The alloys were made by electric arc melting in the argon atmosphere using a laboratory electric arc furnace and non-consumable tungsten electrode on a copper water-cooled hearth. The ingots were 30 g in weight. Weight losses during melting were not more than 0.5% of the weight of the ingots. The initial components were 99.95% Ni, 99.98% Cr, 99.9% Hf and 99.95% Zr. As the description of the investigation into phase equilibria in the Ni-Cr-Hf system is given in the other paper presented at this Conference, we will dwell mainly on the results obtained on the Ni-Cr-Zr system and limit this presentation only to comparing them with the results obtained on a similar system. It should be noted that we will limit our presentation to the results obtained on cast alloys, i.e., in the state termed as as-received and that characteristic of using brazing consumables.
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