Table 1.
Average compositions (at.%) of the cast and heat treated alloys ZX4, ZX6 and ZX8 and summary of the phases confirmed by XRD and microanalysis.
| Alloy | As Cast | Heat Treated | ||
|---|---|---|---|---|
| Composition | Phases | Composition | 1500 °C/phases | |
| ZX4 | Nb-25.4Ti-18.8Si-4.9Cr-5Sn | αNb5Si3, βNb5Si3, Nbss, Nb3Sn, C14-NbCr2 Laves, (Nbss + Nb5Si3)eutectic, (Nbss + NbCr2 + Nb5Si3)eutectic |
Nb-26Ti-20Si-4.3Cr-5.1Sn | Nbss, Nb3Sn, αNb5Si3, C14-NbCr2 Laves |
| ZX6 | Nb-25.2Ti-18.5Si-4.9Al-5Sn | βNb5Si3, Nbss, Nb3Sn, (Nbss + Nb5Si3)eutectic |
Nb-23.9Ti-19.3Si-4.5Al-4.4Sn | αNb5Si3, Nb3Sn |
| 1450 °C/phases | ||||
| ZX8 | Nb-23.9Ti-17.2Si-5.4Cr-4.8Al-4.6Sn | βNb5Si3, Nb3Sn, C14-NbCr2 Laves |
Nb-21.1Ti-18.6Si-5.1Cr-4Al-4.6Sn | αNb5Si3, Nb3Sn, Nbss, C14-NbCr2 Laves |