Hot-Pressing Behavior of Si3N4 |
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| Authors: | G R TERWILLIGER F F LANGE |
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| Affiliation: | Westinghouse Research Laboratories, Pittsburgh, Pennsylvania 15235 |
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| Abstract: | The densification behavior of Si3N4 containing MgO was studied in detail. It was concluded that MgO forms a liquid phase (most likely a magnesium silicate). This liquid wets and allows atomic transfer of Si3N4. Evidence of a second-phase material between the Si3N4 grains was obtained through etching studies. Transformation of α- to β-Si3N4 during hot-pressing is not necessary for densification. |
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