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求摘要翻译(si3n4)
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本文采用氧化后再氧化的实验方法$通过对纳米Si3N4陶瓷试样氧化行为的研究和 氧化动力学的分析并讨论了纳米Si3N4陶瓷的氧化机理% 结果表明:Si3N4陶瓷的氧化行为表现为氧化增量随时间的变化服从抛物线规律)!ΔW"2=Kpt %提出了氧在氧化层中的向内扩散是Si3N4氧化过程中的控制步骤(得出烧结添加剂或杂质对Si3N4陶瓷氧化速度的影响是由于改变了氧化层的组成#结构$使氧在氧化层中的扩散速度发生了变化的结论。 |
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119227086(金币+28, 翻译EPI+1):很感谢! 2010-04-21 17:06
| The oxidation mechanism of nano Si3N4 ceramics was discussed by studing oxidation behavior and oxidation kinetics of nano Si3N4 ceramics samples as well as by reoxidation experiment. The results showed that the oxidation weight gains of Si3N4followed parabolic law !ΔW"2=Kpt as the time increased.Oxygen diffusion from outside surface to inside of oxidation layer was a controlled step and the effects of additives and impurities on Si3N4 oxidation speed were produced by changing diffusion speed which came from the change of composition and structure in oxidation layer. |

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