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FUNCTIONALLY GRADED ALUMINA-BASED THIN FILM SYSTEMS
FUNCTIONALLY GRADED ALUMINA-BASED THIN FILM SYSTEMS
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机译:功能梯度铝基薄膜系统
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摘要
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.
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