Abstract
Ti-Al based alloy porous materials were fabricated through cold pressing and pressureless sintering of Ti/Al elemental powder mixtures. The influence of Al content on the swelling behavior, pore structure properties and pore formation mechanism were investigated in detail. The results show that swelling effect and pore formation take place because of the different diffusivities of Ti and Al during reaction sintering. The swelling and porosity increase with increasing of the Al content, but when the Al content (mass fraction) exceeds 60%, the swelling begins to suppress and the porosity begins to decrease. The prime reason for the pore formation is considered to be the existence of the porosity in green compacts and Kirkendall effect in the process of reactive synthesis.
| Original language | English |
|---|---|
| Pages (from-to) | 337-342 |
| Number of pages | 6 |
| Journal | Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research |
| Volume | 21 |
| Issue number | 4 |
| State | Published - Aug 2007 |
Keywords
- Kirkendall effect
- Metallic materials
- Porous material
- Swelling behavior
- Ti-Al alloy