Thermal spray of doped thermal barrier coating material
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United States of America Patent
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Issued Date -
Jan 6, 2005
app pub date -
Jun 3, 2004
filing date -
Jun 18, 2003
priority date (Note) -
Abandoned
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Abstract
A yttria stabilized zirconia ceramic thermal barrier coating (24) is applied to a substrate (22) using an oxy-acetylene spraying process by including in the coating a eutectic phase having a melting temperature sufficiently low to cause melting of the eutectic phase during the oxy-acetylene spraying process. The eutectic phase may be present in the powder (12) used for the spraying process, or it may be formed during the spraying process by the oxidation of a layer of metal applied to yttria stabilized zirconia particles. The use of an oxy-acetylene spraying process facilitates the application of the coating during in-frame repair of a gas turbine component.
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