Preparation of Ni Aluminide/Ni Bilayer Coating on Nb–W Alloys by Molten Salt Electrodeposition and Oxidation Resistance

Sato, Naka; Fuji, Masayoshi; Naoya, Kohiruimaki; Fukumoto, Masahiro; Hara, Mitsuhiro

doi:10.1007/s11085-015-9574-z

Cited by 4 publications

(1 citation statement)

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“…The results of Yao's study showed that the microcrystalline beta-NiAl coating exhibited good oxidation resistance by forming exclusive alpha-A1 2 O 3 scales during cyclic oxidation tests at 1373 K in air [6]. In Sato's study [9], coatings consisting of a Ni aluminide/Ni bilayer on Nb-W and Nb-W-Mo alloys were prepared by electro deposition and the result showed that the coating specimen with a thick Ni layer had a high oxidation resistance, as a surface layer consisting of NiAl was formed after the oxidation test. In Wang's study [10], an outermost coating with single-phase Ni 2 Al 3 was obtained on a copper surface by electrodepositing nickel, followed by slurry pack aluminizing, and the result showed that the NiAl coating had excellent high-temperature oxidation resistance when the oxidation time was 250 h.…”

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confidence: 97%

High-Temperature Oxidation Resistance of NiAl Intermetallic Formed In Situ by Thermal Spraying

Jia

Li³

et al. 2018

Coatings

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An Al/Ni composite coating was deposited on the surface of a pure Ti substrate by arc spray technology and plasma spray technology. In order to enable the in-situ reaction between the Al/Ni composite coating and the specimen, they were heated under different conditions. In addition, oxidation testing was conducted to test the oxidation-resistant property of the coating. The phase transition regulation of the coating after heating, the influence of heating at different temperatures and time on the reaction depth, and the correlated theory of the in-situ formation of the NiAl intermetallic compounds were studied and analyzed. The results showed that after the heat treatment, a ragged wave-like morphology was exhibited in the diffusion front of Al, and a small amount of the Ni in the diffusion region did not participate in the reaction. The growth of the NiAl intermetallic layer in the diffusion region of the Al/Ni/Ti specimen was obviously slower compared with the Al/Ni specimen.

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