Microstructure evolution and mechanical properties of Nb-alloyed Cu–Zr–Al–Ni large-sized metallic glass composites

Abstract

The effects of Nb on the microstructures and mechanical properties of large-sized (Cu0.47Zr0.47Al0.06)99 − xNi1Nb x ( x = 0, 0.5, 1, 2 at.-%) bulk metallic glass composites were investigated. It is verified that the liquidus temperature ( Tl) of the Nb-added alloys decreases to cause the increase of glass-forming ability (GFA). The addition of Nb adjusts the distribution and the volume fraction of B2-CuZr phase in the Cu–Zr–Al–Ni large-sized composites by changing the GFA of the alloys. The mechanical properties of the composites strongly depend on the volume fraction and distribution of B2-CuZr phase in the glassy matrix. The alloy with 0.5 at.-% Nb addition exhibits the high mechanical properties, which should be attributed to the uniform distribution and the proper volume fraction of B2-CuZr phase in the glassy matrix.

Influence of parameters on the cold spraying FeCoCrMoBCY amorphous coatings

“…Amorphous alloys have excellent anti-corrosion and anti-abrasion performances due to the absence of crystallographic imperfections, grains, grain boundaries, second-phase elements, dislocations and segregation, which is quite different from conventional crystalline alloys [1][2][3]. There are several kinds of amorphous alloys including Fe-based alloys [4][5][6][7][8][9][10][11], Cu-Zr based alloys [12][13][14] and Al-based alloys [15,16]. Among these amorphous alloy systems, Fe-based amorphous alloys have the advantages of low price, high wear resistance and high corrosion resistance.…”