Opracowanie metod wprowadzania nanorurek węglowych do jeziorka ciekłego metalu
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Abstract
Niezwykłe właściwości nanorurek węglowych stwarzają perspektywy do ich wykorzystania w wielu dziedzinach nauki i techniki. W obszarze inżynierii materiałowej główne badania z udziałem nanorurek węglowych obejmują wytwarzanie materiałów kompozytowych. Kompozyty o osnowie metalowej wzmacniane nanorurkami węglowymi MM-CNT (ang. metal matrix carbon nanotube composites) mogą być projektowane w celu uzyskania materiału o małej gęstości, wysokiej wytrzymałości, niskim współczynniku rozszerzalności cieplnej oraz wysokiej przewodności cieplnej. Lekkie i wytrzymałe materiały konstrukcyjne stanowią podstawę przyszłych, efektywnych energetycznie, a tym samym ekologicznych i ekonomicznych rozwiązań technologicznych przemysłu lotniczego i samochodowego. W artykule przedstawiono przebieg badań nad opracowaniem metod wprowadzania nanorurek węglowych do jeziorka ciekłego metalu w celu wytworzenia eksperymentalnych materiałów kompozytowych MM-CNT oraz określenia wpływu CNTs na strukturę i właściwości stali. Zaproponowane procedury, wykorzystujące techniki spawalnicze, stanowią nową, obok odlewania i infiltracji porowatego performu, metodę wytwarzania MM-CNT w stanie ciekłym. Przeprowadzona analiza struktury i właściwości uzyskanych obszarów przetopień stali austenitycznej potwierdza zasadność dalszych badań z wykorzystaniem nanorurek węglowych oraz innych metali i stopów o niskiej temperaturze topnienia.
Development of methods of carbon nanotubes input to weld pool
Unusual properties of carbon nanotubes offer prospects for their use in many fields of science and technology. In the materials engineering major study involving carbon nanotubes includes production of composite materials. Metal matrix composites reinforced with carbon nanotubes MM-CNT (matrix metal carbon nanotube composites) can be designed in order to obtain a material with low density, high strength, low coefficient of ther mal expansion and high thermal conductivity. Lightweight and high-resistant construction materials are the basis for future energy efficient and thus the ecological and economical technology for aerospace and automotive industry. The paper presents the research on the development of carbon nanotubes input methods to weld pool to form an experimental MM-CNT composite, and determine the impact of CNTs on the structure and properties of steel. The proposed procedures with the use of welding techniques are a new, next to casting and infiltration of a porous perform, methods of producing MM-CNT in a liquid state. The analysis of the structure and properties of the weld penetration regions of austenitic stainless steel confirms the further research validity of using carbon nanotubes and other metals and alloys with low melting point.
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