Title :
Sintered electrical contacts for vacuum current interruption
Author :
Lungu, P. ; Enescu, E. ; Lungu, M. ; Pavelescu, D. ; Dumitrescu, Gh ; Anghelita, P.
Author_Institution :
INCDIE ICPE-CA, Bucharest
Abstract :
The paper presents the experiments of elaboration copper-chromium electrical contacts, with 40-75 % copper content, manufactured by powder metallurgy techniques: infiltration with copper of a chromium frame and solid state sintering of chromium and copper powder mixture. The influence of technological parameters - powder granulometry, compacting pressure, sintering and infiltration temperature - on the physical (density, hardness) and microstructural characteristics of contacts are presented. The elaborated contacts were tested in order to determine their properties in the case of high currents interruption.
Keywords :
chromium alloys; copper alloys; electrical contacts; powder metallurgy; sintering; vacuum interrupters; chromium frame; compacting pressure; copper-chromium electrical contacts; powder granulometry; powder metallurgy techniques:; sintered electrical contacts; solid state sintering; vacuum current interruption; Chromium; Contacts; Copper; Furnaces; Grain size; Manufacturing; Powders; Pressing; Solid state circuits; Temperature;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2008. ISDEIV 2008. 23rd International Symposium on
Conference_Location :
Bucharest
Print_ISBN :
978-973-755-382-9
Electronic_ISBN :
1093-2941
DOI :
10.1109/DEIV.2008.4676768
