Hot oscillatory pressing of B <sub>4</sub> C ceramics for improving densification and mechanical properties
Lei Fan, Jihe Li, Yanbo Huang, Yang Gao, Shoulei Yang, Linan An
Abstract
Abstract B 4 C ceramics were prepared by conventional hot pressing (HP) and hot oscillatory pressing (HOP). The results show that at the temperature and pressure studied here, the main densification mechanism of HP is grain‐boundary sliding, whereas that of HOP is plastic deformation caused by dislocation gliding, indicating that the oscillatory pressure promoted plastic deformation of the material. The hardness of B 4 C prepared by HOP reaches 39.5 GPa, which is much higher than the hardness of sample prepared by HP. The current study suggests that HOP is promising for preparing high‐performance B 4 C ceramics.
Topics & Concepts
Materials scienceCeramicPressingHot pressingComposite materialGrain boundaryDislocationGrain Boundary SlidingSevere plastic deformationMetallurgyMicrostructureBoron and Carbon Nanomaterials ResearchAdvanced ceramic materials synthesisMXene and MAX Phase Materials