Material for plasma spray comprising Y—O—F compound, method for producing the same, and spray coating prepared using the same
AssigneeKomico Ltd.
InventorsKi Won Hong, Dong Hun Jeong, Seong Sik Bang
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Abstract
Disclosed are a material for spray for plasma spray coating having high plasma resistance and a method for producing the same. The material for plasma spray comprises an yttrium compound, and the numbers of moles of Y (yttrium), O (oxygen), and F (fluorine) in the yttrium compound satisfy 1.5<(O+F)/Y<2.0.
Claims5
A material for plasma spray comprising an yttrium compound, wherein the numbers of moles of Y (yttrium), O (oxygen), and F (fluorine) in the yttrium compound satisfy 1.5<(O+F)/Y<2.0,
- wherein the yttrium compound comprises a Y—O—F compound and Y2O3, and
- wherein the Y—O—F compound comprises a first Y—O—F compound with O/F=1 and a second Y—O—F compound with O/F<1, wherein the content of Y2O3 is 15-25 wt %.
A plasma spray coating comprising an yttrium compound, wherein the numbers of moles of Y, O, and F in the yttrium compound satisfy 1.6<(O+F)/Y<1.9 and the porosity of the plasma spray coating is 3% or less,
- wherein the yttrium compound comprises YOF and Y2O3, and
- wherein a content % by weight of Y2O3 is more than a content % by weight of YOF.
Dependencies are inferred from the claim text.