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首页> 外文期刊>Materials Characterization >Temperature-dependent transformation from whisker- to nanoparticle-strengthened composite interface in the Al2O3/Ag-based alloy system and mechanical properties of the joints
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Temperature-dependent transformation from whisker- to nanoparticle-strengthened composite interface in the Al2O3/Ag-based alloy system and mechanical properties of the joints

机译：Al2O3 / Ag基合金系统中晶须强化到纳米颗粒强化复合界面的温度依赖性转变以及接头的力学性能

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摘要

Al4B2O9-whisker-coated Al2O3 ceramics were bonded by AgCu-4.5 wt%Ti alloy in vacuum. The microstructure of the whisker-coated Al2O3 joints was investigated by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. A continuous (Cu,Al)(3)Ti3O layer formed against the alloy at lower bonding temperatures, and a complex transition zone bordering the whiskers was observed, which consisted of Ag nanoparticles, titanium oxides, TiB2, (Cu,Al)(3)Ti3O nanoparticles and possible Ag3Al. As the bonding temperature increased, the Al2O3/AgCuTi interface was found to transform from whisker- to nanoparticle-strengthened composite region. Bend test results revealed that both the whiskers grown on Al2O3 and the dispersive nanoscale products in the alloy played positive roles in improving the joint properties. The maximum bend strength of the whisker-coated Al2O3 joints was 313 MPa at the bonding temperature of 820 degrees C. (C) 2015 Elsevier Inc. All rights reserved.
机译：Al4B2O9晶须涂层的Al2O3陶瓷在真空中通过AgCu-4.5 wt％Ti合金结合。通过扫描电子显微镜，透射电子显微镜和X射线衍射研究了晶须涂层Al2O3接头的微观结构。在较低的粘结温度下，在合金上形成了连续的（Cu，Al）（3）Ti3O层，并观察到晶须附近的复杂过渡区，该过渡区由Ag纳米颗粒，氧化钛，TiB2，（Cu，Al）（3）组成Ti3O纳米粒子和可能的Ag3Al。随着键合温度的升高，发现Al2O3 / AgCuTi界面从晶须转变为纳米颗粒强化的复合区域。弯曲测试结果表明，在Al2O3上生长的晶须和合金中的分散纳米级产物均在改善接头性能方面发挥了积极作用。晶须涂层的Al2O3接头在820摄氏度的粘结温度下的最大弯曲强度为313 MPa。（C）2015 Elsevier Inc.保留所有权利。

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