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TEM observation on nucleation of Ca α-Sialon

机译：Caα-Sialon成核的TEM观察

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摘要

Ca α-Sialon compacts pressurelessly-sintered to the intermediate temperature (1 450 deg. C) were investigated with TEM for an overall composition Ca_1.8Si_6.6Al_5.4O_1.8N_14.2 It was found that in most cases, the newly-formed α-Sialon Grains had no epitaxial orientation relationship with the Si_3N_4 particles; only occasionally heteroepitaxial nucleation Of α-Sialon on α-Si_3N_4 was detected. Further EDAX analysis Revealed a much higher Ca concentration in the non-epi- Taxially nucleated α-Sialon than in the heteroepitaxially nu- Cleated α-Sialon.
机译：用TEM研究了无压力烧结至中间温度（1450℃）的Caα-Sialon压块的整体组成Ca_1.8Si_6.6Al_5.4O_1.8N_14.2 α-Sialon晶粒与Si_3N_4颗粒没有外延取向关系。仅偶尔检测到α-Sialon在α-Si_3N_4上的异质外延成核。进一步的EDAX分析显示，非外延成核的α-Sialon中的Ca浓度远高于异质外延成核的α-Sialon。

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