Martensitic growth in ZrO2--An in situ, small particle, TEM study of a single-interface transformation

An in situ TEM experiment on martensitic growth was performed using submicron ZrO2 particles of a square-platelet shape. The transformation was between the orthorhombic and the monoclinic phases and involved a simple shear plus a dilatation in the shear plane. The o/m interface propagated at a speed of 2 nm/s, while maintaining a sharp habit plane which was stepped on the unit cell scale. The average inclination of this stepped interface obeyed the invariant plane strain condition. While no long-range stresses were present, dislocation-like line contrast was revealed at the steps. These results are analyzed in terms of the coherency dislocation concept. Fundamental properties, such as the interfacial energy, Peierls stress and nucleus size, have been deduced.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/28555/1/0000357.pd

Systematic reviews of osteopathic care: a scoping review

The scoping review will synthesise what is known about osteopathic care as described in systematic reviews. The review will inform stakeholders about the role of osteopathic care in the health system and provide recommendations for future research. The findings will be submitted for peer-review publication

Transformation toughening in zirconia - containing ceramics

The recognition of the potential for enhanced fracture toughness that can be derived from controlled, stress-activated tetragonal (t) to monoclinic (m) transformation in ZrO-based ceramics ushered in a new era in the development of the mechanical properties of engineering ceramics and provided a major impetus for broader-ranging research into the toughening mechanisms available to enhance the fracture properties of brittle-matrix materials. ZrO-based systems have remained a major focal point for research as developments in understanding of the crystallography of the t→m transformation have led to more-complete descriptions of the origins of transformation toughening and definition of the features required of a transformation-toughening system. In parallel, there have been significant advances in the design and control of micro-structure required to optimize mechanical properties in materials developed commercially. This review concentrates on the science of the t→m transformation in ZrO and its application in the modeling of transformation-toughening behavior, while also summarizing the microstructural control needed to use the benefits in ZrO-toughened ceramics