In situ observation of ferroelastic domain evolution in a near-morphotropic Pb(Zr,Ti)O 3 ceramic by piezoresponse force microscopy
In situ observation of ferroelastic domain evolution in a near-morphotropic Pb(Zr,Ti)O 3 ceramic by piezoresponse force microscopy
复制标题
通过压电响应力显微镜原位观察近同形 Pb(Zr,Ti)O 3 陶瓷中的铁弹性域演化
DOI：
10.1016/j.jeurceramsoc.2014.11.027
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发表时间：
2015
影响因子：
5.7
通讯作者：
Kim K
中科院分区：
文献类型：
--
作者：
Kim K
利用压电响应力显微镜（PFM）观察了近同型多晶锆钛酸铅陶瓷在压缩载荷下的铁弹畴演化。PFM图像显示了几个演化过程，包括一个不同取向的层片的重叠。使用电子背散射衍射和PFM数据，我们确认，开关过程一般遵循一个主要原则：积极的工作是由外部负载。然而，这可以通过同时发生的能量上有利和不利的过程的组合来发生。证据表明，开关过程显着约束预先存在的域结构，这样的过程主要是一个模式的演变。由于四面体和菱面体相可以共存于材料中，因此对这两种相进行了分析;结果使得在某些情况下可以识别相，前提是切换遵循正功原理。的背景下，铁电/铁弹开关模型的意见进行了讨论。
Ferroelastic domain evolution under compressive loading was observed in a near-morphotropic polycrystalline lead zirconate titanate ceramic using piezoresponse force microscopy (PFM). The PFM images show several evolution processes including overwriting of one lamellation by a differently oriented lamellation. Using electron backscatter diffraction and PFM data, we confirm that switching processes generally follow a primary principle: that positive work is done by external loads. However, this can occur by a combination of energetically favourable and unfavourable processes happening concurrently. The evidence suggests that switching processes are significantly constrained by pre-existing domain structures, such that the process is mainly one of pattern evolution. Since tetragonal and rhombohedral phases can coexist in the material, the analysis was carried out for both phases; the results enable the phase to be identified in some cases, provided that switching follows a positive work principle. The observations are discussed in the context of models of ferroelectric/ferroelastic switching.