Abstract
Bare α-alumina ceramics were directly bonded together in air through ultrasonic-assisted joining by pure aluminum filler within seconds. It was found that rapid wetting through in-situ reaction of elemental aluminum and oxygen, undercutting of the melted aluminum on ceramic surfaces, and large scale growth of fresh nano-sized alumina particles probably combined successively during the joining, attributing to the acoustic cavitation, the streaming and the micro-jetting by ultrasound effects. Ceramic-composed joints were successfully obtained with fracture strength of 101.5 MPa within 90 s at as low as 973 K.
| Original language | English |
|---|---|
| Pages (from-to) | 4339-4344 |
| Number of pages | 6 |
| Journal | Journal of the European Ceramic Society |
| Volume | 36 |
| Issue number | 16 |
| DOIs | |
| State | Published - 1 Dec 2016 |
| Externally published | Yes |
Keywords
- Mechanical property
- Microstructure
- Ultrasonic-assisted joining
- Wetting
- α-Alumina ceramics
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