Sintering of Glass Powder Packings with Metal Inclusions
- 1 January 1991
- journal article
- Published by Springer Nature in MRS Proceedings
Abstract
The sintering of glass powder packings with metal inclusions has been studied using (a) a loading dilatometer, and (b) an in-situ SEM hot-stage. The addition of a small volume fraction of metal particles unexpectedly increases the sintering rate of the composite. With a further increase in the volume fraction of inclusions the sintering rate decreases rapidly to zero at a well-defined threshold. The in-situ sintering experiments have been used to observe the sintering mechanisms and to determine the parameters that contribute to this phenomenon: to assess the distribution of inclusions, and the nature of inclusion-inclusion and matrix-inclusion interaction. Predictions of the effective sintering rate are computed using a truss model with randomly distributed inclusions. The computations capture accurately the decrease in sintering rate (beyond the initial increase) with increasing volume fraction of inclusions. The initial increase is attributed to a reduction in viscosity of the glass due to chemical interaction with the metal.Keywords
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