Fig. 12

(a) Output load – displacement curve of diametrical compressive test for all samples, start of crack initiation at the bilayer interface at: (b) 1280 ᵒC, (c) 1300 ᵒC and (d)1320 ᵒC.

(a) Output load – displacement curve of diametrical compressive test for all samples, start of crack initiation at the bilayer interface at: (b) 1280 ᵒC, (c) 1300 ᵒC and (d)1320 ᵒC.