WO2015115624A1 - 筒体、プラズマ装置、ガスレーザー装置、および筒体の製造方法 - Google Patents
筒体、プラズマ装置、ガスレーザー装置、および筒体の製造方法 Download PDFInfo
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- WO2015115624A1 WO2015115624A1 PCT/JP2015/052768 JP2015052768W WO2015115624A1 WO 2015115624 A1 WO2015115624 A1 WO 2015115624A1 JP 2015052768 W JP2015052768 W JP 2015052768W WO 2015115624 A1 WO2015115624 A1 WO 2015115624A1
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- cylinder
- cylindrical body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/032—Constructional details of gas laser discharge tubes for confinement of the discharge, e.g. by special features of the discharge constricting tube
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/0305—Selection of materials for the tube or the coatings thereon
Definitions
- the present invention relates to a cylinder, a plasma apparatus, a gas laser apparatus, and a cylinder manufacturing method.
- a gas laser device that oscillates a gas laser is widely used.
- a gas laser tube which is a cylindrical tube, is provided with a rare gas such as helium-neon (He—Ne) gas or argon (Ar) gas, and carbon dioxide (CO 2 gas).
- a rare gas plasma is generated in the pipe.
- carbon dioxide molecules (CO 2 molecules) are excited by the energy of the plasma, so that light of a specific wavelength is emitted from the carbon dioxide molecules (CO 2 molecules).
- a material used for such a gas laser tube it is required to have high hermeticity and high permeability of high-frequency power for generating plasma. For example, materials such as quartz glass are widely used.
- Plasma has high physical energy and high chemical reactivity because charged particles such as electrons and ions, excited molecules and atoms react with each other while moving in a complex manner.
- the inner surface of the gas laser tube exposed to plasma is susceptible to physical damage due to the energy of the exposed plasma, and is also susceptible to changes due to chemical reactions (hereinafter, physical damage and chemical changes). Collectively expressed as corrosion).
- the corrosion of the laser tube due to the plasma has been a cause of reducing the service life of the gas laser tube and thus the durability of the gas laser device.
- Patent Document 1 proposes a configuration for suppressing the corrosion of a laser tube due to plasma.
- Patent Document 1 below proposes a structure in which a protective layer made of a metal such as tungsten or molybdenum, boron carbide, or the like is formed on the inner peripheral surface of a laser tube body made of, for example, aluminum nitride.
- a protective film is formed by an ion plating method, a CVD method, or the like.
- a protective film formed by a general film forming method such as an ion plating method or a CVD method is a relatively strong and dense film.
- Such a protective film has a problem that the protective film itself has high plasma resistance, but cracks, cracks, and the like are likely to occur due to a temperature change accompanying plasma generation.
- a first cylindrical body whose inner surface is exposed; and a second cylindrical body mainly composed of alumina bonded to the outer surface of the first cylindrical body, wherein the first cylindrical body includes an oxide containing yttrium.
- the main component The main component.
- a plasma device comprising the above-described cylinder and an electrode for generating plasma in the internal space of the cylinder.
- the above plasma apparatus and gas supply means for supplying a laser oscillation gas to the internal space of the plasma apparatus, and plasma is generated by the electrode in a state where the laser oscillation gas is supplied to the internal space A gas laser device that generates laser light is provided.
- a step of preparing a rod-shaped core a step of spraying an oxide containing yttrium on the outer surface of the core to form a first cylinder, and an alumina on the outer surface of the first cylinder Spraying and forming a second cylinder mainly composed of alumina bonded to the outer surface of the first cylinder, and an assembly of the first cylinder and the second cylinder.
- a cylindrical body having high plasma resistance can be manufactured in a short time and at a relatively low cost.
- FIG. 2 is an enlarged sectional view of a part of the laser tube shown in FIG. 1. It is sectional drawing of one Embodiment of the gas laser apparatus comprised including the laser tube shown in FIG. 1 and FIG. (A)-(d) is sectional drawing which shows one Embodiment of the manufacturing method of a cylinder.
- FIG. 1 is a view showing a laser tube 10 which is an embodiment of a cylindrical body.
- FIG. 1A is a perspective view of the laser tube 10, and FIG.
- the laser tube 10 includes a first cylindrical body 14 with an inner surface 14A exposed, and a second cylindrical body 12 mainly composed of alumina bonded to the outer surface 14B of the first cylindrical body 14, and the first cylindrical body.
- 14 is mainly composed of an oxide containing yttrium.
- the first cylinder 14 includes, for example, yttria (Y 2 O 3 ), which is an oxide containing yttrium, as a main component. “Included as a main component” means that the content is 50% by mass or more. It is preferable that the 1st cylinder 14 and the 2nd cylinder 12 contain 90 mass% or more of a main component.
- each component constituting each member is determined by using an X-ray diffractometer (XRD) and then identifying the component, and then using an X-ray fluorescence analyzer (XRF) or an ICP emission spectroscopy analyzer (ICP).
- the content of the element may be obtained by using the calculated content and converted to the content of the identified component.
- the first cylindrical body 14 may contain other components such as oxides of Ti, Al, Si and the like in a range having sufficient plasma resistance in addition to the oxide containing yttrium. It is preferable to contain 90% by mass or more of an oxide containing yttrium in order to further increase the corrosion resistance against plasma.
- the second cylindrical body 12 may contain other components such as zirconia (ZrO 2 ) in addition to alumina within a range in which sufficient mechanical strength can be ensured. It is preferable that 90 mass% or more of alumina is included in the point which forms the 2nd cylinder 12 stably.
- ZrO 2 zirconia
- the oxide containing yttrium is not limited to yttria (Y 2 O 3 ), and other elements such as aluminum (Al) such as yttrium aluminum garnet (YAG: Y 3 Al 5 O 12 :). And a complex oxide containing yttrium (Y).
- Al aluminum
- Al aluminum
- YAG Y 3 Al 5 O 12 :
- Y yttrium
- a composite oxide of yttrium and aluminum such as YAM (2Y 2 O 3 .Al 2 O 3 ) or YAP (Y 2 O 3 .Al 2 O 3 ) may be used.
- These oxides may be a simple substance, or a plurality of types of oxides may be mixed. These oxides containing yttrium have high corrosion resistance against plasma.
- the laser tube 10 of the present embodiment is a cylindrical member having a pipe line 11 surrounded by the inner surface of the first cylinder 14, and helium-neon (He—Ne) gas or A rare gas such as argon (Ar) gas and carbon dioxide gas (CO 2 gas), for example, are enclosed, and plasma of the rare gas is generated in the pipe to excite carbon dioxide molecules (CO 2 molecules). Used to emit light of a specific wavelength.
- Oxide containing yttrium has high corrosion resistance against plasma, and alumina has high mechanical strength and high thermal conductivity.
- the first tube 14 is made of oxide containing yttrium
- the second tube 12 is made mainly of alumina.
- the laser tube 10 has high corrosion resistance against plasma, high mechanical strength, and high heat dissipation. high.
- the first cylinder 14 is formed by a thermal spraying method
- the second cylinder 12 is also formed by a thermal spraying method.
- the 1st cylinder 14 and the 2nd cylinder 12 are firmly joined by comparatively high intensity
- FIG. 2 is an enlarged sectional view showing a part of the laser tube 10.
- a melted material is sprayed as fine particles onto the surface of the film formation target from the nozzle of the thermal spraying apparatus to be solidified and deposited on the surface of the film formation target.
- the surface state and temperature of the sprayed film also change, and the direction and density of the array of fine particles 12a and 14a also change. Go. In combination with such fluctuations, a gap S is formed between the solidified and deposited flat particles 12a and 14a.
- each fine particle 14a is also a sprayed film, and even when the rare gas plasma is generated in the pipe line 11 and the second cylinder 12 is heated with the heating of the first cylinder 14, each fine particle.
- the internal stress in the second cylinder 12 due to the thermal expansion of 12a is reduced, and the deterioration of the second cylinder 12 due to the stress caused by the thermal expansion is small. Moreover, the stress resulting from the difference in the thermal expansion coefficient of the 1st cylinder 14 and the 2nd cylinder 12 is relieved similarly. As described above, in the laser tube 10, deterioration due to thermal expansion accompanying generation of plasma is suppressed.
- the 1st cylinder 14 is formed by the thermal spraying method, and when the 2nd cylinder 12 is also formed by the thermal spraying method, that is, the outer surface 14B of the 1st cylindrical body 14 formed by the thermal spraying is sprayed.
- the second cylinder 12 is constituted by the yttria fine particles 14 a constituting the first cylinder 14 at the boundary portion between the first cylinder 14 and the second cylinder 12.
- the alumina fine particles 12a collide with each other to bond and grow the particles, and the fine particles 12a of the second cylindrical body 12 enter the gap S portion between the fine particles 14a.
- the fine particle 14a and the fine particle 12a are mixed, and it has couple
- the first cylinder 14 and the second cylinder 12 are firmly joined with a relatively high strength.
- the thickness of the 1st cylinder 14 is 0.5 mm or more and 1 mm or less, the thickness of the 2nd cylinder 12 is 2.6 mm or more and 3.6 mm or less, and the thickness of the 2nd cylinder 12 is the 1st cylinder 14 It is larger than the thickness.
- Alumina constituting the second cylinder 12 has a relatively high mechanical strength and a relatively high thermal conductivity. Since the thickness of the second tube 12 is relatively large in the laser tube 10, the mechanical strength of the entire laser tube 10 is relatively high, and the heat dissipation is also relatively high.
- the arithmetic average roughness (Ra) of the inner surface of the first cylinder 14 is about 0.4 to 1.6 ⁇ m, and the arithmetic average roughness (Ra) of the outer surface 12B of the second cylinder 12 is about
- the arithmetic average roughness (Ra) of the inner surface of the first cylinder 14 is smaller than the arithmetic average roughness (Ra) of the outer surface 12B of the second cylinder 12.
- the surface area of the inner peripheral surface 14A that is, the inflow area of the plasma heat, is relatively small. It is hard to rise.
- the surface area of the outer surface 12B of the second cylinder 12 is relatively large, thereby causing, for example, plasma generated in the pipe 11 Thermal energy can be efficiently radiated from the outer peripheral surface 12B, and the temperature rise of the first cylinder 14 and the second cylinder 12 can be suppressed.
- the first cylindrical body 14 is formed by thermal spraying and the arithmetic average roughness (Ra) of the inner surface of the first cylindrical body 14 is small, there are few fine particles 14A protruding partially on the inner peripheral surface 14A. Therefore, the dropping of the fine particles 14a from the inner peripheral surface 14A is suppressed, and even when the plasma is repeatedly generated, the cleanliness inside the gas laser tube 10 can be kept high.
- the open pore area ratio of the inner surface 14 ⁇ / b> A of the first cylinder 14 is smaller than the open pore area ratio of the outer surface 12 ⁇ / b> B of the second cylinder 12.
- the open pore area ratio refers to the ratio of the total area of open pores excluding microcracks, which can be confirmed in the observation field, relative to the entire observation field when the surface is observed.
- the open pore area ratio is a range in which, for example, an optical microscope is used to observe the surface to be measured at a magnification of 100, and the area is 0.15 mm 2 (the length in the horizontal direction is 1000 ⁇ m and the length in the vertical direction is 150 ⁇ m). Is photographed using a CCD camera attached to an optical microscope to obtain image data.
- the total area of open pores can be obtained.
- the setting conditions for the particle analysis for example, the brightness is set to dark, the binarization method is manually set, the small figure removal area is 1 ⁇ m 2 , and a threshold value that is an index indicating the brightness of the image is set in the image.
- the peak value of the histogram indicating the brightness of each point (each pixel) is 0.3 times or less.
- the unevenness of the inner surface 14A is smaller than the outer surface 12B, and the first Compared to the surface area of the outer surface 12B of the two cylinders 12, the surface area of the inner surface 14A of the first cylinder 14 is smaller. Thereby, radiation of heat energy from the outer surface 12B of the second cylinder 12 can be increased while suppressing heat energy flowing into the first cylinder 14 from the inner surface 14A, so that the first cylinder 14 And the temperature rise of the 2nd cylinder 12 can be controlled.
- the open pore area ratio of the inner surface 14A of the first cylinder 14 is 0.25% or more and 0.75%
- the open pore area ratio of the outer surface 12B of the second cylinder 12 is 0.85% or more. 5% or less.
- the difference between the open pore area ratio of the inner surface 14A and the open pore area ratio of the outer surface 12B of the second cylinder 12 is preferably 0.1% or more.
- FIG. 3 is a cross-sectional view of one embodiment of a plasma device and one embodiment of a gas laser device.
- the plasma apparatus 2 is configured to apply a voltage to a laser tube (cylinder) 10 and a conduit (internal space) 11 to which the inner surface 14A of the laser tube 10 is exposed to generate an electrode (plasma in the conduit 11).
- a cathode 5 and an anode 6) are provided.
- the gas laser apparatus 1 shown in FIG. 3 includes the plasma apparatus 2 and gas supply means (not shown) for supplying a laser oscillation gas to a pipe line (internal space) 11 of the plasma apparatus 2. In the state where the laser oscillation gas is supplied, plasma is generated by the electrodes (cathode 5 and anode 6) to generate laser light.
- the gas laser device 1 includes a laser tube 10, an envelope 7 disposed at both ends of the laser tube 10, a reflecting mirror 8 disposed inside the envelope 7, and electrodes (cathode 5). And an anode 6).
- the inside of the laser tube 10 is connected to a vacuum pump and gas supply means (not shown) so that the gas flow rate and the degree of vacuum into the laser tube 10 can be adjusted.
- argon gas plasma is applied by applying a voltage between the cathode 5 and the anode 6 in a state where the degree of vacuum is increased while flowing a rare gas such as argon and carbon dioxide gas into the laser tube 10.
- the carbon dioxide gas is excited to excite carbon dioxide light, and the light having a specific wavelength generated due to the excitation is amplified by reciprocating between the reflecting mirrors 8 to oscillate the amplified laser light.
- the corrosion of the laser tube 10 due to the plasma is prevented because the first cylinder 14 has high plasma resistance. Few.
- the laser tube 10 repeats temperature rise and fall from room temperature to several hundred degrees Celsius.
- a dense protective film plasma-resistant film
- a dense protective film is formed on the inner peripheral surface of a laser tube body made of a ceramic material such as aluminum nitride by an ion plating method or a CVD method.
- the strain due to this stress is locally accumulated in the high-quality protective film, and cracks or cracks may occur in the protective film at a relatively early stage (when the number of temperature changes is small). Since the laser tube 10 of the present embodiment has high durability against temperature changes, even if laser oscillation is repeated, that is, even if temperature changes accompanying plasma generation are repeated, the laser tube 10 is unlikely to be cracked or cracked.
- the gas laser device 1 can be used repeatedly over a relatively long period.
- FIGS. 4A to 4D are schematic cross-sectional views illustrating a method for manufacturing the laser tube 10.
- the manufacturing method of the present embodiment includes a step of preparing a rod-shaped core 30, a step of spraying an oxide containing yttrium on the outer surface of the core 30 to form the first cylindrical body 14, and a first cylinder Spraying alumina on the outer surface 14B of the body 14 to form a second cylinder 12 mainly composed of alumina joined to the outer surface 14B of the first cylinder 14, Removing the core 30 from the assembly with the second cylinder 12, and exposing the inner surface 14A of the first cylinder 14.
- the core 30 of this embodiment includes a rod-shaped shaft body 32 and a release agent layer 34 formed on the outer surface of the shaft body 32.
- the release agent layer 34 has a property of being dissolved in a specific solvent such as water or an organic solvent.
- a specific solvent such as water or an organic solvent.
- the shaft body 32 for example, a metal such as stainless steel or aluminum, a resin, or the like may be used.
- the release agent layer 34 for example, boron nitride powder or carbon powder can be used.
- the arithmetic average roughness of the outer surface of the shaft body 32 is adjusted by polishing or the like. For example, the arithmetic average roughness of the surface of the release agent 34 (that is, the outer surface of the core 30) is relatively small, about 0.2 to 0.8 ⁇ m.
- an oxide containing yttrium is sprayed on the outer surface of the core 30 to form the first cylinder 14 (FIG. 4B).
- Various thermal spraying methods such as low-pressure plasma spraying method, atmospheric pressure plasma spraying method, flame spraying method, arc spraying method, laser spraying method, etc. can be applied as the thermal spraying method. It is preferable to use an atmospheric pressure plasma spraying method because a material having the same can be applied and a corrosion-resistant film can be formed at a lower cost than other spraying methods.
- yttria (Y 2 O 3 ) (oxide containing yttria) powder is melted in a thermal spraying apparatus.
- a material having an average primary particle diameter of 0.5 to 10 ⁇ m is used.
- at least one oxide powder of Ti, Al, or Si having a particle size of about 1 ⁇ m is further added to the yttria powder at a ratio of 1% by mass or less.
- the yttria powder tends to adhere relatively strongly to the surface of the release agent 34, and the first cylinder 14 from the core 30 can be prevented from peeling off during manufacture. it can.
- a primary raw material obtained by adding at least one oxide powder of Ti, Al, and Si in a range of 0.001 to 3% by mass to yttria powder is used for general rolling granulation and the like.
- a thermal spray material having an average particle size of 10 to 50 ⁇ m is obtained using a granulation method. This thermal spray material is introduced from the powder inlet of the atmospheric pressure plasma spraying apparatus.
- the injected thermal spray material is melted by being heated to several thousand to several tens of thousands of degrees by plasma as a heat source in an atmospheric pressure plasma spraying apparatus.
- a mixed gas of argon and hydrogen is used as a gas for ejecting the molten material during thermal spraying.
- the thermal spray material melted simultaneously with the gas ejection is ejected toward the outer surface of the core 30.
- the output of the apparatus is adjusted by adding hydrogen gas mainly with argon gas. At this time, the output is preferably about 40 kW, and the distance from the core 30 to the spray port of the thermal spraying apparatus is about 100 mm.
- the thermal spray port is movable up and down and left and right while maintaining a constant distance to the base material.
- the sprayed film (first cylindrical body 14) is formed on the entire surface of the substrate while moving in the direction at intervals of 5 mm.
- the formed sprayed film (first cylinder 14) easily reflects the average primary particle size of the sprayed material used, and the average crystal particle size is 0.5 to 10 ⁇ m.
- the arithmetic average roughness of the outer surface of the core 30 is relatively small, about 0.2 to 0.8 ⁇ m, and the first cylinder is formed directly on the outer surface of the core 30. Since the fine particles 14a (see FIG. 2) are densely arranged on the inner peripheral surface 14A of the No. 14 according to the surface shape of the core 30, the arithmetic average roughness is relatively about 0.4 to 1.6 ⁇ m. Can be small. Thus, by making the surface roughness of the inner peripheral surface 14A relatively low, it is possible to suppress the detachment of the fine particles 14a from the inner peripheral surface 14A and to keep the cleanliness inside the gas laser tube 10 high.
- heat treatment can be performed to densify the formed first cylinder 14 or to further smooth the inner surface 14A of the first cylinder 14.
- the heat treatment may be performed in an atmospheric furnace if the temperature condition is satisfied.
- the heat treatment may be performed at a temperature of about 500 to 1400 ° C.
- the contact interface between the fine particles 14a of the first cylinder 14 formed by the thermal spraying method is activated to promote grain growth, the first cylinder 14 is densified, and the first cylinder 14
- It is also possible to reduce the arithmetic mean roughness by reducing the gap S between the fine particles 14a appearing on the inner peripheral surface 14A. By reducing the surface roughness of the inner peripheral surface 14A in this way, it is possible to further suppress the dropping of the fine particles 14a from the inner peripheral surface 14A and to keep the cleanliness inside the gas laser tube 10 higher.
- the thermal spraying method, thermal spraying conditions, presence / absence of temperature treatment, conditions, and the like are not particularly limited, and the thermal spraying conditions depend on the characteristics required for the first cylinder 14 such as durability against temperature changes and the effect of suppressing the dropout of the fine particles 14a.
- the first cylinder 14 having desired characteristics may be formed by adjusting the heat treatment conditions.
- alumina is sprayed on the outer surface 14B of the first cylinder 14 to form a cylindrical second cylinder 12 (FIG. 4C).
- alumina powder is first melted in a thermal spraying apparatus.
- the alumina powder for example, a material having an average primary raw material particle size of 0.4 to 10 ⁇ m is used.
- the alumina powder may contain impurities such as metal elements, but it is preferable to use a powder having a purity (alumina content) of about 90% by mass or more.
- the spraying conditions of alumina may be performed by the same method and conditions as those of the first cylinder 14 described above, and can be performed according to various conditions adjusted according to the required characteristics of the first cylinder 14.
- the yttria fine particles 14a constituting the first cylindrical body 14 are secondly formed at the boundary portion between the first cylindrical body 14 and the second cylindrical body 12.
- the alumina fine particles 12a constituting the cylindrical body 12 collide with each other, and the respective particles are bonded and grow, and the fine particles 12a of the second cylindrical body 12 enter the gap S portion between the fine particles 14a.
- the first cylindrical body 14 and the second cylindrical body 12 are coupled so as to mesh with each other, and the first cylindrical body 14 and the second cylindrical body 12 are firmly joined with a relatively high strength.
- the outer surface 12B of the second cylinder 12 formed by depositing the fine particles 12a by thermal spraying is a first cylinder 14 in which the fine particles 14a (see FIG. 2) are densely arranged according to the surface of the core 30.
- the surface roughness is large and the open pore area ratio is easily increased.
- the core 30 is removed from the assembly of the first cylinder 14 and the second cylinder 12, and the inner surface 14A of the second cylinder 14 is exposed (FIG. 4D). )).
- a mold release agent 34 is disposed on the outer surface portion of the core 30, and the mold release agent 34 is dissolved by a specific solvent to create a gap between the shaft body 32 and the first cylinder body 14. By removing 32, the core 30 can be easily removed.
- the laser tube 10 for the gas laser oscillation device can be manufactured. According to the manufacturing method of this embodiment, a plasma-resistant member having high plasma resistance and high durability against temperature change can be obtained in a short time and relatively without using a large-scale film forming apparatus such as a sputtering apparatus. It can be manufactured at low cost.
- the core 30 is composed of the shaft body 32 and the release agent 34.
- the entire core 30 is composed of a material that dissolves in a specific solvent such as acetone, for example, and the first cylindrical body 14 is formed.
- the second cylindrical body 12 may be formed, and the entire core 32 may be immersed in a specific solvent to dissolve the core 32.
- the core 30 may be made of a material having thermal decomposability, and after the first cylindrical body 14 and the second cylindrical body 12 are formed, the entire core 30 may be heated to thermally decompose and evaporate. .
- Each member structure and various conditions in this manufacturing method, such as the structure of the core 30, are not particularly limited.
- the laser tube 10 may be manufactured by a method other than the thermal spraying method.
- a ceramic green sheet mainly composed of an oxide containing yttrium such as yttria or YAG is wound around the surface of the core 30, and a ceramic green sheet mainly composed of alumina is wound thereon, and the whole is fired.
- the laser tube 10 may be manufactured.
- a pore-forming agent made of, for example, resin beads By mixing a pore-forming agent made of, for example, resin beads with these green sheets and slurry, for example, by partially adjusting the amount of the pore-forming agent, for example, the inner surface 14A of the first cylinder 14 and the first
- the arithmetic average roughness (Ra) and the surface open porosity can be changed between the outer surface 12B of the two cylinders 12.
- much labor and cost are required for manufacturing the green sheet and applying and drying the slurry.
- the laser tube 10 can be manufactured with relatively little effort and cost, and the arithmetic average roughness (Ra) and the surface open pores can be formed between the inner surface 14A and the outer surface 12B. It is also relatively easy to change the rate value.
- the gaps S between the fine particles 14a and the fine particles 12a are relatively large and large in the first cylindrical body 14 and the second cylindrical body 12, and plasma is generated. It is also preferable in that deterioration due to thermal expansion accompanying generation is suppressed.
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Abstract
Description
6 陽極
7 外囲器
8 反射鏡
10 レーザー管(筒体)
11 管路
12 第2筒体
14 第1筒体
Claims (9)
- 内表面が露出した第1筒体と、該第1筒体の外表面に接合したアルミナを主成分とする第2筒体とを有し、
前記第1筒体がイットリウムを含んだ酸化物を主成分とすることを特徴とする筒体。 - 前記第1筒体の前記内表面の算術平均粗さ(Ra)は、前記第2筒体の外表面の算術平均粗さ(Ra)よりも小さいことを特徴とする請求項1記載の筒体。
- 前記第1筒体の前記内表面の開気孔面積割合は、前記第2筒体の外表面の開気孔面積割合よりも小さいことを特徴とする請求項1または2記載の筒体。
- 前記第2筒体の厚みは、前記第1筒体の厚みよりも大きいことを特徴とする請求項1~3のいずれかに記載の筒体。
- 前記第1筒体の厚みは、0.5mm以上1mm以下であり、
前記第2筒体の厚みは、2.6mm以上3.6mm以下 であることを特徴とする請求項4に記載の筒体。 - 前記第1筒体は、溶射法によって形成されており、
前記第2筒体は、溶射法によって形成されていることを特徴とする請求項1~5のいずれかに記載の筒体。 - 請求項1~6のいずれかに記載の筒体と、
前記筒体の内部空間にプラズマを生成するための電極とを備えることを特徴とするプラズマ装置。 - 請求項7に記載のプラズマ装置と、
前記プラズマ装置の前記内部空間にレーザー発振用ガスを供給するガス供給手段とを備え、
前記内部空間に前記レーザー発振用ガスが供給された状態で、前記電極によってプラズマを生成してレーザー光を発生させることを特徴とするガスレーザー装置。 - 棒状の中子を準備する工程と、
前記中子の外表面にイットリウムを含む酸化物を溶射して、イットリウムを含む酸化物を主成分とする第1筒体を形成する工程と、
前記第1筒体の外表面にアルミナを溶射して、該第1筒体の外表面に接合したアルミナを主成分とする第2筒体とを形成する工程と、
前記第1筒体と前記第2筒体との集合体から前記中子を除去し、前記第1筒体の内表面を露出させる工程とを備えたことを特徴とする筒体の製造方法。
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JP2015560056A JP6272361B2 (ja) | 2014-01-30 | 2015-01-30 | プラズマ用筒体、プラズマ装置、ガスレーザー装置、およびプラズマ用筒体の製造方法 |
US15/115,649 US10090628B2 (en) | 2014-01-30 | 2015-01-30 | Cylinder, plasma apparatus, gas laser apparatus, and method of manufacturing cylinder |
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US20210057864A1 (en) * | 2019-08-19 | 2021-02-25 | Iradion Laser, Inc. | Enhanced waveguide surface in gas lasers |
JPWO2021060180A1 (ja) * | 2019-09-27 | 2021-04-01 |
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JPWO2021060180A1 (ja) * | 2019-09-27 | 2021-04-01 | ||
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US10090628B2 (en) | 2018-10-02 |
JPWO2015115624A1 (ja) | 2017-03-23 |
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US20170179669A1 (en) | 2017-06-22 |
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