Martensitic relief observation by atomic force microscopy in yttria-stabilized zirconia

The tetragonal to monoclinic (t–m) phase transformation of zirconia has been the object of extensive investigations of the past 20 years and is now recognized as being of martensitic nature. However, martensitic transformation has only been observed by transmission electron microscopy or indirect methods. Though the benefit on the fracture toughness and crack resistance was the main interest, the transformation is now considered for its consequences on the degradation of the material. The use of atomic force microscopy reported here allowed the observation of the first stages of martensite relief growth and of new martensitic features.

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