| 氮化硅陶瓷烧结微结构演化的同步辐射CT实时研究 |
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| 引用本文： | 许峰,胡小方,赵建华,袁清习.氮化硅陶瓷烧结微结构演化的同步辐射CT实时研究[J].化学学报,2009,67(11):1205-1210. |
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| 作者姓名： | 许峰 胡小方 赵建华 袁清习 |
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| 作者单位： | 1. 中国科学技术大学中国科学院材料力学行为和设计重点实验室,合肥,230026
2. 中国科学院高能物理研究所,北京,100039 |
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| 基金项目： | 国家自然科学基金(No.10732080);;北京同步辐射实验室(BSRF)基金资助项目 |
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| 摘 要： | 利用同步辐射CT (SR-CT)技术, 在氮化硅陶瓷样品烧结过程中对其进行实时投影成像, 并应用滤波反投影算法和数字图像处理技术, 得到了样品在整个烧结过程中内部微结构演化的二维和三维重建图像, 实现了对陶瓷固相烧结过程实时、无损的观测. 通过重建图像清晰观测到了陶瓷样品在烧结三个阶段中颗粒接触、烧结颈形成、晶粒和气孔长大、气孔球化并收缩等烧结现象; 统计了样品在不同烧结时刻的孔隙率, 得到了孔隙率随烧结时间对数的变化曲线, 并根据曲线分析了样品在不同烧结时刻致密化速率的变化, 得到了烧结中期孔隙率和时间对数的线性关系. 实验的结果和现有烧结理论相吻合, 并为进一步完善烧结理论提供了有效的实验数据.
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| 关 键 词： | 材料检测与分析技术 固相烧结 同步辐射CT 氮化硅陶瓷 微结构演化 |
| 收稿时间： | 2008-11-27 |
| 修稿时间： | 2008-12-29 |
In Situ Observation of the Microstructure-evolution in Silicon Nitride Ceramics Sintering by Synchrotron Radiation X-ray Computed Tomography |
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| Xu,Feng,Hu,Xiaofang,Zhao,Jianhua,Yuan,Qingxi.In Situ Observation of the Microstructure-evolution in Silicon Nitride Ceramics Sintering by Synchrotron Radiation X-ray Computed Tomography[J].Acta Chimica Sinica,2009,67(11):1205-1210. |
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| Authors: | Xu Feng Hu Xiaofang Zhao Jianhua Yuan Qingxi |
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| Affiliation: | a Key Laboratory of Mechanical Behavior and Design of Materials;Chinese Academy of Sciences;University of Science and Technology of China;Hefei 230026;b Institute of High Energy Physics;Beijing 100039 |
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| Abstract: | Microstructure-evolution of the silicon nitride ceramics sample during sintering process was in-vestigated by a synchrotron radiation X-ray computed tomography(SR-CT) technique.The projection im-ages of the sample were obtained during the sintering process in real-time.2-D and 3-D reconstructed im-ages were obtained by treating the projection images of different sintering periods with filter back projection arithmetic and digital image processing methods.From the reconstructed images,three sintering stages ... |
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| Keywords: | analysis and testing technology of materials sintering synchrotron radiation X-ray computed tomography silicon nitride ceramic microstructure evolution |
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