Abstract Scope |
High heating rate sintering methods have been known, for ≈4 decades, to enhance the rate of densification relative to that of coarsening. Limited experimental evidence also suggests that high heating rate sintering methods better facilitate constrained sintering than conventional sintering, presumably by mitigating sintering stresses. These effects are difficult to rationalize in context of classical sintering models from Coble, Kuczynski, and Johnson and Cutler. Prof. Kaplan has been a strong voice in the field in support of the idea that atomic scale mechanisms should be invoked more often to better inform our understanding of microstructural evolution at the continuum scale. In that vein, this talk will discuss the importance of the densification mechanism in affecting stress evolution during sintering and the sintering trajectory during high heating rate sintering. The discussion will be supported by our experimental results from microscale bicrystal sintering and Coble creep experiments. |