Mechanical, electrical properties and microstructures of combinatorial Ni-Mo-W alloy films

Kim, Kangsan; Park, Sanghun; Kim, Taeyeop; Park, Yuhyun; Sim, Gi-Dong; Lee, Dongwoo

doi:10.1016/j.jallcom.2022.165808

Cited by 18 publications

(3 citation statements)

References 63 publications

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“…Nickel-molybdenum-tungsten (Ni-Mo-W) films fabricated by sputter deposition displayed an unprecedented tensile strength (∼3 GPa) and microstructural stability. Followup studies attempted to verify the potential of Ni-Mo-W thin film as a structural material by preparing the sample at a much lower deposition rate, 29,30 measuring the thermal expansion coefficient 31 and electrical resistance, 32 assessing the thermal stability with an in situ transmission electron microscopy (TEM) study, 33 and fabricating micro-cantilever beams. 34 For a complete reliability evaluation, the fatigue resistance of Ni-Mo-W thin films must be understood.…”

Section: Introductionmentioning

confidence: 99%

Fatigue behavior of freestanding nickel–molybdenum–tungsten thin films with high-density planar faults

Park,

Choi

et al. 2024

Nanoscale

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Section: Introductionmentioning

confidence: 99%

Fatigue behavior of freestanding nickel–molybdenum–tungsten thin films with high-density planar faults

Park,

Choi

et al. 2024

Nanoscale

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“…In this work, combinatorial synthesis of nanostructured W-Ta, W-Re, and W-Re-Ta thin films was carried out to produce specimens with composition spreads. We then employed combinatorial and high-throughput experiments (HTEs) to investigate irradiation damages of the materials library [31][32][33][34]. The irradiation damage behaviors with respect to composition and microstructure were characterized by mechanical, thermal, and structural properties of the combinatorial samples.…”

Section: Introductionmentioning

confidence: 99%

Combinatorial Discovery of Irradiation Damage Tolerant Nano-structured W-based alloys

Jo¹,

Park²,

You³

et al. 2022

Preprint

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One of the challenges in fusion reactors is the discovery of plasma facing materials capable of withstanding extreme conditions, such as radiation damage and high heat flux. Development of fusion materials can be a daunting task since vast combinations of microstructures and compositions need to be explored, each of which requires trial-and-error based irradiation experiments and materials characterizations. Here, we utilize combinatorial experiments that allow rapid and systematic characterizations of composition-microstructure dependent irradiation damage behaviors of nanostructured tungsten alloys. The combinatorial materials library of W-Re-Ta alloys was synthesized, followed by the high-throughput experiments for probing irradiation damages to the mechanical, thermal, and structural properties of the alloys. This highly efficient technique allows rapid identification of composition ranges with excellent damage tolerance. We find that the distribution of implanted He clusters can be significantly altered by the addition of Ta and Re, which play a critical role in determining property changes upon irradiation.

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“…To overcome these shortcomings of Ni-W thin films, the recent sputtering of Ni-Mo-W ternary films with no more than 6 at.% W additions, showing an extraordinary balance of strength and toughness, underpinned by the formation of the growth of nano-twins [20,21]. Due to this suite of properties, Ni-Mo-W films possess a lower and tailorable coefficient of thermal expansion [22] and are compatible with the wafer-level manufacturability of metal MEMS devices [23]. In addition, recent research focuses on the use of the ternary formulation of the Ni-Mo-W catalyst with improved hydrogenation functions [24,25].…”

Section: Introductionmentioning

confidence: 99%

Individual Layer Thickness Dependence of Microstructure and Mechanical Properties of Magnetron Sputtering Mo-W-Doped Ni/Ni3Al Multilayers

Zhang

Shao²,

Dai

et al. 2022

Coatings

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The mechanical properties of nanocrystalline pure Ni films are degraded due to grain coarsening with exposure for a long time in ambient. In order to further improve the mechanical properties of Ni-based thin films, as-sputtered Mo-W co-doped Ni/Ni3Al multilayered structures were constructed. When the individual layer thickness (h) is lower than 40 nm, both the average grain sizes and the crystallinity degrees are degraded, showing a tendency for the formation of the amorphous phase. With h = 40 nm, nano-twins were observed as (111) twining interfaces for the multilayers due to the reduction of the stacking fault energy by the co-doping of Mo-W, whereas the nucleation and growth of the nano-twins were limited, without observations for the Mo-W co-doped Ni/Ni3Al multilayer with h = 10 nm. The hardness of the multilayers was enhanced, and the elastic modulus was reduced at a lower h, owing to the grain refinements and layer interface barriers for strengthening, and the existence of the amorphous phase with the inferior modulus, respectively. The resistance against the fracture was enhanced due to toughening by the lamellar structure for the Mo-W doped Ni/Ni3Al multilayer at h ≤ 40 nm. Comprehensively, the Mo-W-doped Ni/Ni3Al multilayer with 10 nm displays a superior mechanical performance.

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Mechanical, electrical properties and microstructures of combinatorial Ni-Mo-W alloy films

Cited by 18 publications

References 63 publications

Fatigue behavior of freestanding nickel–molybdenum–tungsten thin films with high-density planar faults

Fatigue behavior of freestanding nickel–molybdenum–tungsten thin films with high-density planar faults

Combinatorial Discovery of Irradiation Damage Tolerant Nano-structured W-based alloys

Individual Layer Thickness Dependence of Microstructure and Mechanical Properties of Magnetron Sputtering Mo-W-Doped Ni/Ni3Al Multilayers

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