Coated article and method of making
AssigneesGeneral Electric Company, Cleveland State University
InventorsHongyu Wang, Kang Neung Lee
Life of this patent
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Abstract
An article includes a silicon-containing substrate and a modified mullite coating. The modified mullite coating comprises mullite and a modifier component that reduces cracks in the modified mullite coating. The article can further comprise a thermal barrier coating applied to the modified mullite coating. The modified mullite coating functions as a bond coating between the external environmental/thermal barrier coating and the silicon-containing substrate. In a method of forming an article, a silicon-containing substrate is formed and a modified mullite coating is applied. The modified mullite coating comprises mullite and a modifier component that reduces cracks in the modified mullite coating.
Claims16
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises an alkaline earth aluminosilicate.
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises a modifier component of the formula MO.Al2O3.xSiO2, where M is selected from the group consisting of Ca, Sr, and Ba, and 1≦x≦3.
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises barium feldspar (BaO.Al2O3.2SiO2), strontium feldspar (SrO.Al2O3.sSiO2) or a combination of barium feldspar (BaO.Al2O3.2SiO2), and strontium feldspar (SrO.Al2O3.xSiO2).
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises a monoclinic celsian crystalline phase.
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises barium strontium aluminosilicate (BSAS), calcium aluminosilicate (CAS), yttrium silicate (YS) or a combination thereof.
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises an NZP (NaZr2P3O12) modifier.
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises NaZr2P3O12, Ba1.25Zr4P5.5Si0.5O24, Ca0.5Sr0.5Zr4(PO4)6 or Ca0.5Mg0.4Sr4(PO4)6.
An article comprising:
- a silicon-containing substrate;
- and
- a modified mullite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises a calcium aluminate or an aluminum titanate.
An article comprising:
- a silicon-containing substrate;
- and
- a modified muilite coating comprising mullite and a modifier component that reduces cracks in the modified mullite coating, wherein said modifier component comprises 3Ca0.5.5Al2O3, or Al2O3. TiO2.
A coated article comprising a silicon/silicon carbide composite having silicon carbide-containing fibers;
- a modified mullite coating comprising mullite and barium strontium aluminosilicate (BSAS), that reduces cracks in the modified mullite coating;
- and optionally a yttria-stabilized zirconia coating on the modified mullite coating.
Dependencies are inferred from the claim text.