A process model for active brazing of ceramics: Part II Optimization of brazing conditions and joint properties |
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Authors: | T TORVUND Ø GRONG O M AKSELSEN J H ULVENSØEN |
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Affiliation: | (1) Department of Metallurgy, Norwegian University of Science and Technology, N-7034 Trondheim, Norway;(2) SINTEF – Materials Technology, N-7034 Trondheim, Norway |
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Abstract: | In the present investigation, the process model developed in Part I has been applied to evaluate the microstructure and strength
evolution during active brazing of ceramics. As a starting point, reaction-layer growth is assumed to occur isothermally with
no restrictions in the supply of reactive element. Different kinds of diagrams are then constructed to show how specific process
variables (e.g. the heating and cooling period, the limiting layer thickness, and the diffusion mechanism) affect the growth
kinetics. It is concluded that the key to improved joint properties lies in control of the reaction-layer thickness through
optimization of the brazing conditions, and an illustration of this is given.
This revised version was published online in November 2006 with corrections to the Cover Date. |
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