Hence, grain-boundary effects on charge transport are large, and, as a result, large variations in charge carrier mobility, transport activation energy 16, threshold voltage and degradation rate ...

However, there are important exceptions, especially in cases for which compromises must be made between mechanical and electrical properties and costs. In these materials, grain boundaries play a ...

(Nanowerk News) A team of researchers found that randomly selected, high-angle, general grain boundaries in a nickel-bismuth (Ni-Bi) polycrystalline alloy can undergo interfacial reconstruction to ...

"These grain boundaries have an enormous influence on the durability and overall performance of a material," says Dr. Vivek Devulapalli who has performed the microscopy work of the study.

Engineers mimic atom-scale grain boundaries with magnetic particles to see how shear stress influences their movement. Rice University engineers who mimic atom-scale processes to make them big ...

Grain boundaries are interfaces that separate different crystallographic regions, known as grains, within a polycrystalline material. In nanomaterials, grain boundaries play a crucial role in ...

Based on the above theoretical mineral physics approach, the team examined the mechanical behavior and thermodynamic properties of high-angle tilt grain boundaries in (Mg,Fe)O ferropericlase ...

Results indicate that grain boundary strength and motion, accommodated by either shear-coupled migration (SCM) or grain boundary sliding (GBS), strongly varies with pressure resulting in grain ...

Image credit: Aditya Sood, Stanford University. Imperfections such as grain boundaries in a material affect how efficiently it can transport heat at the nanoscale. A team of researchers led by Kenneth ...