Abstract
Iron-based powder mixtures for the powder metallurgy (PM) process commonly contain solid lubricants. Both zinc stearate (ZnSt) and N,N'-ethylenebis(stearamide) (EBS), which are conventional lubricants in this field, exhibit the similarly adequate lubrication performances. However, their effects on the powder mixture flow ability are different; that is, ZnSt exhibits the better flow abilities than EBS. In this study, the adhesive and frictional properties of the five surface combinations (Fe-Fe, Fe-EBS, Fe-ZnSt, EBS-EBS, and ZnSt-ZnSt) were investigated using surface forces and resonance shear measurement. The adhesion forces obtained for all combinations were almost the same. On the other hand, frictions for Fe-EBS and EBS-EBS combinations, obtained from resonance shear measurement, were larger than others at low applied load (<ca. 1.0 mN). This result suggests that the frictional properties of lubricants at low applied load determine the powder mixture flow abilities.
| Original language | English |
|---|---|
| Pages (from-to) | 554-559 |
| Number of pages | 6 |
| Journal | Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy |
| Volume | 66 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2019 |
Keywords
- Lubricant
- N,N'-ethylenebis(stearamide)
- Powder flow ability
- Surface forces apparatus
- Zinc stearate
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Materials Chemistry