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Improving tribological and thermal properties of al alloy using cnts and nb nanopowder via SPS for power transmission conductor

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Transactions of Nonferrous Metals Society of China 2020年第2期30卷 333-343页

作者： Chika O.UJAH Patricia POPOOLA Olawale POPOOLA Victor AIGBODION Philip OLADIJO Department of Chemical Metallurgical and Materials EngineeringTshwane University of TechnologyPretoria 0001South Africa Department of Electrical Engineering Tshwane University of TechnologyPretoria 0001South Africa Department of Metallurgical and Materials Engineering University of NigeriaNsukka 410001Nigeria Department of Chemical Materials and Metallurgical EngineeringBotswana International University of Science and TechnologyPalapye 12345Botswana Department of Mechanical Engineering University of JohannesburgJohannesburg 2000South Africa

This study aimed at improving the tribological and thermal properties of al alloy using cnts and nb nanopowder as reinforcements and spark plasma sintering(SPS)as the fabrication *** SPS was conducted at 630℃,30 MPa,10 min,and 200℃/*** tribology test was run with ball-on-disc tribometer using steel ball as the counter *** the thermal test was processed with thermogravimetric analyzer(TGA)and laser flash apparatus(LFA).Results showed that the addition of 8 wt.%cnts and 8 wt.%nb reinforcements respectively decreased the coefficient of friction(COF)of the composite by 79%.The wear volume of the composite was decreased by 23%,and so was the wear ***,the thermal conductivity of the composite was equally improved by 44%.The tribology improvement was stimulated by a C film generated by cnts and a protective nb2O5 formed by nb *** thermal conductivity was improved by the grain refining property of nb and the high thermal conductivity of ***,these results indicated that al-cnts-nb composite is a robust material for high transmission conductor capable of reducing sag and ensuring the durability of the composite.

关键词： tribology thermal conductivity spark plasma sintering al-cnts-nb composite coefficient of friction

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