High‐Temperature Compression Deformation Behavior of Fine‐Grained Carbon‐Bonded Alumina
High‐Temperature Compression Deformation Behavior of Fine‐Grained Carbon‐Bonded Alumina
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DOI：
10.1111/jace.14070
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发表时间：
2016-04
影响因子：
3.9
通讯作者：
J. Solarek;C. Bachmann;Yvonne Klemm;C. Aneziris;H. Biermann
中科院分区：
文献类型：
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作者：
J. Solarek;C. Bachmann;Yvonne Klemm;C. Aneziris;H. Biermann
在室温和700°C至1500°C之间的温度下，对残余碳含量为33 wt%的碳键合氧化铝进行了压缩测试，包括准静态测试、蠕变测试和应力松弛测试。因此，采用了一种新的高温试验装置，即惰性气体室和感应加热。通过微观结构和杨氏模量的研究完成了试验。在室温下，第一个加载周期的结果显示出明显的迟滞，在随后的加载周期中几乎完全消失。蠕变试验显示了压缩特征曲线，而发生了初级和次级（平稳）蠕变。在1000°C以上，检测到蠕变速率的强烈增加，而在此温度以下几乎没有观察到蠕变。所有蠕变曲线均采用对数和安德拉德蠕变模型进行近似。在1150℃以上，蠕变活化能为263 kJ/mol。对应力松弛的抵抗在1000 ~ 1200℃之间表现出异常，在1300 ~ 1400℃之间表现出最大值。
Carbon‐bonded alumina with 33 wt% residual carbon was tested in compression at room temperature and at temperatures between 700°C and 1500°C in quasi‐static tests, creep tests, and stress relaxation tests. Therefore, a new high‐temperature test set up with inert gas chamber and inductive heating was used. The tests were accomplished by investigations of microstructure and Young's modulus. At room temperature, the results exhibit a pronounced hysteresis for the first loading cycle, which almost completely disappeared in subsequent cycles. The creep tests showed characteristic curves for compression whereas primary and secondary (stationary) creep occurred. Above 1000°C, a strong increase in creep rate was detected, whereas almost no creep was observed below this temperature. All creep curves were approximated with the models of logarithmic and Andrade creep. The activation energy for creep was found to be 263 kJ/mol above 1150°C. The resistance against stress relaxation showed an anomaly with a minimum between 1000°C to 1200°C and a maximum between 1300°C and 1400°C.