| 查看: 756 | 回复: 1 | |||
[交流]
通过DMA对氧化陶瓷的相转变和黏弹松弛进行研究 已有1人参与
|
| DMA is commonly used to study modulus and damping behavior of soft materials with relatively low stiffness. In this paper, we demonstrate that Dynamic Mechanical Analyzer (DMA) Q800 can be used as easy and convenient method to study phase transformations and anelastic relaxation in ceramics with high elastic modulus. By measuring storage modulus (stiffness), loss modulus and damping (tan δ) simultaneously using DMA, influence of structural changes caused by phase transformations or anelastic relaxation on mechanical behavior can be studied directly. Doped oxide ceramics, such as 10 mol% Sc2O3 – 1 mol% CeO2 stabilized ZrO2 (ScCeSZ), are excellent solid ionic conductors commonly used as electrolytes in solid oxide fuel cells (SOFCs). Understanding their thermo-mechanical properties is essential for the reliability and durability of SOFCs. In this article, the effect of anelastic relaxation and phase transformation of ScCeSZ on changes in its elastic moduli with temperature were studied using a DMA Q800. Temperature sweep, multi-frequency, constant amplitude and single cantilever set up are used. Two loss modulus peaks are associated with anelastic relaxations of structural defect complexes (i.e. cation-oxygen vacancy dipoles) while the other two are found to be caused by reversible phase transformations. At the same time a sudden drop of storage modulus was observed in the temperature range that corresponds to phase transformations or maximum loss due to anelastic relaxation. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : 通过DMA对氧化陶瓷的相转变和黏弹松弛的研究.pdf
2017-03-02 10:22:16, 295.12 K
» 本帖已获得的红花（最新10朵）
鲤鱼小丸子» 猜你喜欢
师弟论文见刊大半年才想起来申请专利，还能抢救一下吗？
已经有5人回复
-
某top大学教授说“能够在市场中兑现的能力才是真能力”无比同意！
已经有3人回复
-
上海工程技术大学 激光智能制造课题组 2027级博士研究生招生
已经有7人回复
-
售SCI文章，我:8O.5.5.1O.54,科目全,可十急
已经有3人回复
-
售SCI一区T0P文章，我:8O.55.1.O.54,科目全,可伽急
已经有3人回复
-
售SCI一区T0P文章，我:8O.55.1.O.5.4,科目齐全,可+急
已经有3人回复
-
售SCI一区T0P文章，我:8.O.55.1.O54,科目全,可伽急
已经有3人回复
-
售SCI文章，我:8O5.5.1.O.54,科目齐全,可+急
已经有3人回复
-
售SCI一区T0P文章，我:8.O.55.1.O.54,科目齐全,可+急
已经有3人回复
-
售SCI文章，我:8O5.5.1.O.54,科目齐全,可+急
已经有4人回复
我最近也在使用DMA研究功能陶瓷。第一次接触这个仪器，又是陶瓷这种非常脆的材料，因此遇到了很多问题。感谢楼主的分享，希望有机会可以多多交流。 
2楼2019-02-26 09:11:24
