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Oswald ripening °ÂË¹ÌØÍß¶ûµÂÊ컯

Oswald Ripening
On prolonged heat treatment, the precipitates coarsen to decrease the interfacial free energy between the precipitate and the matrix. This process is called Oswald ripening.
During Oswald ripening the volume fraction Vf of precipitates remains constant and the diameter of the precipitates increases. Small particles dissolve and the resultant material deposits on larger particles causing them to grow.




Basic schematic of the Ostwald ripening process
Ostwald ripening is an observed phenomenon in solid (or liquid) solutions which describes the evolution of an inhomogenous structure over time. The phenomenon was first described by Wilhelm Ostwald in 1896.[1] When a phase precipitates out of a solid, energetic factors will cause large precipitates to grow, drawing material from the smaller precipitates, which shrink
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