The Reliability of Bonding between Alumina-Pure Metals Through Diffusion Mechanism

Authors

  • Thamir A Jabbar Department of Physics, College of Science, University of Al-Nahrain.
  • Zareh A Sarkis Department of Material Research, Ministry of Sciences and Technology.
  • Arwa G Nagie Department of Physics, College of Science, University of Al-Nahrain.

Keywords:

Bonding, Solid State diffusion, Fracture Surfaces, Dissimilar material

Abstract

Bonding between dissimilar materials such as alumina to metals by diffusion mechanism was investigated in this work. Foils of high purity metals (Silver, Copper, Zinc, Aluminum, Lead and Tin) have been prepared with 1mm thickness and area of 1cm x 1cm. The foils have then be placed between two alumina blocks of similar area and 0.5cm thickness as a sandwich panel. Bonding has been achieved by using a suitable fixing under pressure of 0.3 MPa and then heated to about 90% of the melting point temperature of each investigated metals for 2 hours as a socking time in an atmospheric condition. For evaluation the bonding strength of fabricated joints, tensile test technique was used for this purpose. Three categories of bonding strength were obtained but the upper value of joint strength obtained is 86.5x104Pa of the joint involved silver and tin metals. Obviously three types of fracture surfaces were obtained; fracture in alumina part, fracture in the interface region and fracture in metal part. Fracture surfaces were attempted by NDT (non destructive test) using optical microscope and x-ray techniques. Due to reduction of surface and bulk diffusivity an oxidation layers which covered the contact surfaces was found effected parameters caused to reduce the diffusivity and followed bonding strength of the fabricated joints.

 

Published

2013-09-01

Issue

Section

Articles

How to Cite

(1)
The Reliability of Bonding Between Alumina-Pure Metals Through Diffusion Mechanism. ANJS 2013, 16 (3), 92-97.