The effect of silicon as a reactive element for NiCrAl coating performance on hastelloy substrate

Ramandhany, Safitry; Sugiarti, Eni; Desiati, Resetiana Dwi; Martides, Erie; Junianto, Endro; Prawara, Budi; Sukarto, Agus

doi:10.1088/1757-899x/432/1/012017

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…The rapid development of the aerospace industry and mechanical engineering requires the creation of materials suitable for operation at high temperatures [12]. Nickel-based superalloys have a high thermal conductivity, high corrosion resistance, and relatively low melting point [12][13][14]. They are used in gas turbines, jets, and space technologies, where operating temperatures can reach 650-1100 • C [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Nickel-based superalloys have a high thermal conductivity, high corrosion resistance, and relatively low melting point [12][13][14]. They are used in gas turbines, jets, and space technologies, where operating temperatures can reach 650-1100 • C [12][13][14][15]. Nickel, taken individually, does not have a high elastic modulus, which determines the long-term strength of the material, but the limitations of Ni alloying have a wide range [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The solid-solution hardening of nickel by chromium and the high proportion of the γ'-phase (Ni 3 Al), when alloying it with aluminum, both provide exceptional mechanical properties for the nickel-based superalloy at elevated temperatures. The Cr and Al oxides, which can form on the surface of the details during operation, can additionally protect the nickel-based alloys from the external aggressive environments, since they are firmly bonded to the matrix and are diffusion-dense [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Assuming that the aluminum content is overestimated and moving to the right in the binary phase diagram of Ni-Al[14].…”

mentioning

confidence: 99%

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Microstructure, Phase Composition, and Mechanical Properties of Intermetallic Ni-Al-Cr Material Produced by Dual-Wire Electron-Beam Additive Manufacturing

Astafurova,

Reunova,

Zagibalova

et al. 2024

Metals

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Electron-beam additive manufacturing is one of the most promising methods for creating complex metal parts and structures. Additive manufacturing has already gained wide acceptance in the creation of various constructions from aluminum, copper, titanium, and their alloys as well as different classes of steels and other metallic materials. However, there are still many challenges associated with the additive manufacturing and post-production processing of intermetallic alloys. Thus, it is currently an urgent task for research. In this work, heat-resistant intermetallic alloys based on nickel, aluminum, and chromium were produced by dual-wire electron-beam additive manufacturing using commercial NiCr and Al wires. The microstructure, phase composition, and microhardness of the intermetallic billets are strongly dependent on the ratio of NiCr and Al wires, which have been fed during the additive growth of the material (NiCr:Al = 3:1 and NiCr:Al = 1:3). A metal-matrix composite material (Al3Ni-based intermetallide in Al-based matrix) was fabricated using the NiCr:Al = 1:3 ratio of the wires during the deposition. In tension, it fractures in a brittle manner before the plastic deformation starts, and it possesses a high microhardness of 6–10 GPa with a high dispersion of the value (the mean value is 8.7 GPa). This is associated with the complex phase composition of the material and the high fraction of a brittle Al3Ni intermetallic phase. In the material, obtained with the ratio NiCr:Al = 3:1, the ordered Ni3Al(Cr) and disordered Ni3Cr(Al) intermetallides are the dominating phases. Its microhardness turned out to be lower (4.1 GPa) than that in Al + Al3Ni-based composite, but intermetallic Ni3Al-based alloy demonstrates good mechanical properties in a high-temperature deformation regime (650 MPa, more than 10% elongation at 873 K). Microstructural studies, analysis of phase composition, and tensile mechanical properties of additively produced intermetallic materials show the perspective of dual-wire electron-beam additive manufacturing for producing intermetallic compounds for high-temperature applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Assuming that the aluminum content is overestimated and moving to the right in the binary phase diagram of Ni-Al[14].…”

mentioning

confidence: 99%

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Microstructure, Phase Composition, and Mechanical Properties of Intermetallic Ni-Al-Cr Material Produced by Dual-Wire Electron-Beam Additive Manufacturing

Astafurova,

Reunova,

Zagibalova

et al. 2024

Metals

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Microstructure and Phase Composition of Ni–Cr–Al-Based Intermetallics Obtained by a Dual-Wire Electron Beam Additive Manufacturing

Astafurova,

Zagibalova,

Astapov

et al. 2024

Russ Phys J

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Effect of Si Addition in NiCrAl Coating on Corrosion in Molten Nitrate Salt

Siripongsakul,

Kettrakul,

Kanjanaprayut

et al. 2024

Metals

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The materials used in concentrating solar power (CSP) systems are becoming of interest because of the high energy efficiency of energy storage. Molten salts can be used as both heat-storage media and heat-transfer fluid in a CSP system. In molten salts, steel alloys used in vessels and pipelines are highly vulnerable to hot corrosion. To protect steel alloys, applying a coating is an excellent strategy to extend the life of the alloy. NiCrAl coatings are well-suited for high-temperature environments. The purpose of this study was to investigate the corrosion behavior of NiCrAl with Si addition coatings on AISI304 in molten salt. NiCrAl coatings with and without Si addition were deposited using the high-velocity oxygen fuel (HVOF) technique. The corrosion test was performed using an immersion test in modified solar salt with 0.5% NaCl at 400–600 °C. Gravimetric methods evaluate the weight change for immersion tests. At 400 °C, an increased amount of weight gain due to the oxidation reaction and molten salt infiltration was observed. At 600 °C, the corrosion reaction was more dominant, and apparent oxidation was decreased; however, oxidation products NiO and sodium aluminum silicate were detected. Si addition supports the formation of the protective oxide sodium aluminum silicate, which inhibits molten salt oxidation reaction and molten salt infiltration.

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The effect of silicon as a reactive element for NiCrAl coating performance on hastelloy substrate

Cited by 3 publications

References 8 publications

Microstructure, Phase Composition, and Mechanical Properties of Intermetallic Ni-Al-Cr Material Produced by Dual-Wire Electron-Beam Additive Manufacturing

Microstructure, Phase Composition, and Mechanical Properties of Intermetallic Ni-Al-Cr Material Produced by Dual-Wire Electron-Beam Additive Manufacturing

Microstructure and Phase Composition of Ni–Cr–Al-Based Intermetallics Obtained by a Dual-Wire Electron Beam Additive Manufacturing

Effect of Si Addition in NiCrAl Coating on Corrosion in Molten Nitrate Salt

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