Influence of high frequency and moderate energy pulses on DLC deposition onto metallic substrates by magnetron sputtering technique
Título del documento: Influence of high frequency and moderate energy pulses on DLC deposition onto metallic substrates by magnetron sputtering technique
Revue: Brazilian journal of physics
Base de datos: PERIÓDICA
Número de sistema: 000403522
ISSN: 0103-9733
Autores: 1
1
1
2
Instituciones: 1Instituto Nacional de Pesquisas Espaciais, Sao Jose dos Campos, Sao Paulo. Brasil
2Industrial Technology Center of Nagasaki, Omura, Nagasaki. Japón
Año:
Periodo: Jun
Volumen: 39
Número: 2
Paginación: 331-336
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés The deposition of Diamond-like carbon (DLC) films brings excellent mechanical, chemical, optical and electronic properties to a large range of materials. However, a problem to be overcome is its poor adhesion on metallic substrates. Usually, a silicon layer must be deposited on the surface of metals previous to DLC film deposition. In fact, in our experiments using conventional Magnetron Sputtering (MS) technique for deposition of DLC film on metal surfaces (AISI 304 stainless steel, Al 2024, Ti-6Al-4V), the silicon interlayer was crucial to avoid delamination. However, a combined process using MS and high frequency and moderate energy pulses (2.5kV/6µs/1.25 kHz), was successful to grow DLC film without the interlayer. Additionally, by monitoring the stress and the thickness in silicon samples after the processes, it was possible to correlate the conditions of operation with such characteristics. Stress measurements carried out by a profilometer and calculated by Stoney's equation varied from 2 GPa to 10.5 GPa depending on the conditions of operation of the process (pressure, distance source-substrate, frequency, length and intensity of the pulse). The thickness, the composition, the structure and the morphology of DLC coatings deposited in such metallic surfaces were obtained. Tribological and corrosion tests were also performed
Disciplinas: Ingeniería
Palabras clave: Ingeniería de materiales,
Películas delgadas,
Carbono como diamante,
Diamante
Keyword: Engineering,
Materials engineering,
Thin films,
Diamond-like carbon,
Diamond
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