Functionally graded alumina-based thin film systems
Patent
·
OSTI ID:1175892
The present invention provides coating systems that minimize thermal and residual stresses to create a fatigue- and soldering-resistant coating for aluminum die casting dies. The coating systems include at least three layers. The outer layer is an alumina- or boro-carbide-based outer layer that has superior non-wettability characteristics with molten aluminum coupled with oxidation and wear resistance. A functionally-graded intermediate layer or "interlayer" enhances the erosive wear, toughness, and corrosion resistance of the die. A thin adhesion layer of reactive metal is used between the die substrate and the interlayer to increase adhesion of the coating system to the die surface.
- Research Organization:
- Colorado School of Mines, Golden, CO (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC36-00ID13850
- Assignee:
- Colorado School of Mines (Golden, CO)
- Patent Number(s):
- 7,096,921
- Application Number:
- 11/136,613
- OSTI ID:
- 1175892
- Country of Publication:
- United States
- Language:
- English
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