The material subject to investigation was two commercial alloys of cobalt CoCrW (No. 27 and 28) used in prosthodontics. The scope of research included performing an analysis of microstructure and functional properties (microhardness, wear resistance and corrosion resistance), as well as dilatometric tests. The examined alloys were characterized by diverse properties, which was considerably influenced by the morphology of precipitates in these materials. Alloy No. 27 has a higher corrosion resistance, whereas alloy No. 28 shows higher microhardness, better wear resistance and higher coefficient of linear expansion. Lower value of the expansion coefficient indicates less probability of initiation of a crack in the facing ceramic material.
 Z. Komorek, S. Jóźwiak, M. Kuchta, Arch. Odle. 6, 279 (2006),
 S.W. Majewski, Prot. Stom. 7, 124 (2007),
 M. Gładkowska, P. Montefka, P. Okoński,, Prot. Stom. 8, 105 (2008),
 F. Noack, Inter. Jour. Dental Tech. 13, 2 (2012),
 A. Łukaszczyk, J. Augustyn-Pieniążek, Arch. Met. Mat., 60, 523 (2015),
 D. Klimecka-Tatar, K. Radomska, G. Pawłowska, Jour. Balk. Tribol. Assoc. 21, 204 (2015),
 K. Beer-Lech, M. Szala, P. Piskorska, Ł. Majewski, Badania lejności i twardości stomatologicznego stopu odlewniczego na osnowie kobaltu, in Materials Engineering - Selected issues from materials engineering (2013),
 L. E. Ramirez, M. Castro, M. Mendez, J. Lacaze, M. Herrera, G. Lesoult, Sc. Mater., 47, 811 (2002)
 J. Augustyn – Pieniążek, A. Łukaszczyk, R. Zapała, Arch. Metal. Mater. 58, 1281 (2013),
 Sh. Zangeneh, H. R. Lashagari, A. Roshani, Mater. Design 37, 292 (2012),
 J. V. Giacchi, C. N. Morando, O. Fornaro, H. A. Palacio, Mater. Charact., 62, 53 (2011).