High temperature behaviour of NiCrAlY coatings made by laser cladding

Partes, Knut; Giolli, C.; Borgioli, Francesca; Bardi, Ugo; Seefeld, Thomas; Vollertsen, Frank

doi:10.1016/j.surfcoat.2007.09.010

Cited by 54 publications

(27 citation statements)

References 7 publications

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“…As an alternative, laser cladding is used in this work aiming to obtain fully dense layers metallurgically bonded to the substrate. Other authors have already investigated the characteristics of some MCrAlY coatings by laser cladding on Ni-based superalloy substrates[C. Bezencon et al(2003), K. Partes et al(2008), F. Vollertsen et al(2005), R. Vila and S. Costa Santos(2011)]. In the present study, coating deposition is performed in austenitic steel substrates.…”

Section: Introductionmentioning

confidence: 88%

Laser Cladding of MCrAlY Coatings on Stainless Steel

et al. 2014

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MCrAlY alloys (where M stands for Ni,Co or both) are commonly used as overlay protective coatings in gas turbine engine components against high temperature oxidation and corrosion. The protective effect of these alloys is due to the formation of a continuous thermally stable oxide layer on the coating surface. In this work several types of MCrAlY alloys, differing in their elemental composition, have been deposited on austenitic stainless steel by means of laser cladding. The microstructure of the coatings have been characterized by SEM-EDS and XRD. As expected, elemental composition compatible with Ni/ ' Ni3Al, Ni/ -NiAl or γCo/β-(Co,Ni)Al phases are observed in hypoeutectic or hypereutectic microstructures depending on the alloy composition. The high temperature oxidation behavior of the coatings was evaluated by air furnace oxidation tests at 1100ºC for 200 h. The oxidized surface of the samples was examined by SEM-EDS and the oxides present identified by theoretical stoichiometric calculations. Results indicate the formation of a uniform Al 3 O 2 protective oxide scale with NiO, CoO, Y 2 O 3 /YAlO 3 and Cr 2 O 3 oxide inclusions.

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Section: Introductionmentioning

confidence: 88%

Laser Cladding of MCrAlY Coatings on Stainless Steel

et al. 2014

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“…Magnetic properties were measured by using a vibrating sample magnetometer (VSM) and Kerr tester at a maximum field of 15 kOe. The composition of TbFeCo was determined by energy-dispersive X-ray fluorescent analysis (EDAX Eagle-III uProbe, USA) with EDAX-ZAF Quantification (Standardlesss) system [18][19][20][21]. Varying estimates of the major elements is better than ±5% relative, in the best case, the analysis is capable of a 2% relative error.…”

Section: Methodsmentioning

confidence: 99%

“…Varying estimates of the major elements is better than ±5% relative, in the best case, the analysis is capable of a 2% relative error. The error in the quantitative analysis by EDAX is summarized in Table 1 as indicated by the microprobe system manufacturer [21,22].…”

Section: Methodsmentioning

confidence: 99%

Preparation and magnetic properties of TbFeCo on the porous alumina templates

Bing

Cheng

et al. 2008

Materials Science and Engineering: B

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“…Thus the mount of cracks is decreased [13,14]. However, this kind of preheating has some drawbacks such as low efficiency and heat damage to important components [15][16][17]. Therefore this method is not suitable for repair of large and precise parts.…”

Section: Introductionmentioning

confidence: 99%