BULK AMORPHOUS PLATE PRODUCTION BY A CASTING PROCESS

It is expected that the discovery of new amorphous alloys with high gl ass-forming ability will enable production of bulk amorphous plates by a conventional casting process. Technological research has been carri ed out on the industrial die-casting machine 71109SV. The parameters o f hear transfer were established by experimental and computational met hods, and the relation between plate thickness and cooling rate was ob tained. For production of bulk amorphous articles, three- and four-com ponent alloys based on the Zr(Ti)-Cu system were used. A structural st udy of amorphous plates with a thickness of 0.1 to 2 mm revealed the p resence of fine inclusions of a crystalline phase less than 0.5% by vo lume. The quality of the plates was satisfactory if the impurity conte nt was less than 1 at.%. Some amorphous alloys investigated have the h ardness of hardened steel, good thermal stability and high corrosion r esistance.