https://www.sciencedaily.com/releases/2021/12/211202102101.htm
Researchers have used electron energy loss spectroscopy to directly measure the coefficient of thermal expansion at grain boundaries in the polycrystalline...
feel the heatgrain boundariesmore thanpolycrystalothers
https://www.ornl.gov/publication/oscillating-grain-boundaries-and-their-effects-grain-growth-observations-skyrmion
Grain boundary migration is usually considered to occur through the consistent motion of grain boundaries toward their centers of curvature, ultimately leading...
grain boundariesoscillatingeffectsgrowthobservations