研究目的

To investigate the room temperature creep-deformation of potassium dihydrogen phosphate (KDP) crystals with the aid of nanoindentation to understand the plastic deformation mechanisms of KDP crystals.

研究成果

The study demonstrated that KDP crystals can be plastically deformed at the nano-scale through dislocation motion, which is responsible for creep-deformation. The creep rate and depth decrease with reduced peak force and loading rate. The presence of pop-ins in load-displacement curves indicates dislocation nucleation and propagation. The findings suggest that KDP crystals exhibit permanent deformation at room temperature under nanoindentation, which is crucial for understanding their mechanical properties and improving machining processes.

研究不足

The study focuses on the nano-scale plastic deformation of KDP crystals at room temperature, and the findings may not directly apply to macro-scale or high-temperature conditions. The creep mechanism is primarily attributed to dislocation motion, but other factors like dislocation interactions and strain-hardening effects are also considered.