High temperature oxidation behavior of laser clad NiCrAlY layer

Iwamoto, Hiro; Sumikawa, Takashi; Nishida, Katsumi; Asano, T.; Nishida, Minoru; Araki, Takao

doi:10.1016/s0921-5093(97)00499-1

Cited by 39 publications

(16 citation statements)

References 17 publications

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“…K 1 expresses the oxidation behaviour in terms of the alumina thickness and K 2 in terms of oxygen gain per unit coating surface (the density of pure alumina used in the calculation of K 2 was, in accordance with [12], 3.86 g cm − 3 ). The parabolic rate constants obtained in this study present values very close to those for the bulk material (pure alumina) [13,14]. …”

Section: Resultssupporting

confidence: 79%

High temperature oxidation of HFPD thermal-sprayed MCrAlY coatings

Belzunce

Higuera

Poveda

2001

Materials Science and Engineering: A

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NiCrAlY and CoNiCrAlY powders were thermal-sprayed using the high frequency pulse detonation method (HFPD) onto AISI 310 austenitic stainless steel samples in order to obtain dense, adherent high temperature oxidation resistant coatings. The cyclic oxidation behaviour in air of both types of coatings was determined at a maximum temperature of 1273 K. The porosity, internal oxidation (after the first 8-h oxidation cycle), hardness, coating thickness and substrate-coating adherence were not significantly modified by the high temperature oxidation cycles. The surface phase composition was evaluated throughout the tests using X-ray diffraction and scanning electron microscope techniques revealing the formation of a continuous and highly protective alumina layer. The oxidation kinetics of both coatings can be characterized by parabolic rate constants, which are very similar to those of pure alumina.

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Section: Resultssupporting

confidence: 79%

High temperature oxidation of HFPD thermal-sprayed MCrAlY coatings

Belzunce

Higuera

Poveda

2001

Materials Science and Engineering: A

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“…6a the oxide on the surface grew into a spherical shape, although some of oxides in needle morphology were also observed locally. It has been reported that the θ-Al 2 O 3 usually grows in a needle-like (or whisker-like, blade-like) morphology and α-Al 2 O 3 grows in a dense equiaxed structure [25,26]. Therefore, it can be considered that the oxide in the spherical shape appeared on the coating surface is α-Al 2 O 3 oxide.…”

Section: Microstructure Of the Coatingmentioning

confidence: 99%

Study of oxidation behavior of nanostructured NiCrAlY bond coatings deposited by cold spraying

Zhang

Lui

2008

Surface and Coatings Technology

113

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“…This is a considerable advantage of the ESD process in obtaining a homogenous and refined coating. Microstructure refinement and homogeneity of MCrAlX coatings have been previously made by laser or electron beam treatment [18][19][20]. It has been found that the oxidation resistance of MCrAlX alloys was improved by these welding processes, a beneficial effect which is attributed to excellent bonding of the coating to the substrate and to the fact that the coating was fully dense.…”

Section: Discussionmentioning

confidence: 99%