Effect of Mo addition on structures and properties of FeCoNiCrMn high entropy alloy film by direct current magnetron sputtering

Effect of Mo Content on the Microstructure and Mechanical Properties of Cocrfenimox Hea Coatings Deposited by High Power Impulse Magnetron Sputtering

“…Moreover, when the Mo content exceeds 9.2 at.%, two additional diffraction peaks appear at 2θ values of 41.1 • and 90 • , which are consistent with the (110) and ( 220) planes of a Mo-rich body-centered cubic (BCC) structure. This result is in line with the findings of Zhao et al [52], who observed a transition in the phase structure of FeCo-NiCrMnMo x films from a single FCC phase to a mixture of FCC and BCC phases upon Mo addition. Similarly, the coexistence of FCC and BCC phases has also been reported by Boakye et al [53] in CoCrFeNiMo x HEA coatings.…”

“…Compared to bulk Mocontaining HEA alloys, the films produced in this work demonstrate a similar trend of increasing hardness with increasing Mo content [20,84], ranging from 9.6 GPa for the Mo0 film to 11.5 GPa for the Mo20 film, exhibiting significantly higher hardness values. It can be attributed to the fine-grained structure and the large fraction of planar defects found in the films [74,75], while the observed increase in hardness with increasing Mo content is likely related to the combined effect of solid solution strengthening, formation of the BCC phase, grain refinement, and the presence of a nanotwinned structure [52]. Firstly, the atomic size difference between Mo and the other constituents results in local lattice distortion due to Mo incorporation, as evidenced by the detected peak shifting in the XRD patterns (Fig.…”

Progress on New Preparation Methods, Microstructures, and Protective Properties of High-Entropy Alloy Coatings

“…The addition of the element of Mo could promote the transformation from FCC phase to σ phase, thus improving the mechanical properties of the coating. Zhao et al [59] added Mo elements to DC-magnetron-sputtered FeCoNiCrMn HEA, and the coating density increased and the phase structure gradually changed from a single FCC phase to a mixed phase of FCC + BCC phase. At the same time, the grain size decreased and the lattice constant increased.…”

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Plasma Cladded CoCrFeNiMn Coatings on Compacted Graphite Iron

“…Currently, the surface modification and repair technology represent the most popular preparation process for high-entropy alloy coatings. It can be categorized into laser cladding technology [12,13], plasma cladding [14,15], thermal spraying [16], cold spraying [17], electron-beam sputtering technology [18], electrochemical deposition technology [19], etc. As compared to the commonly used methods, plasma cladding technology has the subsequent advantage characteristics including high powder deposition rate, low dilution rate, high cladding efficiency, wide selection of cladding materials and sensible method controllability so that it was preferred to prepare HEA coatings.…”