Abstract
The phase diagram of the Ho-Ni binary system was investigated by X-ray diffraction, differential thermal analysis, optical microscopy and electron probe microanalysis techniques. The existence of eight intermediate phases has been confirmed: Ho 3Ni, Ho 3Ni 2, HoNi, HoNi 2, HoNi 3, Ho 2Ni 7, HoNi 5 and Ho 2Ni 17. The homogeneity region of the HoNi 2 phase extends from 65.6 to 66.7 at.% Ni. The other phases are line compounds. No appreciable solid solubility of holmium in nickel or of nickel in holmium was observed. Ho 3Ni 2 exists in two structural modifications depending on the temperature. HoNi and HoNi 5 melt congruently at 1060 and 1370°C respectively. There are seven peritectic reactions and three eutectic reactions in this system.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
