Density gradients and springback: environmental influences

摘要: Laser dilatometry was combined with X-ray computed tomography (XRCT) to investigate the relationship between springback and internal density gradients in dry-pressed alumina compacts. Compacts were prepared using same binder content but different states of plasticization examine these effects on dimensions final distribution. Both microstructural-level characteristics exert control over differential behavior; expansion low-density (LD) zone is larger than that high-density (HD) zone. For submicron powders, concentration associated leads potential loss dimensional tolerance. A sinusoidal response, dependent upon state binder, noted, which changes dramatically time environmental exposure. In some cases, occurred due moisture absorption/desorption compacts at relative humidities from ambient conditions.