Release Time:2019-03-13  Hits:

Indexed by: Journal Article

Date of Publication: 2016-07-01

Journal: CHINA FOUNDRY

Included Journals: ISTIC、SCIE

Volume: 13

Issue: 4

Page Number: 262-268

ISSN: 1672-6421

Key Words: copper alloys; fibrous structure; rapid solidification; mechanical properties; electrical conductivity

Abstract: Cu90Zr10-xAlx (x=1, 3, 5, 7, 9; at.%) alloy rods were synthesized based on rapid solidification method. The structure, distribution of elements, mechanical properties and electrical conductivity of the Cu-based alloy samples were studied using X-ray diffraction (XRD), scanning electron microscope (SEM), electro-probe micro-analyzer (EPMA), uniaxial compression test and four-probe technique. The as-cast Cu90Zr10-xAlx (x=1, 3, 5; at.%) alloy rods with a diameter of 2 mm exhibit good mechanical properties and electrical conductivity, i.e., high compressive yield strength of 812-1513 MPa, Young's modulus of 52-85 GPa, Vickers hardness of 250-420 and electrical conductivity of 11.1%-12.6% IACS (International Annealed Copper Standard). The composite microstructure composed of high density fibrous duplex structure (Cu5Zr and alpha-Cu phases) is thought to be the origin of the high strength.