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Titolo:
Laser remelting of plasma sprayed NiCrAlY and NiCrAlY-Al2O3 coatings
Autore:
Wu, YN; Zhang, G; Zhang, BC; Feng, ZC; Liang, Y; Liu, FJ;
Indirizzi:
Chinese Acad Sci, Inst Met Res, New Delhi 110016, India Chinese Acad Sci New Delhi India 110016 Met Res, New Delhi 110016, India Beijing Aeronaut Mfg Technol Res Inst, Key Lab High Energy Dens Beam Proc Technol, Beijing 100024, Peoples R China Beijing Aeronaut Mfg Technol Res Inst Beijing Peoples R China 100024 ina
Titolo Testata:
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
fascicolo: 5, volume: 17, anno: 2001,
pagine: 525 - 528
SICI:
1005-0302(200109)17:5<525:LROPSN>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPERALLOY; BEHAVIOR; ALLOY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Wu, YN Chinese Acad Sci, Inst Met Res, New Delhi 110016, India Chinese Acad Sci New Delhi India 110016 , New Delhi 110016, India
Citazione:
Y.N. Wu et al., "Laser remelting of plasma sprayed NiCrAlY and NiCrAlY-Al2O3 coatings", J MAT SCI T, 17(5), 2001, pp. 525-528

Abstract

Two types of plasma sprayed coatings (NiCrAlY and NiCrAlY-Al2O3) were remelted by a 5 kW cw CO2 laser. With increasing laser power and decreasing traverse speed in the ranges of 200 similar to 700 W and 5 similar to 30 mm/s respectively, the melted track grew in width and depth. In the optimum range of laser parameters, a homogeneous remelted layer without voids, cavities, unmelted particles and microcracks was formed. On the surface of remeltedlayers, Al2O3 and YAlO3 were detected. As a result of isothermal oxidationtests, weight gains of laser remelted coatings were obviously lower than that only plasma sprayed, especially laser remelted NiCrAlY-Al2O3 coatings. The effects of laser remelting and incorporation of Al2O3 second phase in NiCrAlY matrix on high temperature oxidation resistance were discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 19:31:55