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On the occurrence of Z-phase in a creep-tested 10 % Cr steel

Abstract Electron microscopy studies on a creep-tested 10 % Cr steel have revealed the presence of a complex nitride precipitate which has been previously assigned as modified Z-phase. This paper describes how the Z-phase can be efficiently detected by energy-filtering transmission electron microscopy. The results of electron diffraction, electron energyloss spectroscopy and energy-dispersive X-ray analysis studies lead to a quantitative description of the modified Z-phase of the type Cr(V, Nb) N.