PHYSICAL PROPERTIES OF SHORT CARBON FIBRE REINFORCED SILVER COMPOSITES

查看全文 作　　者：WANG Chengfu, YING Meifang, FENG Yi, ZHANG XiaogunHefei University of Technology. Hefei, China 出　　处：《Acta Metallurgica Sinica(English Letters)》索引1994年第7卷第3期,共4页 摘　　要：The electric contact is always made of silver and graphite,the electric conductivity of con-tact materials decreases as the graphite content increased.The hardness of silver-graphiteis low,for example,the hardness of the 3wt% graphite-silver is HB 24.5-39.8MPa,andthe electric conductivity,is 72% IACS.The present work reports the similarity of electricconductivity for the 3wt% short carbon fibre-Ag composite and 3wt% graphite-silver.However,the hardness of the short carbon fiber-Ag composite is two times harder thanthat of graphite-silver. The specific gravity of graphite is 2.2g/cm^3,and that of carbonfibre is 1.75g/cm^3,so the 3wt% short carbon fibre-Ag composite contact will still save5-7%Ag.The electric life of Ag-carbon fibre is much higher than silver-graphite at thesame Ag contact. 关 键 词：carbon FIBRE silver-graphite electric contact