Fig. 1 Microstructures of Composite A: a optical micrograph showing the distribution of B4C particles and TEM images showing b the grain structure and c Al2O3

Fig. 2 Tensile stress-strain curves of a Composite A, b Composite B at various temperatures

Fig. 3 Change in creep strain and instantaneous creep rate with time at 300 °C for Composite A at applied stresses of a 75 MPa, b 85 MPa, and for Composite B at applied stresses of c 13 MPa, d 20 MPa

Fig. 4 Variation of steady state creep rate with applied stress for a Composite A and b Composite B, and c Arrhenius plot of steady state creep rate against 1000/T for both composites

Fig. 5 Variation of (strain rate)(1/n) with applied stress, σ, for Composite A at a 300 °C, b 350 °C, c 400 °C

Fig. 6 Variation of (strain rate)(1/n) with applied stress, σ, for Composite A at a 200 °C, b 250 °C, c 300 °C

Fig. 7 Plots of a ($\dot{\varepsilon }$/DL) vs (σ???σ0)/E in double logarithmic coordinates, b ($\dot{\varepsilon }$/DL)1/8 vs (σ???σ0)/E in double linear coordinates

Fig. 8 TEM images showing grain microstructure of specimens after creep testing at 350 °C under a 75, b 105 MPa, and c Al2O3 distribution after creep testing at 350 °C under 75 MPa

Fig. 9 Plots of the a MG and b DM relations showing the static creep rupture behavior of Composite A