomodal feedstock exhibits a higher viscosity over the bimodal feedstock at low shear rate. Binder separation is also likely to occur in the monomodal feedstock prepared with coarse powder especially at a high injection temperature. Furthermore, bimodal feedstock is less viscous than the monomodal feedstock but the particle size distribution has shown its influence on viscosity. The flow behavior index decreases when the temperature increases. The investigation also shows that the feedstock flow sensitivity depends on the fine powder distributions in the feedstock. Since all the feedstock demonstrates a good pseudo plastic behavior, it therefore is suitable to be injection molded.",
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author = "Jamaludin, {K. R.} and Norhamidi Muhamad and Amin, {S. Y M} and {Ab Rahman}, {Mohd Nizam} and Murtadhahadi",
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T1 - Rheological behavior of SS316L gas atomized powder in bimodal particle size distribution in a composite binder system

AU - Jamaludin, K. R.

AU - Muhamad, Norhamidi

AU - Amin, S. Y M

AU - Ab Rahman, Mohd Nizam

AU - Murtadhahadi,

PY - 2008

Y1 - 2008

N2 - Rheological properties of the monomodal and bimodal MIM feedstock are presented in this paper. Coarse and fine SS316L gas atomized powders are mixed with PEG and PMMA to form a homogenous paste, which is termed as feedstock. The surface active agent used here is stearic acid. The bimodal powders are blended from 30 to 70 % of the coarse powder distribution. Results show that monomodal feedstock exhibits a higher viscosity over the bimodal feedstock at low shear rate. Binder separation is also likely to occur in the monomodal feedstock prepared with coarse powder especially at a high injection temperature. Furthermore, bimodal feedstock is less viscous than the monomodal feedstock but the particle size distribution has shown its influence on viscosity. The flow behavior index decreases when the temperature increases. The investigation also shows that the feedstock flow sensitivity depends on the fine powder distributions in the feedstock. Since all the feedstock demonstrates a good pseudo plastic behavior, it therefore is suitable to be injection molded.

AB - Rheological properties of the monomodal and bimodal MIM feedstock are presented in this paper. Coarse and fine SS316L gas atomized powders are mixed with PEG and PMMA to form a homogenous paste, which is termed as feedstock. The surface active agent used here is stearic acid. The bimodal powders are blended from 30 to 70 % of the coarse powder distribution. Results show that monomodal feedstock exhibits a higher viscosity over the bimodal feedstock at low shear rate. Binder separation is also likely to occur in the monomodal feedstock prepared with coarse powder especially at a high injection temperature. Furthermore, bimodal feedstock is less viscous than the monomodal feedstock but the particle size distribution has shown its influence on viscosity. The flow behavior index decreases when the temperature increases. The investigation also shows that the feedstock flow sensitivity depends on the fine powder distributions in the feedstock. Since all the feedstock demonstrates a good pseudo plastic behavior, it therefore is suitable to be injection molded.

KW - Bimodal

KW - Flow sensitivity

KW - MIM feedstock

KW - Particle size distribution

KW - Rheology

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