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Superplastic deformation behavior is examined for Al 2 O 3 -based ceramics dispersed with 10 vol% ZrO 2 and 10 vol% spinel (MgO.1.3 Al 2 O 3 ) particles. The multiple-phase dispersion considerably decreases the rate of grain growth during deformation, leading to enhanced superplasticity (larger tensile elongation and higher strain rate). Maximum tensile elongation...
Creep deformation is simulated in a two-dimensional polycrystalline aggregate by incorporating a dynamic grain growth model, where diffusive matter along grain boundaries contributes to grain growth during deformation, into a diffusional creep model where grain boundary diffusion accommodates grain boundary sliding. The simulated microstructural evolution shows that grain boundary sliding relates...
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