Tuan Zaharinie, Tuan Zahari and Huda, Zainul and Ibrahim, Suriani and Yusof, Farazila and Abd Shukor, Mohd Hamdi and Rehan, Mohammad and Ariga, Tadashi (2022) Analysis of the reaction layer formed during Sapphire-Sapphire brazing using a Ag-Cu-Ti filler metal for gas-pressure sensors. ACS Applied Electronic Materials, 4 (5). pp. 2405-2412. ISSN 2637-6113, DOI https://doi.org/10.1021/acsaelm.2c00213.
Full text not available from this repository.Abstract
The present research paper introduces a reliable and economical method for direct brazing using an active Ag-Cu-Ti filler metal that can ensure effective brazing. The sapphire-sapphire brazing process has been conducted at temperatures in the range of 830-900 degrees C for durations in the range of 15-30 min in a high-vacuum (10(-4) Pa) furnace. Material and microstructural characterization involved the use of scanning electron microscope-energy-dispersive system (SEM-EDS) and transmission electron microscope (TEM) for investigating the bonding joint morphologies. Two uniform reaction layers were observed to have formed at the sapphire/brazed area interface. On the sapphire side, the first reaction layer, which was uniform and had a thickness in the range of 0.13-0.17 mu m, was identified as a TiO phase, whereas the second layer was identified as a Cu3Ti3O phase with a thickness in the range of 1.72-2.43 mu m. The uniformity of the Cu3Ti3O phase was found to decrease with increasing brazing temperature and time. Therefore, in this research, a lower brazing temperature and time (830 degrees C/15 min) were chosen so as to avoid bonding degradation.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya (GPF063A-2018), Ministry of Higher Education (MoHE), Malaysia (UM/MOHEUM.C/625/1/HIR/MOHE/H16001-D000001) |
| Uncontrolled Keywords: | Sapphire; Characterization; Joining; Scanning electron microscopy; Transmission electron microscopy |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 15 Sep 2023 02:13 |
| Last Modified: | 15 Sep 2023 02:13 |
| URI: | http://eprints.um.edu.my/id/eprint/42169 |
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