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In situ observation of grain evolution in ceramic sintering by SR-CT technique
  • ISSN号：1003-6326
  • 期刊名称：中国有色金属学会会刊(英文版)
  • 时间：0
  • 页码：S684-S688
  • 语言：中文
  • 分类：TQ174.651[化学工程—陶瓷工业;化学工程—硅酸盐工业]
  • 作者机构：Chinese Academy of Sciences Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China, Institute of High Energy Physics,Chinese Academy of Sciences
  • 相关基金：Projects(10732080, 10872190, 10902108) supported by the National Natural Science Foundation of China;Project supported by Beijing Synchrotron Radiation Facility Foundation(BSRF) Foundation
  • 相关项目：微纳尺度实验力学中的传感、测量、识别新方法研究
作者： Xu Feng|Niu Yu|Zhao Jian-hua|Yuan Qing-xi|Hu Xiao-fang|
关键词： SINTERING, GRAIN, EVOLUTION, NON-DESTRUCTIVE, testing, SYNCHROTRON, radiation, X-ray, COMPUTED, tomography
中文摘要：

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 ℃ (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 ℃), 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 ℃), 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.

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期刊信息
  • 《中国有色金属学报：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国有色金属学会
  • 主编：黄伯云
  • 地址：中国长沙中南大学
  • 邮编：410083
  • 邮箱：f-xsxb@csu.edu.cn
  • 电话：0731-88830949
  • 国际标准刊号：ISSN：1003-6326
  • 国内统一刊号：ISSN：43-1239/TG
  • 邮发代号:42-317
  • 获奖情况:
  • 国家“双百”期刊,第二届全国优秀科技期刊评比二等奖,中国有色金属工业总公司优秀科技期刊一等奖
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  • 被引量:1159