Influence of Grain Size on Effects of Thermal Expansion Anisotropy in MgTi ₂ O ₅

This is the authors' abstract. We don't add key points for this paper.

Properties relating to the effects of thermal expansion anisotropy were measured as functions of grain size in hot‐pressed dense MgTi 2 O 5 . Samples with grains smaller than ∼3 μm exhibited none of the microcracking attributed to thermal expansion anisotropy, whereas those with larger grains had all the characteristics. An energy criterion is proposed to explain the grain‐size effect on microcracking in ceramics exhibiting high degrees of thermal expansion anisotropy.