Abstract
The transient liquid phase (TLP) joining of an aluminum 6061-SiC composite using a gallium interface has been investigated. The observed kinetics of this process suggest that diffusion occurs along interphase and subgrain boundaries at low temperatures (<723 K). An existing TLP model has been modified to account for this behavior.
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Abbreviations
- C :
-
binary solute concentration
- C β :
-
solute concentration in original predeposited film
- t :
-
time coordinate
- Dl, Ds:
-
solute diffusivity in liquid and solid
- h o :
-
half-thickness of original predeposited solute film
- ξ :
-
position of solid/liquid interface (x direction)
- γ :
-
growth constant
- C lα :
-
solute concentration at α liquidus
- C αl :
-
solute concentration at α solidus
- D app :
-
apparent solute diffusivity
- h exp :
-
location of experimentally observed slope change on semilog plots
- h,theo:
-
location of theoretically predicted slope change on semilog plots
- τ :
-
liquid residence time
- σ :
-
thickness of liquid film at grain boundaries
- x, y :
-
Cartesian coordinates
- h 1 h 2 :
-
maximum penetration distance (x direction)
- h 3 :
-
for stages 1 through 3
- t1, t2, t3:
-
time required to complete stages 1 through 3
- X l :
-
volume fraction of liquid phase
- I :
-
excess solute content
- Jx, Jy:
-
flux of solute inx andy directions
- D :
-
interdiffusion coefficient┐
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Sabathier, V., Edwards, G.R. & Cross, C.E. Kinetic study of low-temperature transient liquid phase joining of an aluminum-sic composite. Metall Mater Trans A 25, 2705–2714 (1994). https://doi.org/10.1007/BF02649223
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DOI: https://doi.org/10.1007/BF02649223