Enhanced Mechanical, Thermal and Electrical Properties of High‐Entropy HfMoNbTaTiVWZr Thin Film Metallic Glass and its Nitrides

Abstract

Amorphous metallic alloys or bulk metallic glasses (BMGs) are non-crystalline metals that lack long-range order. The disordered atomic structure and absence of grain boundaries in BMGs results in giving them good soft-magnetic properties and excellent mechanical properties with high elastic limits and specific strength, as well as highly corrosion and wear-resistant properties. [1] Different BMGs based on Zr, Cu, Ti, Fe, Pd, Pt, and Au systems have been developed thus far. [1] However, one of the major drawbacks of BMGs is their low ductility. The concept of BMGs has been explored recently in developing thin film metallic glasses (TFMG) from vapor-to-solid phase deposition using binary or ternary compositions. [2,3] Furthermore, the composition window for achieving amorphous films is much wider than that achieved from BMGs using rapid casting as the resulting material from vapor-to-solid deposition is farther from equilibrium than the material produced by the liquid-to-solid casting process. [4] In addition to high strength, the resulting TFMG brings improved ductility and good formability. [4] Such thin films are useful in applications, such as biomedical use, [5] increasing fatigue properties of commercial blades, [6] microelectronics and optoelectronics, [7] wear resistance [8] and microelectro-mechanical system (MEMS) devices. [9]

Annealing Effect on Mechanical and Tribological Behaviors of Nanoscale Mechanics of Zr60Cu25Al5Ag5Ni5 Thin-Layer Metallic Glasses for Engineering Materials Applications

“…These local compositional fluctuations or random arrangements of atoms influence the plasticity of MGs, without a high loss of strength or hardness. The arrangement of atoms can affect atomic transport, hardness, elastic modulus, magnetic, wear rate, friction, and electrochemical properties. , Annealing results for chemical reordering leads to phase transition of MG, depending on the interatomic distance of atoms and improved plasticity of MG. Short interatomic distance between transition metals in the alloy composition may have existed only in the metallic glass . Representative indentations on the BMG and TLMG of load–displacement curves are shown in Figure c.…”

“…The arrangement of atoms can affect atomic transport, hardness, elastic modulus, magnetic, wear rate, friction, and electrochemical properties. 13 , 33 Annealing results for chemical reordering leads to phase transition of MG, depending on the interatomic distance of atoms and improved plasticity of MG. Short interatomic distance between transition metals in the alloy composition may have existed only in the metallic glass. 34 Representative indentations on the BMG and TLMG of load–displacement curves are shown in Figure 1 c. The surface indentation profiles show that the indented depth of TLMG is shallow compared with that of BMG, indicating lower material loss and higher wear resistance.…”

Nanocrystalline (AlTiVCr)N Multi-Component Nitride Thin Films with Superior Mechanical Performance

“…However, these values are not very prominent compared with other related nitride films. The sputtering methods and parameters greatly influence the density, microstructure, and quality of thin films, which may result in different hardness and strength, such as the coating environments, target power, voltage bias, temperature of the substrate and different deposition mechanisms [ 35 , 36 , 37 , 38 , 39 , 40 ]. The existence of non-covalent bonds in our films positively contributes to the ductility but may reduce the hardness simultaneously.…”

Annealing Effect on Mechanical and Tribological behaviour of Nanoscale Mechanics of Thin Layer Metallic Glasses for Engineering Material Applications

“…Arrangement of atoms can affect atomic transport, hardness, elastic modulus, magnetic, wear rate, friction and electrochemical properties. 7,24 Annealing results for chemical reordering leads to phase transition of MG, depending on the interatomic distance of atoms and improved plasticity of MG. Short interatomic distance between transition metals in the alloy composition may be existed only in the metallic glass. 25 Representative indentations on the BMG and TLMG of load-displacement curves are shown in Fig.…”