Method of densifying plasma-resistant coating layer
A method of densifying a plasma-resistant coating layer includes applying a fluorocarbon material including C x H y F z (where x and z are each independently a real number greater than 0, and y is an integer greater than or equal to 0) to a surface of a base material having a surface including Y a O b (where a and b are each independently a real number greater than 0) to form a fluorocarbon coated base material, and projecting a pulsed laser beam onto a region of the fluorocarbon coated base material to form a coating layer over the base material, in which coating layer yttrium (Y) and fluorine (F) are bonded together, wherein the coating layer is formed by a laser sintering process occurring by projecting the pulsed laser beam.
1 . A method of densifying a plasma-resistant coating layer, the method comprising:
applying a fluorocarbon material represented by Formula 2 to a surface of a base material comprising a surface represented by Formula 1 to form a fluorocarbon coated base material; and
projecting laser beam onto a region of the fluorocarbon coated base material, to form a coating layer over the base material, in which coating layer yttrium (Y) and fluorine (F) are bonded together, wherein the coating layer is formed by a laser sintering process occurring by projecting the laser beam,
where a and b are each independently a real number greater than 0,
where x and z are each independently a real number greater than 0, and y is a real number greater than or equal to 0.
2 . The method of claim 1 , wherein the coating layer over the base material entirely covers the surface of the base material.
3 . The method of claim 1 , wherein the fluorocarbon material applied to the surface of the base material has a thickness of 1 nm or more.
4 . The method of claim 1 , wherein, the laser beam is a pulsed laser beam and when the pulsed laser beam is projected, the pulsed laser beam has an instantaneous temperature of 500° C. to 2,000° C.
5 . The method of claim 1 , wherein energy generated by the laser beam reaches the surface of the base material through the region of the base material to which the fluorocarbon material is applied.
6 . The method of claim 1 , wherein, when the laser beam is projected, a carbon material included in the fluorocarbon material forms a restructured carbon material in a gaseous state or a particle state.
7 . The method of claim 6 , wherein the restructured carbon material is removed through an exhaust system.
8 . The method of claim 1 , wherein the surface of the base material comprises Y 2 O 3 , and the coating layer over the base material comprises YOF.
9 . The method of claim 1 , wherein the applying of the fluorocarbon material is performed through at least one process selected from the group consisting of a chemical vapor deposition (CVD) process using plasma, an application process using a spray, and a thermal deposition process.
10 . The method of claim 1 , further comprising removing byproducts generated during the laser sintering process by performing a blowing process using nitrogen gas or carbon dioxide gas, or by an ultrasonic cleaning process.
11 . The method of claim 1 , wherein an average misorientation angle between sub-grains in an yttrium oxide coating surface included in the surface of the base material is greater after the laser sintering process than before the laser sintering process.
12 . The method of claim 11 , wherein the sub-grains in the yttrium oxide coating surface included in the surface of the base material have an average size not greater than 0.8 μm after the laser sintering process.
13 . A method of densifying a plasma-resistant coating layer, the method comprising:
forming a fluorocarbon deposition layer that covers a surface of a base material comprising an yttrium oxide coating;
irradiating the fluorocarbon deposition layer with a laser beam to destroy a fluorocarbon structure included in the fluorocarbon deposition layer; and
forming a YOF coating layer on the surface of the base material from fluorine (F) generated from the destroyed fluorocarbon structure.
14 . The method of claim 13 , wherein the irradiating of the fluorocarbon deposition layer with the laser beam is performed in a gas environment comprising at least one gas selected from the group consisting of CF 4 , CHF 3 , NF 3 , and F.
15 . The method of claim 14 , wherein the gas environment comprising at least one gas selected from the group consisting of CF 4 , CHF 3 , NF 3 , and F, further comprises at least one gas selected from the group consisting of argon gas, helium gas, nitrogen gas, oxygen gas, hydrogen gas, and combinations thereof.
16 . The method of claim 14 , wherein the irradiating of the fluorocarbon deposition layer with the laser beam is performed simultaneously with the forming of the YOF coating layer.
17 . The method of claim 13 , wherein the YOF coating layer entirely covers the surface of the base material.
18 . The method of claim 13 , wherein an average misorientation angle between sub-grains in a surface of an yttrium oxide material, which is included in the surface of the base material after the YOF coating layer is formed is greater after a laser sintering process than before the laser sintering process.
19 . The method of claim 13 , wherein carbon generated from the destroyed fluorocarbon structure is removed through an exhaust system.
20 . A method of densifying a plasma-resistant coating layer, the method comprising:
forming a fluorocarbon deposition layer that has a thickness of 1 nm or greater and entirely covers a surface of a base material, the surface of the base material comprising an yttrium oxide coating;
irradiating the fluorocarbon deposition layer with a pulsed laser beam having an instantaneous temperature of 500° C. to 2,000° C.; and
forming a YOF coating layer on the surface of the base material by fluorine material included in the fluorocarbon deposition layer reacting with an yttrium oxide material included in the surface of the base material while removing a carbon material included in the fluorocarbon deposition layer through an exhaust system,
wherein the YOF coating layer entirely covers the surface of the base material, and
wherein an average misorientation angle between sub-grains in a surface of the yttrium oxide material, which is included in the surface of the base material before and after the irradiating of the fluorocarbon deposition layer with the pulsed laser beam, is increased after the irradiating of the fluorocarbon deposition layer with the pulsed laser beam than before irradiating the fluorocarbon deposition layer.