Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

International Conference on Innovative Research - ICIR Euroinvent 2017

Lungu, M.V.^1 ; Lucaci, M.^1 ; Tsakiris, V.^1 ; Brtulescu, A.^1 ; Cîrstea, C.D.^1 ; Marin, M.^1 ; Ptroi, D.^1 ; Mitrea, S.^1 ; Marinescu, V.^1 ; Grigore, F.^1 ; Tlpeanu, D.^1 ; Stancu, N.^1 ; Godeanu, P.^2 ; Melnic, C.^2

Advanced Materials Department, National Institute for Research and Development in Electrical Engineering ICPE-CA (INCDIE ICPE-CA), 313 Splaiul Unirii Street, Bucharest

030138, Romania^1

MAIRA MONTAJ SRL, 166 Stirbei Voda Street, Bucharest

010121, Romania^2

关键词: Arcing contact;    Consolidation process;    High-voltage switching;    Homogeneous microstructure;    Relative density;    Sintering temperatures;    Thermal and mechanical properties;    Tungsten-copper;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/209/1/012012/pdf
DOI  :  10.1088/1757-899X/209/1/012012

来源: IOP

【 摘 要 】

Tungsten-copper (W-Cu) sintered parts with 75 wt.% W, 24 wt.% Cu and 1 wt.% Ni for using as arcing contacts in medium and high voltage switching devices were developed successfully by powder metallurgy (PM) techniques. Sintered parts with diameter of 50±0.5 mm and height of 6±0.5 mm were manufactured by pressing-sintering-infiltration (P-S-I) and spark plasma sintering (SPS) at sintering temperature of 1150°C, and 1050°C, respectively. Physical, chemical, electrical, thermal and mechanical properties of the samples were investigated. Microstructure was analyzed by optical microscopy and scanning electron microscopy. Material properties were influenced by the consolidation processes. The best results were achieved by SPS process. The relative density was more than 95 %, Vickers hardness HV1/15 was over 227, elastic modulus was over 143 GPa, and homogeneous microstructure was revealed. These good properties can contribute to higher lifetime of arcing contacts under severe working conditions.