In situ observation of grain evolution in ceramic sintering by SR-CT technique | |
Xu, F; Hu, XF; Niu, Y; Zhao, JH; Yuan, QX; Yuan QX(袁清习) | |
刊名 | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA |
2009 | |
卷号 | 19页码:S684-S688 |
关键词 | sintering grain evolution non-destructive testing synchrotron radiation X-ray computed tomography |
通讯作者 | [Xu Feng ; Hu Xiao-fang ; Niu Yu ; Zhao Jian-hua] Univ Sci & Technol China, Key Lab Mech Behav & Design Mat, Chinese Acad Sci, Hefei 230026, Peoples R China ; [Yuan Qing-xi] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China |
英文摘要 | Grain evolution of boron carbide ceramic powder during isothermal sintering process was in situ investigated by synchrotron radiation X-ray computed tomography (SR-CT) technique. The process of grain growth and material migration during three sintering stages was clearly distinguished from the 2-D and 3-D reconstructed images. The results show that from room temperature to 1 200 degrees C (0-270 min), grains gradually approach each other and form the sintering neck but grain growth does not start, which is indicated as the initial sintering stage. While the sintering time is between 270-390 min (temperature is 1 200 degrees C), material migration between grains starts, while grains and sintering neck grow up, which is defined as the middle sintering stage. As the sintering time exceeds 390 min (temperature is 1 200 degrees C), pores become isolated and spheroidized, which shows the final sintering stage. The double logarithm curve of mean grain radius and time logarithm during middle stage of isothermal sintering process is obtained from reconstructed images and the grain growth exponent is 0.364 03, falling in the predicted range of the traditional sintering theory. The experiment results are in accordance with those of the traditional sintering theory and provide effective experimental data for further analysis of the sintering process and the mechanical characteristics of ceramics. |
学科主题 | Metallurgy & Metallurgical Engineering |
类目[WOS] | Metallurgy & Metallurgical Engineering |
研究领域[WOS] | Metallurgy & Metallurgical Engineering |
原文出处 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000272501300030 |
内容类型 | 期刊论文 |
源URL | [http://ir.ihep.ac.cn/handle/311005/240336] |
专题 | 高能物理研究所_多学科研究中心 |
作者单位 | 中国科学院高能物理研究所 |
推荐引用方式 GB/T 7714 | Xu, F,Hu, XF,Niu, Y,et al. In situ observation of grain evolution in ceramic sintering by SR-CT technique[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2009,19:S684-S688. |
APA | Xu, F,Hu, XF,Niu, Y,Zhao, JH,Yuan, QX,&袁清习.(2009).In situ observation of grain evolution in ceramic sintering by SR-CT technique.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,19,S684-S688. |
MLA | Xu, F,et al."In situ observation of grain evolution in ceramic sintering by SR-CT technique".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 19(2009):S684-S688. |
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