A new generation of refractory alloys with excellent high-temperature performance is urgently demanded for aero-engines, gas turbines, and nuclear power plants. As the service temperature of their hot-ends is reaching 1800 °C or even higher, traditional superalloys can hardly fulfill the temperature demands. Mainly composed of refractory metal elements, refractory high-entropy alloys (RHEAs) exhibit enhanced strength at temperatures above 1,200° C, causing them to attract a great deal of attention.
, is given in K). Unfortunately, little has been reported about alloys showing promising engineering application strengths at 1,800° C or above thus far.
Considering the high-temperature strength of the NbMoTaWHf RHEA and the excellent thermal stability of nitrides, the secondary strengthening of nitrides on a NbMoTaWHf-base alloy seems to be an efficient approach to realize the"win–win" situation of high temperature andA research team at the Defense Innovation Institute of China led by Professor Xiubing Liang has designed a nitride-reinforced NbMoTaWHfN refractory high-entropy alloy, which shows extremely high compressive yield...
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