Abstract
A novel wear- and oxidation-resistant Mo 2 Ni 3 Si/NiSi metal silicide composite coatings were fabricated on substrate of an austenitic stainless steel by laser cladding using Ni-Mo-Si elemental powder blends. The microstructure of the coating was characterized by optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). The high-temperature wear resistance of the coating was evaluated under sliding wear test conditions. Results show that microstructure of the coating consists of the Mo 2 Ni 3 Si primary dendrite and interdendritic Mo 2 Ni 3 Si/NiSi eutectic. Due to the presence of a large amount of hard and wear-resistant Mo 2 Ni 3 Si phase, the laser clad Mo 2 Ni 3 Si/NiSi metal silicide composite coating has excellent wear resistance under high-temperature sliding wear test conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 190-195 |
| Number of pages | 6 |
| Journal | Applied Surface Science |
| Volume | 214 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 6 Jul 2003 |
| Externally published | Yes |
Keywords
- Coatings
- Laser cladding
- Metal silicide
- Mo Ni Si
- Wear