Microstructure and thermal stability of ZrB2 powder infiltrated by molten Cu and CuCr1Zr alloy
BERONSKA, N., OPÁLEK, A., NAGY, Š., DVORÁK, T., ŠVANTNER, T., ŠVEC, P., ŠTEFÁNIK, P., IŽDINSKÝ, K.
vol. 57 (2019), no. 2, pp. 95 - 103
DOI: 10.4149/km_2019_2_95
Abstract
 Cu/ZrB2 and CuCr1Zr/ZrB2 composites were prepared by gas pressure infiltration technology. The ZrB2 powder was used as reinforcement. No interfacial reaction took place for Cu, or CuCr1Zr matrix, as confirmed by transmission electron microscopy (TEM). The thermal stability of composites was very good, i.e. without any indication of possible disintegration. Composites exhibit high structural stability when subjected to 5 consecutive heating/cooling cycles to 800 °C. Maximums of relative elongations recorded for particular heating/cooling cycles slightly increased for Cu/ZrB2 composite and slightly decreased for CuCr1Zr/ZrB2 composite. However, the differences are negligible. Key words
Cu-ZrB2 composite materials, metal matrix, ceramic powder, gas pressure infiltration, thermal expansion ![[open article.pdf]](full_yes.gif) Full text (1063 KB)
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