A conventional hydrogenation disproportionation desorption and recombination (HDDR) process hits been applied to Pr-2(Fe,Co,Zr)(14)B alloys. X-ray diffraction (XRD) and Mossbauer spectroscope slum that an intermediate metastable boride. Pr(Fe,Co)(12)B-6 can be found in the disproportionated powers processed at 800degreesC and above. During the recombination, this phase remains during the initial stages but disappears with longer recombination treatment. (C) 2002 Elsevier Science B.V. All rights reserved.
- boride phase