Nanostructured Cu_Cr_W pseudoalloys by combined use of high-energy ball milling and spark plasma sintering

International Conference on Synthesis and Consolidation of Powder Materials

Shkodich, N.F.^1 ; Kuskov, K.V.^2 ; Kovalev, I.D.^1 ; Scheck, Yu.B.^1

Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka

142432, Russia^1

National University of Science and Technology, MISIS, Moscow

119049, Russia^2

关键词: Contact material;    High-energy ball milling;    Nano-structured;    Nanostructured Cu;    Planetary ball mill;    Preparation conditions;    Submicron and nanoscale;    Uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/558/1/012047/pdf
DOI  :  10.1088/1757-899X/558/1/012047

来源: IOP

【 摘 要 】

Nanostructured pseudoalloys of immiscible Cu, Cr and W metals were prepared by combined use of high-energy ball milling (HEBM) and spark plasma sintering (SPS). Mechanical alloying in an Activator-2S planetary ball mill for 150 min provides a uniform distribution of refractory Cr and W particles in a moldable Cu matrix on a submicron and nanoscale level. Activated W-Cu-Cr powders were SPS-consolidated at 800-1000° C and 50 MPa for 10 min. The effect of preparation conditions on the microstructure, crystal structure, and properties (density, hardness, electric resistivity) of synthesized nanostructured W-Cu-Cr pseudoalloys was studied. The consolidated W-Cu?-Cr composites showed a hardness of up to 9.5 GPa and an electric conductivity of 27-28% IACS, which makes them promising for use as an interrupter contact material.