Abstract
When a polycrystalline solid becomes chemically unstable at high temperatures, equilibration reactions occur in a reasonable time span to form a new solid solution in chemical equilibrium. Sometimes, the equilibrating reactions do not occur by conventional lattice diffusion but with boundary migration accompanied by boundary diffusion, forming a new solid solution behind the migrating boundaries. This phenomenon is referred to as Diffusion-Induced Grain-boundary Migration (DIGM) or Chemically Induced Grain boundary Migration (CIGM). When a liquid film migrates in a solid-liquid two-phase system with a liquid film between grains, the phenomenon is called Diffusion-Induced Liquid Film Migration or Liquid Film Migration (LFM). DIIM has been observed in a number of systems, but is most common in systems with substitutional solute elements. It is observed mostly when solute elements diffuse into or from the polycrystal and where the grain boundary or liquid film provides a rapid path for material transport. The interface migrates when the solutes go into or out of the bulk grain by lattice diffusion. DIIM involves the formation of a new solid solution with an asymmetric distribution of solute atoms by interface migration and lattice diffusion at the interface.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
