Phase constitution and creep properties of Ir–Ni–Al alloys

To design high-temperature materials with good creep properties at 1773 K, the creep behavior of Ir–Ni–Al alloys was investigated. The phase constitution and microstructure of the Ir–Ni–Al alloys were examined using X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS). Compression creep tests were then carried out with some of the Ir–Ni–Al alloys at 1773 K under 30 MPa. The deformation mechanism was discussed in terms of solid-solution hardening and precipitation hardening.