Electric charge trapping, residual stresses and properties of ceramics after metal/ceramics bonding
Electric charge trapping, residual stresses and properties of ceramics after metal/ceramics bonding
复制标题
金属/陶瓷键合后陶瓷的电荷俘获、残余应力和性能
DOI：
10.1016/j.jeurceramsoc.2011.10.025
复制
发表时间：
2012
影响因子：
5.7
通讯作者：
D. Tréheux
中科院分区：
文献类型：
--
作者：
M. L. Hattali;N. Mesrati;D. Tréheux
陶瓷元件在电气工程和机械应用中的使用正在迅速增加。这些应用中的大多数需要使用与金属结合的陶瓷。本文研究了工业氧化铝陶瓷（Al_2 O_3）与镍基高温合金连接后产生的残余应力对陶瓷介电性能的影响。用扫描电镜镜效应（SEMME）结合感应电流法（ICM）研究了电荷的捕获-释放或扩散等带电现象。已知陶瓷中的局部俘获电荷是损伤的来源，证明了残余应力强度、陶瓷的表观韧性和在界面附近俘获电荷的能力之间的相关性：界面附近陷阱电荷量的SEMME和ICM测量，强调了陶瓷性能的变化与残余应力，由于两个热，机械效应和陶瓷中金属物质的扩散。
The use of ceramic components in electrical engineering and mechanical applications is rapidly increasing. Most of these applications require the use of ceramics bonded with metal. In this paper, we have studied the role of residual stresses occurring after joining between an industrial alumina ceramic (Al2O3) and Ni-based super-alloy, on the dielectric behaviour of ceramics. The electric charging phenomenon i.e. trapping–detrapping or diffusion of electric charges is studied by Scanning Electron Microscope Mirror Effect (SEMME) coupled with the Induced Current Method (ICM). Knowing that localized trapped charges in ceramics is a source of damage, the correlation between residual stress intensity, apparent-toughness of ceramics and ability to trap charges near the interface was demonstrated: the SEMME and ICM measurements of the quantities of trapped charges near the interface, highlighted the changes in the ceramic properties related to residual stresses due to both thermo-mechanical effect and diffusion of metallic species in the ceramics, during the bonding process.