Research of Alumina and Brazing Filler Metal Interface

Ning, Hanwei; Geng, Zhi; Sheng, Ju; Huang, Fuxiang; Han, Zhi Da; Cui, Jing

doi:10.4028/www.scientific.net/msf.423-425.495

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There were many kinds of feasibility to interface reactions between Ag 70.5 Cu 27.5 Ti 2 and Al 2 O 3 . If we want to get high-quality brazing between them, we need know and control the active brazing interface reactions between the main products of Ag 70.5 Cu 27.5 Ti 2 and Al 2 O 3 , for example, TiO 2 , TiO, Cu 2 Ti 4 O and so on [10][11].The brazing reaction between Ti and Al 2 O 3 could be described by Eq.1:…”

Section: Thermodynamics Analysismentioning

confidence: 99%

“…In the real reaction layer, there were Cu 2 Ti 4 O, Ti and AlAg 3 , and the brazing reaction between Al and Ag could be described by Eq.17 [10]:…”

Section: Thermodynamics Analysismentioning

confidence: 99%

“…It was well-known that alumina ceramic played an important role in electronic industry because of its superior physical, chemical, mechanical and optical properties. Titanium as an active metal component of brazing alloys had been used on most occasions [1][2][3][4][5][6][7][8][9][10][11]; and Ag-Cu alloy eutectic filler metal owned the advantages of low braze temperature, low stress and simply process; So Ag-Cu-Ti alloy metal were popularly used active brazing metal.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Interface Reaction Thermodynamics of AgCuTi Brazing Filler Metal and Alumina Ceramic

Ning

Lan

Wang

et al. 2014

AMR

Self Cite

View full text Add to dashboard Cite

In this work, the interface reaction between Al2O3 ceramic and Ag70.5Cu27.5Ti2 brazing filler metal at 845-860°C was investigated. Based on the data of thermodynamics and kinetics, the Gibbs free energies of the main interface reactions in the real brazing system condition were calculated. But the values of normal equilibrium reaction condition and the real interface reaction brazing system were different; and the main influential factor was the brazing temperature, and the system vacuum of brazing condition can lead the change of equilibrium constant (Kα). The results revealed that the high temperature and vacuum active brazing is a non-equilibrium interface reaction especially to titanium alloy, the vacuum and alloy liquid solution are beneficial to the brazing process, and the by-product formation of titanium-oxygen are affected by the diffusion process.

show abstract

Section: Thermodynamics Analysismentioning

confidence: 99%

“…In the real reaction layer, there were Cu 2 Ti 4 O, Ti and AlAg 3 , and the brazing reaction between Al and Ag could be described by Eq.17 [10]:…”

Section: Thermodynamics Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interface Reaction Thermodynamics of AgCuTi Brazing Filler Metal and Alumina Ceramic

Ning

Lan

Wang

et al. 2014

AMR

Self Cite

View full text Add to dashboard Cite

show abstract

“…Its applications include windows for high-pressure optical cells and pressure devices [12]. Sapphire has been bonded to other materials like metals [13], including gold and silver [14], and alloys Inconel Ò through a Cu/Ni interlayer [12]. In our previous works, two sapphire substrates were laser-welded through a 50-nm titanium thin film [15], as well as through glass thin films [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Laser-Welded Steel Foils with Sapphire Substrates

Pablos-Martín

Große

Cismak

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

A nanosecond pulsed laser was used to weld stainless steel foils of 10 lm thickness to the sapphire substrates. The microstructure of the bonded interface was studied. Both materials were partially ablated under the influence of the laser beam. An inhomogeneous distribution of the steel and sapphire along the bonded interface is observed. The electrical resistance of the steel foil was measured before and after laser welding, showing that the weld slightly increases the electrical resistance but still keeps the values acceptable for electrical contacts

show abstract

Fabrication of Reliable Joints of Alumina Ceramics by Microwave-Assisted Reactive Brazing Technique

et al. 2016

View full text Add to dashboard Cite

Microwave-assisted reactive brazing technique was utilized for joining of alumina ceramics at 950°C and 1050°C for 20 min in argon atmosphere using .5Ti in mass%) paste as the braze alloy. Conventional heating technique was also employed for comparison purpose only. The microwave and conventionally brazed joints were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis and Vickers microhardness measurement. X-ray diffraction data showed that the Ti-based compounds were formed at the substrate-filler alloy interfaces of the microwave and conventionally brazed joints. Scanning electron microscopy exhibited the formation of thicker reaction region in the case of joints microwave brazed at higher temperature. Energy dispersive X-ray analysis determined the elemental compositions across the joint cross-section. Vickers microhardness measurements indicated more reliable performance of the joints microwave brazed at lower temperature. Hermiticity of the microwave and conventionally brazed joints was evaluated by Helium leak test and found to be acceptable for actual applications.

show abstract

Research of Alumina and Brazing Filler Metal Interface

Cited by 3 publications

References 0 publications

Interface Reaction Thermodynamics of AgCuTi Brazing Filler Metal and Alumina Ceramic

Interface Reaction Thermodynamics of AgCuTi Brazing Filler Metal and Alumina Ceramic

Laser-Welded Steel Foils with Sapphire Substrates

Fabrication of Reliable Joints of Alumina Ceramics by Microwave-Assisted Reactive Brazing Technique

Contact Info

Product

Resources

About