Theoretical study of densification of nano-sized 3Y-TZP powder: density-grain growth coupling model
- 117 Downloads
Ultra fine-grained ceramic components, which can be obtained by densification of nano-sized powder, can provide excellent mechanical properties for many advanced applications. A better understanding of the densification process of such nano-ceramic materials could provide more insight on the processing of these materials. In this article, a constitutive model, with density and grain size as coupling state variables, was developed to describe the pressureless sintering of nano-sized 3Y-TZP materials. The sintering mechanism and essential sintering parameters were studied. It is found that interface reaction mechanism describes the process well and is proposed to be the dominant mechanism during the densification of nano-sized material.
KeywordsConstitutive model Sintering 3Y-TZP Interface reaction Ceramics Nanomaterials
- Ashby MF (1990) Sintering and isostatic pressing diagrams (Technical report). University of Cambridge, Cambridge, UKGoogle Scholar
- Frost HJ, Ashby MF (1982) Deformation mechanism maps. Pergamon Press, OxfordGoogle Scholar
- Ma J, Cocks ACF (1997) Symposium on mechanics of granular and porous materials. Cambridge, UK, p 234Google Scholar
- Shewmon PG (1964) The movement of small inclusions in solids by a temperature gradient. Trans Metall Soc AIME 230(5):1134–1137Google Scholar