| 摘要 |
A method of forming an abradable coating 8 on a substrate, the method comprising applying an abradable coating to the substrate and then treating a region 10 of the coating to alter its erosion resistance. The coating may comprise an AlSi or McrAlY composition. Preferably the coating is applied by plasma spraying, and then subjected to a laser shock peening process followed by heat treatment with a laser. The treatment may result in a densification of the treated region and/or an increase in the inter-particle bond strength in the treated region. The coating may be applied to a shroud ring (6, figure 1) of a gas turbine engine.
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