Liquid Phase Sintering of Alumina, I. Microstructure Evolution and Densification |
| |
Authors: | Weimin Dong Himanshu Jain Martin P Harmer |
| |
Affiliation: | Department of Materials Science and Engineering, and the Center for Advanced Materials and Nanotechnology, Lehigh University, Bethlehem, Pennsylvania 18015 |
| |
Abstract: | The microstructure evolution and densification of alumina containing 10 vol% calcium aluminosilicate glass and 0.5 wt% magnesium oxide sintered at 1600°C were quantified by measuring the evolution of pore-size distribution, the redistribution of liquid phase, and the fraction of closed and open pores. The densification stopped at a limiting relative density during the final stage of sintering, and the small and large pores were filled simultaneously by glass during sintering. In addition, the results indicate that the pressure build-up of the trapped gases in pores causes a significantly negative contribution to the driving force, and consequently the observed reduction in densification during the final stage of liquid phase sintering. |
| |
Keywords: | |
|
|