Manufacturing Technology 2015, 15(3):377-380 | DOI: 10.21062/ujep/x.2015/a/1213-2489/MT/15/3/377

Compressive Creep Testing of Composites on the Based of MoSi2 - SiC Nanoparticles

Natália Luptáková1,2, Beáta Ballógová3, Petr Dymáček1,2
1 CEITEC-IPM, Žižkova 22, 616 62 Brno, Czech Republic
2 Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic
3 Institute of Materials Research of Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic

The aim of this study is to investigate the creep resistance of molybdenum disilicide (MoSi2-SiC) based composites with different types of embedded particles. The materials were prepared via powder metallurgy using high temperature controlled reaction sintering (CRS). The creep experiments were performed in uniaxial compression at constant stress in the temperature range from 1273 K (1000 °C) to 1473 K (1200 °C) for applied stress from 50 to 100 MPa. Creep was tested by stepwise loading: in each step, the load was changed to a new value after steady state creep rate had been established. The applied stress dependences of the creep rate at different temperatures were analyzed in terms of stress exponent (n) and activation energy (Q). Possible rate-controlling mechanisms were suggested.

Keywords: MoSi2-SiC, creep test, compressive creep, stress exponent, activation energy

Published: June 1, 2015  Show citation

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Luptáková N, Ballógová B, Dymáček P. Compressive Creep Testing of Composites on the Based of MoSi2 - SiC Nanoparticles. Manufacturing Technology. 2015;15(3):377-380. doi: 10.21062/ujep/x.2015/a/1213-2489/MT/15/3/377.
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