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Title: Spreading and interlayer formation at the copper-copper oxides/polycrystalline alumina interface

Abstract

Spreadability and reaction layer growth rates of copper-oxygen alloys on polycrystalline alumina were measured above the melting point of copper to better understand the direct bonding process. Spreading was measured as a function of composition and temperature by monitoring the diameter of molten droplets as a function of time. As the oxygen content of the melt increased from 0 to 3 wt pct, the spreading diameter increased linearly, at fixed time and temperature. Constant diameters were observed for oxygen compositions between approximately 3 and 6 wt pct. The diameters again increased linearly for oxygen concentrations greater than 7 wt pct. This behavior was explained by reference to the copper-oxygen binary phase equilibrium. An interfacial product was identified to be the complex oxide, CuAlO[sub 2]. A detailed investigation of the interlayer growth kinetics was performed to understand the fundamental phenomena controlling the spreading rates. The growth rate of the CuAlO[sub 2] phase and the spreading rate were simultaneously measured for alumina in contact with a copper-2 wt pct oxygen alloy drop as a function of temperature. The reaction layer thickening was found to be diffusion controlled, with an apparent activation energy of 309 kJ/mol, and the spreading rate did not correlatemore » with the thickening rate.« less

Authors:
 [1]; ;  [2]
  1. Sandia National Labs., Albuquerque, NM (United States). Liquid Metal Processing Lab.
  2. Center for Welding and Joining Research, Golden, CO (United States). Dept. of Metallurgical and Materials Engineering
Publication Date:
OSTI Identifier:
6996603
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)
Additional Journal Information:
Journal Volume: 25:11; Journal ID: ISSN 0360-2133
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; BONDING; INTERFACES; COMPOSITE MATERIALS; COPPER ALLOYS; PHASE STUDIES; COPPER OXIDES; MICROSTRUCTURE; OXYGEN ADDITIONS; TEMPERATURE DEPENDENCE; WETTABILITY; ALLOYS; ALUMINIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; FABRICATION; JOINING; MATERIALS; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360601* - Other Materials- Preparation & Manufacture; 360602 - Other Materials- Structure & Phase Studies

Citation Formats

Baldwin, M D, Chidambaram, P R, and Edwards, G R. Spreading and interlayer formation at the copper-copper oxides/polycrystalline alumina interface. United States: N. p., 1994. Web. doi:10.1007/BF02648869.
Baldwin, M D, Chidambaram, P R, & Edwards, G R. Spreading and interlayer formation at the copper-copper oxides/polycrystalline alumina interface. United States. https://doi.org/10.1007/BF02648869
Baldwin, M D, Chidambaram, P R, and Edwards, G R. 1994. "Spreading and interlayer formation at the copper-copper oxides/polycrystalline alumina interface". United States. https://doi.org/10.1007/BF02648869.
@article{osti_6996603,
title = {Spreading and interlayer formation at the copper-copper oxides/polycrystalline alumina interface},
author = {Baldwin, M D and Chidambaram, P R and Edwards, G R},
abstractNote = {Spreadability and reaction layer growth rates of copper-oxygen alloys on polycrystalline alumina were measured above the melting point of copper to better understand the direct bonding process. Spreading was measured as a function of composition and temperature by monitoring the diameter of molten droplets as a function of time. As the oxygen content of the melt increased from 0 to 3 wt pct, the spreading diameter increased linearly, at fixed time and temperature. Constant diameters were observed for oxygen compositions between approximately 3 and 6 wt pct. The diameters again increased linearly for oxygen concentrations greater than 7 wt pct. This behavior was explained by reference to the copper-oxygen binary phase equilibrium. An interfacial product was identified to be the complex oxide, CuAlO[sub 2]. A detailed investigation of the interlayer growth kinetics was performed to understand the fundamental phenomena controlling the spreading rates. The growth rate of the CuAlO[sub 2] phase and the spreading rate were simultaneously measured for alumina in contact with a copper-2 wt pct oxygen alloy drop as a function of temperature. The reaction layer thickening was found to be diffusion controlled, with an apparent activation energy of 309 kJ/mol, and the spreading rate did not correlate with the thickening rate.},
doi = {10.1007/BF02648869},
url = {https://www.osti.gov/biblio/6996603}, journal = {Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)},
issn = {0360-2133},
number = ,
volume = 25:11,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 1994},
month = {Tue Nov 01 00:00:00 EST 1994}
}