Formation of Coarse-Grained Inter-Particle Regions During Hot Isostatic Pressing of Nanocrystalline Powder

摘要

In a compact that was hot isostatic pressed (HIPped) using nanostructured Al-5083/SiC_p composite powder prepared by cryo-milling, coarse-grained (reinforcement-free) inter-particle regions were observed. These coarse-grained regions formed via elemental diffusion towards the inter-particle pores during the HIPping process. This finding can well explain the bimodal grain-size distribution reported for various HIP-consolidated nanocrystalline metals.