DOI number:10.1111/jace.19055
Journal:Journal of the American Ceramic Society
Abstract:Ultrafast high-temperature sintering (UHS) is a novel sintering technique with ultrashort firing cycles (e.g., a few tens of seconds). The feasibility of UHS has been validated on several ceramics and metals, however, its potential in consolidating glass-ceramics has not yet been demonstrated. In this work, an optimized carbon-free UHS was utilized to prepare ZrO2-SiO2 nanocrystalline glass-ceramics (NCGCs). The phase composition, grain size, densification behavior, and microstructures of NCGCs prepared by UHS were investigated and compared with those of samples sintered by pressure-less sintering (PS). Results showed that NCGCs with a high relative density (ཞ95%) can be obtained within ཞ50 s discharge time by UHS. The UHS processing not only hindered the formation of ZrSiO4 and cristobalite, but also enhanced the stabilization of t-ZrO2. Meanwhile, owing to the ultrashort firing cycles, the UHS technology allowed the NCGCs to be consolidated in a far from equilibrium state. The NCGCs showed a microstructure of spherical monocrystalline ZrO2 nanocrystallites embedded in an amorphous SiO2 matrix.
Co-author:Jinhua Wu, Sharath Kumar Manjeshwar Sathyanath, Bohan Wang, Klaus Leifer, Hakan Engqvist
First Author:Le Fu*
Indexed by:Journal paper
Correspondence Author:Salvatore Grasso, Wei Xia
Volume:106
Page Number:4005-4012
Translation or Not:no
Included Journals:SCI
Links to published journals:https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.19055