from the conferences organized by TANGER Ltd.
In the work the results of the structural perfection of the cellular and dendrite single crystals with the diameter 24 mm of the Ticonal 9 alloy: 35 % Co – 14.5 % Ni – 7 % Al – 4 % Cu – 5 % Ti – Fe the rest (in wt.%) at the growing rates (R) from 0.1 to 9 mm/min with the constant temperature gradient 10 – 12 K/mm are presented. The block size decrease from 2.3 mm at R = 0.1 mm/min to 1 mm at R = 9 mm/min at the simultaneous disalignment increase from 1.8° to 7.8° accordingly was revealed. During the investigation the dependence of the working properties (magnetic parameters) of the single crystal casting samples obtained at different growing rates was determined. It is shown that the samples grown at high rates (5 ÷ 9 mm/min), i.e. the samples with the most imperfect structure have the highest magnetic properties (Hcb, Br, BHmax). Theoretical and experimental investigations carried out in the present work allowed explain these contradictions and give recommendations regarding the manufacturing conditions of single crystal castings of the Ticonal 9 magnetic alloy.
Keywords: single crystal, magnetic properties, growing rate, temperature gradient, structural perfection© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.