| 摘要 |
A system for bonding layers ( 1 ) of different chemical compositions, such as bonding a thermal barrier layer to a metal substrate on a surface of a gas turbine component. A substrate ( 4 ) made either of a ceramic material or particularly of a metal super-alloy may be bonded to an outer layer ( 16 ) such as a ceramic by means of a fine-grained intermediate layer ( 7 ) bonded to the substrate ( 4 ), and a coarse-grained layer ( 10 ) bonded to the intermediate layer ( 7 ) to create a studded surface ( 9 ). The fine and coarse layers ( 7, 10 ) provide a transition between the substrate ( 4 ) and the outer layer ( 16 ) for improved bonding between them. The studded surface ( 9 ) may provide at least a 20% increase in bonding surface area for the outer layer ( 16 ). Additionally, a medium-grained layer ( 13 ) may be applied to the studded surface ( 9 ) before applying the outer layer( 16 ).
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