The correlation between the microstructure of Ag-C, Ag-WC-C and AgWC composites and their switching properties was investigated. Two methods were used to manufacture the starting powder mixtures, namely classical milling and mechanical alloying . The arc erosion, contact resistance and welding forces of the contact materials obtained by different methods were measured using model devices. This paper presents the results achieved for the tested materials. It was found that weight loss was lower for the contacts produced by high energy milling
 M. Chmielewski, K. Pietrzak, Processing, microstructure and mechanical properties of Al2O3-Cr nanocomposites, Journal of the European Ceramic Society 27, 2-3, 1273-1279 (2007).
 W. Weglewski, M. Basist a, M. Chmielews-ki, K. Pietrzak, Modeling of thermally induced damage in the processing of Cr-Al2O3 composites, Composites Part B-Engineering 43, 2, 255-264 (2012).
 P.C. Wingert, S.E. Alle n, R.C. Bevingto n, The effects of graphite particle size and processing on the performance of silver-graphite contacts; IEEE CHMT 15, 2, 154-159 (1992).
 P. Wingert, The effects of interrupting elevated currents on the erosion and structure of silver-graphite. 42th IEEE Holm Conference with 18th ICEC, Chicago, 60-69 (1996).
 V. Behrens, E. Mahl e, R. Michal, K.E. Saeger, An advanced silver/graphite contact material based on graphite fibre; ICEC, Loughborough, 185-189 (1992).
 V. Behrens, Th. Honi g, A. Krau s, E. Mahl e, R. Michal, K.E. Saeger, The results of different silver/ graphite contact materials in regard to applications in circuit breakers; 41st IEEE Holm Conference, 393-397 (1995).
 C. Peuker, F. Hauner, Influence of microstructure on the switching behaviour of Ag C; SAP, Lodz, 213-218 (2001).
 H. Wieser, F. Hauner, The thermo-mechanical craking of Ag Ccontacts with parallel carbon structure; 21st ICEC, Zurich, 438-442 (2002).
 Peng Jiang, Feng Li, Yaping Wang, Effect of different types of carbon on microstructure and arcing behavior of Ag/Ccontact materials; IEEE Transactions on Components and Packaging Technologies 29, 2, 420-423 (2006).
 P. Borkowski, E. Walczu k, D. Wójcik - Grzy -be k, K. Frydma n, D. Zasada, Electrical properties of Ag-Ccontact materials including different carbon allotropic form; 25th ICEC&56th IEEE Holm Conference on Electrical Contacts, Charleston, 167-175 (2010).
 M. Chmielewski, D. Kalinski, K. Pietrzak, Relationship between mixing conditions and properties of sintered 20Al N/80Cu composite materials, Archives of Metallurgy And Materials 55, 2, 579-585 (2010).
 D. Kalinski, M. Chmielewsk i, K. Pietrzak, K. Choregiewicz, An influence of mechanical mixing and hot-pressing on properties of Ni Al/Al2O3 composite, Archives of Metallurgy and Materials 57, 3, 695-702 (2012).
 O. Schrott, Preparation of WC/Ag contact materials with different homogenity; Structure Magazine 40, Struers 6-8.
 J.S. Benjamin, T.E. Voli n, The mechanism of mechanical alloying, Metallurgical Transactions A 5A, 1929-1943 (1974).
 C. Suryanarayana, Mechanical alloying and milling; Progress In Materials Science 46, 1-184 (2001).
 D.L. Zhang, Processing of advanced materials using high-energy mechanical milling; Progress In Materials Science 49, 537-560 (2004).
 A. Gładki, D. Wójcik - Grzybe k, K. Fryd -ma n, Badania modelowe morfologii mieszanin proszków Ag-Cuzyskanychwprocesie mechanicznej syntezy; Materiały Elektroniczne 1, 3-12 (2010).
 K. Frydman, D. Wójcik - Grzybe k, P. Borkows-ki, E. Walczu k, Własciwosci fizyczneiłaczeniowe stykówzkompozytów Ag-WC-Ci Ag-W-C; Inzynieria Materiałowa 1, 32-39 (2009).
 P. Borkowski, D. Boczkowski, T. Wysock i, Computer-controlled system for testing contacts on switching high current. Measurement 40, 3, 294-299 (2007).
 P. Borkowski, E. Walczuk, Computerized measurement stands for testing static and dynamic electrical contact welding. Measurement 44, 9, 618-1627 (2011).