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High temperature properties of the Cr-Nb-Al-N coatings with increasing Al contents
Li, W. Z.; Polcar, T.; Evaristo, M.; Cavaleiro, A.Cr-Nb-Al-N coatings with Al content from 0 to 12 at.% were deposited by d.c. reactive magnetron sputtering. The coatings were annealed in protective atmosphere at 800 and 900 °C for 1 h and exposed to air at 800, 900 and 1200 °C for different times. The chemical composition, structure, microstructure, hardness and adhesive/cohesive strength of the coatings, in as-deposited and annealed conditions, were investig...
Carbon-based coatings doped by copper: Tribological and mechanical behavior in ...
Balestra, R. M.; Castro, A. M. G.; Evaristo, M.; Escudeiro, A.; Mutafov, Petr; Polcar, T.; Cavaleiro, A.We deposited C-based films doped with Cu and tested their sliding properties in olive oil as environment-friendly lubricant, which can be used in many mechanical systems, particularly in agriculture engineering. The coatings were deposited in a four unbalanced magnetron sputtering device combining C and C/Cu targets; argon (hydrogen-free films) and Ar/CH4 (hydrogenated films) atmospheres were used. Cu content o...
Aspectos morfofisiológicos e conteúdo de óleo essencial de plantas de alfazema-...
Pinto,José Eduardo BP; Cardoso,Júlio César W; Castro,Evaristo M de; Bertolucci,Suzan Kelly V; Melo,Lucas A de; Dousseau,SaraMudanças nas características anatômicas e fisiológicas e na produção de óleo essencial de plantas medicinais sob influência de diferentes condições de radiação têm sido evidenciadas. O objetivo deste trabalho foi caracterizar essas variações em plantas de alfazema-do-Brasil (Aloysia gratissima [Gilles & Hook.] Tronc.) Verbenaceae, crescidas a pleno sol e com 40 e 80% de redução da radiação solar incidente. ...
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