Control of high temperature mass transport phenomena through grain boundaries in oxide ceramics based on grain boundary chemical composition and external electric field

Grain boundary segregation in oxide ceramics

D PR O Abstract The factors which control grain boundary segregation in oxide ceramics are reviewed. These include grain boundary energy, cation–cation interactions, impurity cation size, as well as electrostatic interactions with the grain boundary space charge. In addition, an approach for measuring grain boundary segregation in those materials, as a function of the five macroscopic parameter...

Chemical stability of grain boundaries in β-tricalcium phosphate ceramics

Dislocations and Grain Boundaries in Ceramics and Metals

This paper is offered as a tribute to the late Gareth Thomas and the celebration of his career using transmission electron microscopy. His early work on dislocations and twin boundaries in metals suggested indirect methods for determining the stacking-fault energies (SFEs) of Al [1] and Ni [2] and subsequently examined questions on how the measured values of SFEs of copper alloys change when th...

آفات انباری غلات و طرق مبارزه با آنها storage fests of grain and their control

چکیده ندارد.

Anelastic Grain-Boundary Sliding in Ceramics. II. Polycrystals with Glassy Boundaries

Systematic experimentation on grain-boundary sliding of ceramics with a glassy film at grain boundaries has been carried out by low-frequency internal friction technique up to =2200K. A model silicon nitride polycrystal was selected for this basic investigation in which the grains were continuously encompassed by a nanometre-sized film of pure SiO, glass. The SiO, film was also doped with incre...