【Key words】 Ferroelectric material； Environment； Indentation crack； Domain switching； Stress corrosion cracking；
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For example, the combined effect of applied stress and electric field on crack propagation has been investigated using Vickers indentation crack.
利用压痕裂纹研究了应力和电场对PZT陶瓷裂纹扩展的耦合作用。
参考来源 - 铁电材料压痕裂纹的开裂与环境开裂After etched and protected,the indentation crack is made up,and strength is recovered or heightened.
利用酸腐蚀消除或钝化玻璃表面的压痕裂纹，并对新鲜表面及时进行保护，玻璃的强度将得到恢复，并有一定提高。
参考来源 - 玻璃表面微缺陷与离子交换表面改性的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The propagation process of indentation crack in air of different relative humidity(2%, 30%, 98%) for a poled PZT-5 ferroelectric ceramic was investigated.
在不同湿度（2%、30%、98%）的空气中，研究了极化的锆钛酸铅（PZT-5）铁电陶瓷压痕裂纹在残余应力、电场作用下的滞后扩展。
Domain switching and propagation of an unloaded indentation crack for BaTiO_3 single crystal under residual stress and applied stress in humid air and water have been in situ investigated.
原位研究了残余应力和外加应力导致BaTiO_3单晶压痕裂纹在湿空气和水中的滞后扩展及畴变。
The method of toughness test such as Direct Crack Measurement and Indentation Strength by Bending etc. Are also introduced.
介绍了直接压痕法、弯曲压痕强度法等几种韧性测试方法。
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