Abstract
Iron-based powder mixtures for the powder metallurgy process commonly contain solid lubricants. Both zinc stearate (ZnSt) and N,NAethylenebis( stearamide) (EBS), which are conventional lubricants in this field, exhibit similarly adequate lubrication performance. However, their effects on powder mixture flowability are different; that is, powder mixtures containing ZnSt exhibit better flowability than ones containing EBS. In this study, the adhesive and frictional properties of five surface combinations (ironiron, ironEBS, ironZnSt, EBSEBS, and ZnStZnSt) were investigated using surface force and resonance shear measurements. The adhesive forces obtained for all combinations were almost the same. On the other hand, the frictional forces for the ironEBS and EBSEBS combinations obtained from resonance shear measurement were larger than the others under low applied loads (<ca. 1.0 mN). This result suggests that the frictional properties of lubricants under low applied loads determine the powder mixture flowability.
| Original language | English |
|---|---|
| Pages (from-to) | 329-334 |
| Number of pages | 6 |
| Journal | Materials Transactions |
| Volume | 63 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2022 |
Keywords
- Lubricant
- N,NB-ethylenebis(stearamide)
- Powder flowability
- Surface forces apparatus
- Zinc stearate