Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/4315
Título: | The influence of small additions of Ni, Ti and C on the oxidation behaviour of sputtered tungsten coatings | Autor: | Louro, C. Cavaleiro, A. |
Palavras-chave: | Oxidation; Sputtering; Coatings; Tungsten | Data: | 1999 | Citação: | Journal of Materials Processing Technology. 92-93:(1999) 162-168 | Resumo: | The oxidation rate of sputtered tungsten-based coatings, oxidised in air at temperatures of 600°C-800°C can be influenced significantly by the addition of small amounts of nickel, titanium and carbon. The presence of carbon does not change the type of oxide phases formed during the oxidation of sputtered W coatings: there are two oxide layers, the inner being a compact sub-oxide of WOx type and the outer being a typical porous WO3 phases. The addition of Ni and Ti, however gives rise, in addition to WOx and WO3, of other type of oxides, such as NiWO4 and TiO2, respectively. The oxidation process is very complex, with different fluxes of species to be considered: the oxygen ion flux from the exterior to the interior, and Ni and Fe diffusing towards the exterior. At the annealing temperature of 800°C, in the cases of W-C-Ni films, a FeWO4 layer is detected beneath the mixed oxide. The greatest oxidation resistance is obtained for W-C-Ti, followed by W-C-Ni and finally W-C. | URI: | https://hdl.handle.net/10316/4315 | DOI: | 10.1016/S0924-0136(99)00222-8 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Eng.Mecânica - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
file26d18ec17e714c9b8b5cd8394c8b2e71.pdf | 752.46 kB | Adobe PDF | Ver/Abrir |
Citações SCOPUSTM
10
Visto em 7/out/2024
Citações WEB OF SCIENCETM
9
Visto em 2/out/2024
Visualizações de página 50
433
Visto em 15/out/2024
Downloads 50
756
Visto em 15/out/2024
Google ScholarTM
Verificar
Altmetric
Altmetric
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.