High pressure densification behavior of alumina particles. (15th January 2021)

• Record Type: Journal Article
• Authors: Liu, Fangming; Zhang, Jiawei; Liu, Pingping; He, Duanwei
• Is Part Of: Scripta materialia. Number 191(2021)
• Page Start: 101
• Page End: 106
• Publication Date: 2021-01-15
• Subjects: High pressure -- Alumina ceramics -- Microstructure -- Plastic deformation -- Densification mechanism; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.09.021
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Pressure is an important thermodynamic parameter in addition to temperature and chemical composition during material sintering process. However, few experimental images intuitively describing the densification process of grains during compression, especially for the high melting point ceramics. Here we observed deformation evolution and mechanical response of spherical alumina particles after high pressure treatment. By analyzing the plastic deformation and grain boundary characters of spherical alumina particles, and the boundary stress and yield stress variation of grains under various pressures and temperatures, a clear picture of the high-pressure powder densification and sintering process is depicted. Graphical abstract: Image, graphical abstract