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 language | English |
|---|---|
| Pages (from-to) | 108-114 |
| Number of pages | 7 |
| Journal | International Journal of Mechanical and Materials Engineering |
| Volume | 3 |
| Issue number | 2 |
| Publication status | Published - 2008 |
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Keywords
- Bimodal
- Flow sensitivity
- MIM feedstock
- Particle size distribution
- Rheology
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
Cite this
Rheological behavior of SS316L gas atomized powder in bimodal particle size distribution in a composite binder system. / Jamaludin, K. R.; Muhamad, Norhamidi; Amin, S. Y M; Ab Rahman, Mohd Nizam; Murtadhahadi.
In: International Journal of Mechanical and Materials Engineering, Vol. 3, No. 2, 2008, p. 108-114.Research output: Contribution to journal › Article
}
TY - JOUR
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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UR - http://www.scopus.com/inward/citedby.url?scp=64649093568&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:64649093568
VL - 3
SP - 108
EP - 114
JO - International Journal of Mechanical and Materials Engineering
JF - International Journal of Mechanical and Materials Engineering
SN - 1823-0334
IS - 2
ER -