Atenção
Fechar
Artigo Científico | Recobrimentos Protetores | Inglês | 10/04/2005
Autores: Clarice Terui Kunioshi, Lalgudi V. Ramanathan, Olandir Vercino Correa
Palavras-chave: composite coatings, erosion, high temperature, hvof, oxidation
Resumo: An apparatus to conduct high temperature erosion-oxidation studies up to 850 °C and with particle impact velocities up to 15 m.s-1 was designed and constructed in the Corrosion Laboratories of IPEN. The erosion-oxidation behavior of high velocity oxy fuel (HVOF) sprayed alloy and cermet coatings of Ni20Cr, WC 20Cr7Ni and Cr3C2 Ni20Cr on a steel substrate has been studied. Details of this apparatus and the erosion-oxidation behavior of these coatings are presented and discussed. The erosion-oxidation behavior of HVOF coated Cr3C2 25(Ni20Cr) was better than that of WC 20Cr7Ni, and the erosion-oxidation regimes have been identified for these coatings at particle impact velocity of 3.5 m.s-1, impact angle of 90° and temperatures in the range 500 to 850 °C.
Clique aqui para ler na íntegra
