Relationship Between the Liquidus Surface and Structures of Zr-Cu-Al Bulk Amorphous Alloys

摘要

By using a Al_2O_3 cell coated with Si_3N_4, the melting point (T_m) of the cast bulk amorphous samples were measured an DTA curves cooled from the molten state. Based on the T_m data, the partial liquidus surface of Zr-Cu-Al ternary allays was determined. A ternary eutectic point is located around Zr_(50)Cu_(40)Al_(10), and law melting temperatures of less than 1273 K were obtained in a wide compositional area of 40-70 at percent Zr, 30-60 at percent Cu and 0-10 at percent Al. Bulk amorphous alloys in Zr-Cu-Al ternary system were produced by an arc-casting method and the highest tensile strength of 2000 MPa was observed in Zr_(50)Cu_(40)Al_(10).