Compressive creep tests were performed on a CoCrFeNiMn equiatomic alloy with the dispersion of (i) aluminum nitride or (ii) boron nitride at temperatures of 973 K and 1073 K. The results are compared with previously published creep rates of the unreinforced matrix alloy and the alloy when strengthened by yttrium + titanium oxides. The comparison reveals that the creep rate is essentially unchanged by the presence of aluminum nitride particles, whereas it is reduced by the presence of oxide particles. Boron nitride particles do not influence the creep rate at low stresses but reduce it substantially at high stresses.

Institute of Physics of Materials Academy of Sciences of the Czech Republic Žižkova 22 CZ 61662 Brno Czech Republic

Institute of Plasma Physics Academy of Sciences of the Czech Republic Za Slovankou 1782 3 CZ 18200 Praha Czech Republic

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