4 research outputs found
Surface conditions of aluminum matrix composites after the electrical discharge machining
W artykule przedstawiono wyniki bada艅 struktury stereometrycznej po obr贸bce elektroerozyjnej (WEDM) osnowy z Al20Si1Mg i na jej bazie utworzonych kompozyt贸w umacnianych cz膮stkami ceramicznymi Al2O3, SiC lub Si3N4 o zawarto艣ci 5% obj臋to艣ciowo. Osnowa i kompozyty wytworzone by艂y metodami metalurgii proszkowej P/M i obrabiane WEDM przy dw贸ch nastawach: E2 i E7. Przedstawiono stereometryczne obrazy powierzchni pr贸bek po WEDM oraz liniowe wykresy chropowato艣ci. Uzyskane wyniki liczbowe szeregu parametr贸w, charakteryzuj膮cych stereometri臋 powierzchni obrobionej, pozwoli艂y na sformu艂owanie szeregu wniosk贸w i spostrze偶e艅 dotycz膮cych odmienno艣ci tej struktury w stosunku do struktur powstaj膮cych po obr贸bce WEDM metali i ich stop贸w.The results of investigation into surface texture after the WEDM process have been presented for the composites on a matrix Al20Si1Mg and reinforced by 5% volume of ceramic particles Al2O3, SiC or Si3N4. The matrix and the composites have been developed by powder metallurgy technology and they were subjected to the WEDM process for two technological regime settings E2 and E7. Stereometric images of the obtained sample surface as well as roughness profiles have been presented. The obtained digital results for a range of parameters featuring machined surface stereometry made it possible to draw numerous conclusions as to the difference of such structure compared to other structure formed after the WEDM process for other metals and their alloys
Strategies influencing energy efficiency of lighting solutions
Lighting technologies developed significantly in the last decade. New LED light sources, dedicated luminaires and improved lighting control techniques gave rise to new possibilities in improving energy efficiency of lighting solutions. The article is an overview of interior, road and exterior architectural object lighting design strategies. It also presents design considerations that directly impact lighting conditions and energy eff iciency. Practical examples of the application of basic design strategies, accompanied by the obtained energy results, are also depicted. Issues discussed in the article may be useful in researching and designing interior and road lighting, as well as f loodlighting. They can also be useful in planning and implementing strategies aimed at improving lighting conditions and energy efficiency of lighting solutions