A percolation theory for designing corrosion-resistant alloys

Xie, Yusi; Artymowicz, D.; Lopes, Pietro Papa; Aiello, Ashlee; Wang, Duo; Hart, James L.; Anber, Elaf A.; Taheri, Mitra L.; Zhuang, Houlong; Newman, R.C.; Sieradzki, Karl

doi:10.1038/s41563-021-00920-9

Cited by 69 publications

(54 citation statements)

References 28 publications

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“…Recently, Sieradzki and co‐workers provided a “percolation theory” to explain such phenomenon and presented more experimental details in iron–chromium and nickel–chromium binary alloys. [ 59 ] Nevertheless, the large grains in the inner matrix of ZTFC (layer 5) crystallized well, as convinced by the fast Fourier transfer (FFT) pattern shown in the inset of Figure 5d,e.…”

Section: Resultsmentioning

confidence: 74%

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)₂ Alloy

Lin

Yan

et al. 2022

Advanced Materials

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Zero thermal expansion (ZTE) alloys as dimensionally stable materials are usually challenged by harsh environmental erosion, since ZTE and corrosion resistance are generally mutually exclusive. Here, a high‐performance alloy, Zr0.8Ta0.2Fe1.7Co0.3, is reported, that shows isotropic ZTE behavior (αl = 0.21(2) × 10−6 K−1) in a wide temperature range of 5–360 K, high corrosion resistance in a seawater‐like solution compared with classic Invar and stainless Invar, and excellent cyclic thermal and structural stabilities. Such stabilities are attributed to the cubic symmetry, the controllable magnetic order, and the spontaneously formed passive film with Ta and Zr chemical modifications. The results are evidenced by X‐ray/neutron diffraction, microscopy, spectroscopy, and electrochemistry investigations. Such multiple stabilities have the potential to broaden the robust applications of ZTE alloys, especially in marine services.

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Section: Resultsmentioning

confidence: 74%

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)₂ Alloy

Lin

Yan

et al. 2022

Advanced Materials

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“…Different from the nucleation period, growth of passive film mainly depends on both clustering and diffusion of the anticorrosion elements, such as Cr 29,30 . The formation of passive film on the CoCrFeMnNi HEA has been reported to be governed by defects for effective ion transport 31 .…”

Section: Discussionmentioning

confidence: 99%

3D printed N-doped CoCrFeNi high entropy alloy with more than doubled corrosion resistance in dilute sulphuric acid

Zhou

Chen

et al. 2023

npj Mater Degrad

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The traditional approaches for improving corrosion resistance of alloys typically lead to the sacrifice of mechanical properties because the microstructures needed for improving corrosion resistance often contradict those for high strength. Here we demonstrate that selected laser melting (SLM), a net-shape additive manufacture technique, can maintain good mechanical properties while double the corrosion-resistance of a N-doped CoCrFeNi HEA. The SLM processed sample possesses a heterogeneous microstructure with 3D dislocation cells inside each grain. The SLM-induced 3D dislocation cell structure can provide effective diffusion paths to significantly promote Cr outward segregation, forming a thick protective Cr oxide layer, which renders excellent corrosion resistance. Furthermore, Cr segregation along cell boundaries provides numerous sites for nucleation of oxides, and stabilizes the cell structure for good mechanical properties. The strategy discovered here may also be applied to other HEAs with multiple strengthening mechanisms.

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“…This approach omits key aspects of the oxidation problem at the nanoscale. Initial (≤10 −7 s) and kinetically-controlled film growth can be described by decoupled kinetic models, such as percolation and diffusion models [1][2][3], however, these rely often on experimentally-derived parameters that are challenging to extract. On the other hand, thermodynamic phase diagrams have demonstrated success as predictive tools for understanding scale growth [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic descriptors to predict oxide formation in aqueous solutions

Walters,

Wang,

Rondinelli

2022

Preprint

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We formulate the maximum driving force (MDF) parameter as a descriptor to capture the thermodynamic stability of aqueous surface scale creation over a range of environmental conditions. We use formation free energies, ∆ f Gs, sourced from high-throughput density functional theory (DFT) calculations and experimental databases to compute the maximum driving force for a wide variety of materials, including simple oxides, intermetallics, and alloys of varying compositions. We show how to use the MDF to describe trends in aqueous corrosion of nickel thin films determined from experimental linear-sweep-voltometry data. We also show how to account for subsurface oxidation behavior using depth-dependent effective chemical potentials. We anticipate this approach will increase overall understanding of oxide formation on chemically complex multielement alloys, where competing oxide phases can form during transient aqueous corrosion.

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A percolation theory for designing corrosion-resistant alloys

Cited by 69 publications

References 28 publications

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)₂ Alloy

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)₂ Alloy

3D printed N-doped CoCrFeNi high entropy alloy with more than doubled corrosion resistance in dilute sulphuric acid

Thermodynamic descriptors to predict oxide formation in aqueous solutions

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A percolation theory for designing corrosion-resistant alloys

Cited by 69 publications

References 28 publications

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)2 Alloy

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)2 Alloy

3D printed N-doped CoCrFeNi high entropy alloy with more than doubled corrosion resistance in dilute sulphuric acid

Thermodynamic descriptors to predict oxide formation in aqueous solutions

Contact Info

Product

Resources

About

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)₂ Alloy

A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)₂ Alloy