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Interfacial Dewetting in Silicon Nitride Containing Aligned Grains



B Hockey, D S. Park, H D. Kim, S W. Lee


It is generally believed that liquid phase sintering of silicon nitride invariably results in a continuous intergranular phase such that individual grains are separated by a glassy interphase, typically as thin as I nm. To the contrary, results presented here show that when the relative misorientation between adjacent grains is small, interfacial dewetting occurs and the grains are directly joined by a low-angle dislocation boundary. The occurrence of interfacial dewetting is discussed in terms of the minimization of interfacial energy and is identified as an integral process in the lateral growth of grains and the microstructural development of liquid phase sintered silicon nitrides containing prealigned Β-Si3N4 whiskers.


interfacial dewetting, SEM, silicon nitride, TEM


Hockey, B. , Park, D. , Kim, H. and Lee, S. (2017), Interfacial Dewetting in Silicon Nitride Containing Aligned Grains, Science (Accessed June 15, 2024)


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Created February 19, 2017