JP6696802B2 - 耐環境コーティング部材 - Google Patents
耐環境コーティング部材 Download PDFInfo
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- JP6696802B2 JP6696802B2 JP2016048810A JP2016048810A JP6696802B2 JP 6696802 B2 JP6696802 B2 JP 6696802B2 JP 2016048810 A JP2016048810 A JP 2016048810A JP 2016048810 A JP2016048810 A JP 2016048810A JP 6696802 B2 JP6696802 B2 JP 6696802B2
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- 239000011248 coating agent Substances 0.000 title claims description 43
- 238000000576 coating method Methods 0.000 title claims description 43
- 239000000463 material Substances 0.000 title description 9
- 239000010410 layer Substances 0.000 claims description 284
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 110
- 238000006243 chemical reaction Methods 0.000 claims description 55
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 54
- 229910052863 mullite Inorganic materials 0.000 claims description 54
- 150000002910 rare earth metals Chemical class 0.000 claims description 39
- 239000000758 substrate Substances 0.000 claims description 36
- 229910003564 SiAlON Inorganic materials 0.000 claims description 32
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 28
- 239000011226 reinforced ceramic Substances 0.000 claims description 26
- 239000011247 coating layer Substances 0.000 claims description 23
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 230000001629 suppression Effects 0.000 claims description 10
- 229910052765 Lutetium Inorganic materials 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 6
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical group [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 4
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 38
- 229910010271 silicon carbide Inorganic materials 0.000 description 37
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 28
- 239000000835 fiber Substances 0.000 description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000000034 method Methods 0.000 description 15
- 239000002994 raw material Substances 0.000 description 15
- 239000007791 liquid phase Substances 0.000 description 13
- -1 rare earth silicates Chemical class 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 11
- 229910004298 SiO 2 Inorganic materials 0.000 description 10
- 238000010894 electron beam technology Methods 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 239000000377 silicon dioxide Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000007740 vapor deposition Methods 0.000 description 7
- 229910018557 Si O Inorganic materials 0.000 description 6
- 238000005566 electron beam evaporation Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910052693 Europium Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052775 Thulium Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000007088 Archimedes method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011153 ceramic matrix composite Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000005546 reactive sputtering Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
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- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
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- C04B35/597—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon oxynitride, e.g. SIALONS
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
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- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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Description
1.SiC長繊維強化セラミックス基材と、前記SiC長繊維強化セラミックス基材の一面に設けられた耐環境コーティング層とを備える耐環境コーティング部材であって、
前記耐環境コーティング層は、前記SiC長繊維強化セラミックス基材に積層されたSiAlON結合層と、前記SiAlON結合層に積層されたムライト層と、前記ムライト層に積層された反応抑制層と、前記反応抑制層に積層された希土類ダイシリケートから希土類モノシリケートへと組成が遷移する傾斜層とを有し、
前記反応抑制層は、Al2O3層、RE3Al5O12層(REは希土類元素である)及び[(1−x)RE2SiO5−xRE2Si2O7]層(REは希土類元素であり、0≦x≦1である)のうちの少なくとも1層であることを特徴とする耐環境コーティング部材。
2.前記SiC長繊維強化セラミックス基材のマトリックスが、SiC、Si3N4及びSiAlONのうちの少なくとも1種である前記1.に記載の耐環境コーティング部材。
3.前記SiAlON結合層は、SiAlONをSi6−ZAlZOZN8−Zと表したときに、1200〜1600℃の温度範囲において、0<z≦3.5である前記1.又は2.に記載の耐環境コーティング部材。
4.前記反応抑制層は、前記Al2O3層、前記RE3Al5O12層及び前記[(1−x)RE2SiO5−xRE2Si2O7]層のうちの少なくとも2層からなり、前記ムライト層側から前記傾斜層側へと、前記Al2O3層、前記RE3Al5O12層及び前記[(1−x)RE2SiO5−xRE2Si2O7]層の順に積層されてなる前記1.乃至3.のうちのいずれか1項に記載の耐環境コーティング部材。
5.前記傾斜層は、前記反応抑制層側が希土類ダイシリケート緻密層、表面側が希土類モノシリケート柱状層である前記1.乃至4.のうちのいずれか1項に記載の耐環境コーティング部材。
6.前記希土類元素はイッテルビウム又はルテチウムである前記1.乃至5.のうちのいずれか1項に記載の耐環境コーティング部材。
また、SiC長繊維強化セラミックス基材のマトリックスが、SiC、Si3N4及びSiAlONのうちの少なくとも1種である場合は、軽量で耐熱性に優れ、且つ高温域での比強度が大きい基材とすることができ、航空機エンジンのタービン等の高温部品として有用な耐環境コーティング部材とすることができる。
更に.SiAlON結合層が、SiAlONをSi6−ZAlZOZN8−Zと表したときに、1200〜1600℃の温度範囲において、0<z≦3.5である場合は、1400℃を超える高温であっても、SiC長繊維強化セラミックス基材とムライト層とを強固に密着させることができる。
また、反応抑制層が、Al2O3層、RE3Al5O12層及び[(1−x)RE2SiO5−xRE2Si2O7]層のうちの少なくとも2層からなり、ムライト層側から傾斜層側へと、Al2O3層、RE3Al5O12層及び[(1−x)RE2SiO5−xRE2Si2O7]層の順に積層されてなる場合は、希土類ダイシリケート層とムライト層との間の液相生成がより抑制され、希土類ダイシリケート層とムライト層とを十分に密着させることができる。
更に、傾斜層が、反応抑制層側が希土類ダイシリケート緻密層、表面側が希土類モノシリケート柱状層である場合は、柱状層が熱衝撃緩和層となり、耐熱サイクル性を向上させることができる。
また、希土類元素がイッテルビウム又はルテチウムである場合は、より優れた水蒸気遮蔽及び熱衝撃緩和の作用が奏される耐環境コーティング部材とすることができる。
本発明の耐環境コーティング部材100は、SiC長繊維強化セラミックス基材1と、SiC長繊維強化セラミックス基材1の一面に設けられた耐環境コーティング層2とを備える。また、耐環境コーティング層2は、SiC長繊維強化セラミックス基材1に積層されたSiAlON結合層21と、SiAlON結合層21に積層されたムライト層22と、ムライト層22に積層された反応抑制層23と、反応抑制層23に積層された希土類ダイシリケートから希土類モノシリケートへと組成が遷移する傾斜層24とを有する(図1参照)。
尚、相対密度は、純水を溶媒としてアルキメデス法により測定した嵩密度を、理論密度により除して算出することができる。
ムライト層を模擬したムライト基材を1020℃に加熱し、その一面に電子ビーム蒸着法により耐環境コーティング層を形成した。耐環境コーティング層は、加熱されたムライト基材の一面に、反応抑制層である[(1−x)Yb2SiO5−xYb2Si2O7]層及びYb2Si2O7層をこの順に積層させ形成した。
実施例1と同様にして作製し、ムライト基材を1020℃に加熱し、その一面に電子ビーム蒸着法により耐環境コーティング層を形成した。耐環境コーティング層は、加熱されたムライト基材の一面に、Yb2Si2O7を形成した。更に、この比較例1では、反応抑制層である[(1−x)Yb2SiO5−xYb2Si2O7]層は形成しなかった。
実施例1比較例1で製造した耐環境コーティング部材のムライト基材、反応抑制層及びYb2Si2O7緻密層の一部の断面、及び比較例1で製造した耐環境コーティング部材のムライト基材及びYb2Si2O7緻密層の一部の断面を、走査型電子顕微鏡により観察し、浸食の程度を評価した。より具体的には、実施例1及び比較例1で製造した耐環境コーティング部材から試験片を切り出し、その切断面を#800研削仕上げした後、イオンミリングにより平滑化し、走査型電子顕微鏡(日立製作所製、型式「SU−8000」)にて観察した。倍率は実施例1が3000倍、比較例1が4000倍である。
Claims (6)
- SiC長繊維強化セラミックス基材と、前記SiC長繊維強化セラミックス基材の一面に設けられた耐環境コーティング層とを備える耐環境コーティング部材であって、
前記耐環境コーティング層は、前記SiC長繊維強化セラミックス基材に積層されたSiAlON結合層と、前記SiAlON結合層に積層されたムライト層と、前記ムライト層に積層された反応抑制層と、前記反応抑制層に積層された希土類ダイシリケートから希土類モノシリケートへと組成が遷移する傾斜層とを有し、
前記反応抑制層は、Al2O3層、RE3Al5O12層(REは希土類元素である)及び[(1−x)RE2SiO5−xRE2Si2O7]層(REは希土類元素であり、0≦x<1である)のうちの少なくとも1層であることを特徴とする耐環境コーティング部材。 - 前記SiC長繊維強化セラミックス基材のマトリックスが、SiC、Si3N4及びSiAlONのうちの少なくとも1種である請求項1に記載の耐環境コーティング部材。
- 前記SiAlON結合層は、SiAlONをSi6−ZAlZOZN8−Zと表したときに、1200〜1600℃の温度範囲において、0<z≦3.5である請求項1又は2に記載の耐環境コーティング部材。
- 前記反応抑制層は、前記Al2O3層、前記RE3Al5O12層及び前記[(1−x)RE2SiO5−xRE2Si2O7]層のうちの少なくとも2層からなり、前記ムライト層側から前記傾斜層側へと、前記Al2O3層、前記RE3Al5O12層及び前記[(1−x)RE2SiO5−xRE2Si2O7]層の順に積層されてなる請求項1乃至3のうちのいずれか1項に記載の耐環境コーティング部材。
- 前記傾斜層は、前記反応抑制層側が希土類ダイシリケート緻密層、表面側が希土類モノシリケート柱状層である請求項1乃至4のうちのいずれか1項に記載の耐環境コーティング部材。
- 前記希土類元素はイッテルビウム又はルテチウムである請求項1乃至5のうちのいずれか1項に記載の耐環境コーティング部材。
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