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Wetting Behavior of the Ag-5CuO Brazing Alloy on ZTA Composite Ceramic with/without CuO Coating in Air
| Content Provider | MDPI |
|---|---|
| Author | Feng, Guangjie Liu, Manqin Liu, Yalei Jin, Zhouxin Wang, Yifeng Deng, Dean |
| Copyright Year | 2021 |
| Description | The wetting of Ag-5 wt.% CuO (Ag-5CuO) alloy on initial/CuO-coated zirconia toughened alumina (ZTA) composite ceramic in air was studied in detail. The results showed that the contact angle of the Ag-5CuO/ZTA system rapidly decreased from 81° at 970 °C to 45° at 990 °C during the heating process, however, moderate reductions in contact angle were observed in the subsequent heating and temperature holding stages. In comparison with the contact angle of pure $Al_{2}O_{3}$, an increment of about 4° of the stable contact angle of Ag-5CuO alloy on the heterogeneous ZTA was observed. The reaction between $Al_{2}O_{3}$ and CuO can reduce the damage of the CuO-rich liquid to $ZrO_{2}$ in the ZTA substrate. Both oxygen and CuO were helpful in reducing the contact angle of Ag on ZTA and enhancing the bonding of the Ag/ZTA interface. The continuous CuO coating on ZTA and the monotectic liquid containing more CuO in the region near the triple line induced reductions of more than 40° and about 10° in the contact angle, respectively, between the initial and the CuO coating-improved wetting systems. |
| Starting Page | 609 |
| e-ISSN | 20734352 |
| DOI | 10.3390/cryst11060609 |
| Journal | Crystals |
| Issue Number | 6 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-05-28 |
| Access Restriction | Open |
| Subject Keyword | Crystals Ceramics Wetting Silver-based Alloy Zta Composite Ceramic Contact Angle Microstructure |
| Content Type | Text |
| Resource Type | Article |
