Paper Title:
A Research on Interfacial Reaction of Brazing Joint of Alumina Ceramics to Metals
  Abstract

Brazing with active filler alloys containing some active elements, which promotes wetting of ceramics surfaces, is one of the most widely methods for joining ceramics to metals. The joints formed by brazing A12O3 to metal by using copper-titanium-nickel (Cu-Ti-Ni) as brazing filler were investigated. The metals/ceramics joints were produced at a vacuum level of 10-2-10-3 Pa at 1273K, using a constant holding time of 10 min. The surfaces were studied both morphologically and structurally using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction analysis (XRD). In the brazing process, copper and titanium in the braze alloy form a series of reaction products. The formation of Ti3Cu3O and Ti2Ni at the interface is characteristic of these joints. The estimated free energies of formation of the Ti3Cu3O and Ti2Ni are -119kcal/mol and -245.92 kJ ~-263.78kJ/mol at 1200~1288K respectively. The highly negative values for the free energies of formation suggest that these compounds are thermodynamically stable.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
2732-2734
DOI
10.4028/www.scientific.net/MSF.654-656.2732
Citation
X. D. Ma, X. Y. Wang, J. W. Li, S. Z. Wei, "A Research on Interfacial Reaction of Brazing Joint of Alumina Ceramics to Metals", Materials Science Forum, Vols. 654-656, pp. 2732-2734, 2010
Online since
June 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hong Tao Zhang, Jian Cao, Hao Lu
Abstract:Joining Cu to Al has been carried out by vacuum contact reactive brazing without filler metal. Experimental results obtained showed that the...
3891
Authors: Jie Zhang, Yan Ming He
Abstract:Mo particles have been introduced into Ag-Cu-Ti brazing alloy for the joining of Si3N4 ceramic. Effects of Ti content on microstructure and...
2018
Authors: M. Swathi Kiranmayee, Abhay Kumar Jha, Sushant K. Manwatkar, D.P. Sudhakar, P. Ramesh Narayanan, K. Sreekumar, Parameshwar Prasad Sinha
Chapter 8: Materials Joining
Abstract:Copper to stainless steel brazed components are used in the thrust chamber of cryogenic propulsion system of Indian Space Programme....
650
Authors: Jia Ke Li, Xin Liu, Jian Er Zhou
Chapter 1: Novel Processing and Manufacturing
Abstract:C/C composite and TC4 alloy were successfully brazed using 70Ag28Cu2Ti (wt. %) as filler metal at brazing temperature 820 º°C~920 °C for...
415
Authors: Jia Ke Li, Xiu Liu, Jian Er Zhou
Chapter 2: Chemical Composition and Microstructure
Abstract:C/SiC composite and TC4 alloy were successfully brazed using 70Ag28Cu2Ti (wt. %) as filler metal at 820 °C~920 °C for 5 min ~30 min. The...
167