Improving tribological and thermal properties of Al alloy using CNTs and Nb nanopowder via SPS for power transmission conductor

作     者：Chika O.UJAH Patricia POPOOLA Olawale POPOOLA Victor AIGBODION Philip OLADIJO Chika O.UJAH;Patricia POPOOLA;Olawale POPOOLA;Victor AIGBODION;Philip OLADIJO

作者机构：Department of ChemicalMetallurgical and Materials EngineeringTshwane University of TechnologyPretoria 0001South Africa Department of Electrical EngineeringTshwane University of TechnologyPretoria 0001South Africa Department of Metallurgical and Materials EngineeringUniversity of NigeriaNsukka 410001Nigeria Department of ChemicalMaterials and Metallurgical EngineeringBotswana International University of Science and TechnologyPalapye 12345Botswana Department of Mechanical EngineeringUniversity of JohannesburgJohannesburg 2000South Africa 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2020年第30卷第2期

页      面：333-343页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Centre for Energy and Electric Power (CEEP)  Tshwane University of Technology  Pretoria  NRF and DHET for providing financial aid to this project 

主　　题：tribology thermal conductivity spark plasma sintering Al-CNTs-Nb composite coefficient of friction 

摘      要：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.