Abstract
Dual-phase intermetallic wear resistant alloy with Ti5Si3 as the reinforcing phase and intermetallic TiCo as the toughening matrix was fabricated by the laser melting deposition process. The microstructure and composition of the TiCo/Ti5Si3 intermetallic alloy was characterized by OM, SEM, XRD and EDS. Metallic dry sliding wear property of the alloy was evaluated at room-temperature. The effect of toughening phase TiCo content on the microstructure, hardness and wear resistance of the TiCo/Ti5Si3 intermetallic alloy was investigated. The results indicate that the TiCo/Ti5Si3 intermetallic alloy has fine microstructure consisting of Ti5Si3 primary block-like phase uniformly distributed in the TiCo/Ti5Si3 eutectic structure. The alloy has excellent wear resistance under dry sliding wear test conditions. The volume fraction of the Ti5Si3 primary phase and the hardness of the TiCo/Ti5Si3 intermetallic alloy decrease with increasing of TiCo content, while the toughness and wear resistance of the alloy increase. The excellent wear resistance of the TiCo/Ti5Si3 intermetallic alloy was attributed to the high hardness of Ti5Si3 phase and the good toughness of TiCo phase.
| Original language | English |
|---|---|
| Pages (from-to) | 2194-2198 |
| Number of pages | 5 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 36 |
| Issue number | 12 |
| State | Published - Dec 2007 |
| Externally published | Yes |
Keywords
- Intermetallics
- Laser melting deposition
- TiCo/TiSi
- Wear resistance