Abstract
Previous studies have indicated that Ir-Nb-Zr ternary alloys exhibited better creep properties than Ir-Nb binary alloys. In this work, research on phase relationships and creep properties of Ir-Nb-X (X = Hf, Ta, and Ti) ternary alloys was carried out, from the phase constituent to the creep property. The fcc/L12 two-phase structure was detected in all the alloys. The phase relationship concentrating on the fcc and L12 phases at 2000 °C in the three ternary systems was established. Both fcc and L12 phases formed a continuous solid solution from the Ir-Nb side to the Ir-X (X = Hf, Ta, and Ti) side. The lattice misfit between the fcc and L12 phases was estimated; the Ir-Nb-Hf alloys showed the highest value, while the Ir-Nb-Ti alloys showed the smallest one. The creep properties at high temperature of some alloys were tested. Ir-Nb-Hf exhibited the strongest creep resistance among these three kinds of alloys.
| Original language | English |
|---|---|
| Pages (from-to) | 191-197 |
| Number of pages | 7 |
| Journal | Materials Science and Engineering A |
| Volume | 412 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 2005 Dec 5 |
| Externally published | Yes |
Keywords
- Creep property
- High temperature
- Ir-base ternary alloy
- Lattice misfit
- Phase relationship
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering