Method of producing a pre-alloyed stabilized zirconia powder
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United States of America Patent
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Mar 22, 2005
Grant Date -
Oct 7, 2004
app pub date -
Dec 7, 2001
filing date -
Dec 8, 2000
priority date (Note) -
Expired
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Abstract
A pre-alloyed stabilized zirconia powder suitable for use in thermal barrier applications is formed by alloying zirconia with a stabilizer, such as yttria, and processing the alloyed stabilized zirconia to form a very fine powder. The raw powder is then spray-dried to produce an agglomerated powder having an average particle size suitable for use in spray coating applications. The resulting powder can be used in a thermal-spray application to produce a porous thermal barrier coating having a substantially decreased thermal conductivity when compared to conventional TB coatings, such those produced using plasma-densified powders.
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