JP5698740B2 - ジルコニア−アルミナ・セラミック材料 - Google Patents
ジルコニア−アルミナ・セラミック材料 Download PDFInfo
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- JP5698740B2 JP5698740B2 JP2012518022A JP2012518022A JP5698740B2 JP 5698740 B2 JP5698740 B2 JP 5698740B2 JP 2012518022 A JP2012518022 A JP 2012518022A JP 2012518022 A JP2012518022 A JP 2012518022A JP 5698740 B2 JP5698740 B2 JP 5698740B2
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- Prior art keywords
- zirconia
- alumina
- cerium
- yttrium
- aluminate
- Prior art date
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- 229910010293 ceramic material Inorganic materials 0.000 title claims description 28
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 247
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 50
- 229910052684 Cerium Inorganic materials 0.000 claims description 44
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 44
- 229910052751 metal Inorganic materials 0.000 claims description 44
- 239000002184 metal Substances 0.000 claims description 44
- 229910052727 yttrium Inorganic materials 0.000 claims description 43
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 43
- 150000004645 aluminates Chemical class 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 28
- 238000005245 sintering Methods 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 9
- 229910052712 strontium Inorganic materials 0.000 claims description 6
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- 239000005084 Strontium aluminate Substances 0.000 claims description 4
- -1 lanthanoid aluminate Chemical class 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- FNWBQFMGIFLWII-UHFFFAOYSA-N strontium aluminate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Sr+2].[Sr+2] FNWBQFMGIFLWII-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 2
- 229910052747 lanthanoid Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 description 72
- 239000012071 phase Substances 0.000 description 40
- 238000005096 rolling process Methods 0.000 description 25
- 239000011159 matrix material Substances 0.000 description 21
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 14
- 239000000126 substance Substances 0.000 description 11
- 239000000919 ceramic Substances 0.000 description 10
- 230000000087 stabilizing effect Effects 0.000 description 9
- 239000010936 titanium Substances 0.000 description 9
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000001513 hot isostatic pressing Methods 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000010987 cubic zirconia Substances 0.000 description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000009661 fatigue test Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 206010027476 Metastases Diseases 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000007545 Vickers hardness test Methods 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 239000000316 bone substitute Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009401 metastasis Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- UFQXGXDIJMBKTC-UHFFFAOYSA-N oxostrontium Chemical compound [Sr]=O UFQXGXDIJMBKTC-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
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- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
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Description
ジルコニア(ZrO2)は3つの結晶学的形態を有する。その天然の結晶形態は単斜晶ジルコニアであり、それは1気圧において約1170℃の温度まで安定である。約1170℃ないし約2370℃での安定相は正方晶ジルコニアである。約2370℃よりも高温では、安定相は立方晶ジルコニアである。ジルコニアの異なる相は、例えばx−線回折のように当該技術分野でよく知られている技術によって同定し得る。例えば、米国特許第4316964号には、どのように27〜33°の2θスキャンを用いて単斜晶ジルコニア相に対する正方晶ジルコニア相の比を測定し、55〜62°のスキャンを用いて正方晶または立方晶のジルコニア構造を測定し得るかが記載されている。
セリウム含有ジルコニアおよびイットリウム安定化ジルコニアを含むマトリクス、ここにセリウム含有ジルコニアは8ないし16モル%のセリウム含量を有し、かつ、材料の35ないし45重量%の量で存在し、および、ここにイットリウム含有ジルコニアは3.0ないし9.0モル%(すなわち、Y2O3酸化物ベースで1.5ないし4.5モル%)のイットリウム含量を有し、材料の25ないし35重量%の量で存在する、
20ないし30重量%のアルミナ、および
3ないし8重量%の金属アルミン酸塩小板
を含むセラミック材料を含む。
セリウム含有ジルコニアおよびイットリウム安定化ジルコニアを含むマトリクス、ここにセリウム含有ジルコニアは約12モル%セリウムのセリウム含量を有し、かつ、材料の約39重量%の量で存在し、および、ここにイットリウム含有ジルコニアは約6モル%(すなわち、Y2O3酸化物ベースで3モル%)のイットリウム含量を有し、かつ、材料の約29.5重量%の量で存在し、
約24.6重量%のアルミナ、および
約5.7重量%の金属アルミン酸塩小板
を含むセラミック材料である。
詳細には、ジルコニアマトリクスは多数の経路によって形成し得る。例えば、非ドープジルコニアは、別にして提供し得、セリウム源およびイットリウム源と混合し、焼結温度まで加熱し得る。典型的なセリウムおよびイットリウム源はそれらの酸化物(CeO2およびY2O3)である。
未焼結材料を含むスリップをノズルを通して噴霧して液滴を形成し、
これらの液滴を凍結乾燥または噴霧乾燥して小粒を形成し、
小粒を圧縮してグリーンボディーを形成し、ついで
グリーンボディーを焼結する
ことを含む。
本発明のローラーベアリングは、好ましくは滑らかにされている。好ましくは、滑剤は水が含まれるかまたは水のみからなる。特に、本発明者らは、本発明の組成物が水−潤滑化されたベアリングのように潤滑化されたベアリングに有利である水熱安定性および化学的安定性を示すことを見出した。
0.01-2のC
0.6-10のN
0.01-3.0のSi
0.01-10.0のMn
16-30のCr
0.01-5.0のMo
0.01-15.0のV
0-5のNi
0-5のCo
0-5のW
0-5のTi
0-5のZr
0-5のAl
0-0.5のS
およびいずれか不可避の不純物と一緒にバランスの鉄
を含む鋼組成物製である「ハイブリッド」ベアリングを提供する。
鋼材料は、好ましくは0.6-7のN、より好ましくは0.8-6のN、いまだより好ましくは1-5のNを含む。
鋼材料は、好ましくは0.05-2のSi、より好ましくは0.1-1のSi、いまだより好ましくは0.2-0.6のSiを含む。
鋼材料は、好ましくは0.05-2のMn、より好ましくは0.1-1のMn、いまだより好ましくは0.2-0.6のMnを含む。
鋼材料は、好ましくは17-25のCr、より好ましくは18-24のCr、いまだより好ましくは19-23のCrを含む。
鋼材料は、好ましくは0.05-4のMo、より好ましくは0.1-3のMo、いまだより好ましくは0.5-2のMoを含む。
鋼材料は、好ましくは0.5-14のV、より好ましくは1-12のV、いまだより好ましくは2-10のVを含む。
0.05-0.5のC(好ましくは0.1-0.3のC)
0.6-3のN(好ましくは1-2のN)
0.05-1のSi(好ましくは0.1-0.5のSi)
0.05-1のMn(好ましくは0.1-0.5のMn)
16-24のCr(好ましくは18-22のCr)
0.05-3のMo(好ましくは1-1.6のMo)
0.05-5のV(好ましくは1.5-4のV)
0-5のNi(好ましくは0-1のNi)
0-5のCo(好ましくは0-1のCo)
0-5のW(好ましくは0-1のW)
0-5のTi(好ましくは0-1のTi)
0-5のZr(好ましくは0-1のZr)
0-5のAl(好ましくは0-1のAl)
0-0.5のS(好ましくは0-0.2のS)
およびいずれか不可避の不純物と一緒にバランスの鉄
を含む。
0.05-0.5のC(好ましくは0.1-0.3のC)
2-6のN(好ましくは3-5のN)
0.05-1のSi(好ましくは0.1-0.5のSi)
0.05-1のMn(好ましくは0.1-0.5のMn)
17-25のCr(好ましくは19-23のCr)
0.05-3のMo(好ましくは1-1.6のMo)
6-12のV(好ましくは7-11のV)
0-5のNi(好ましくは0-1のNi)
0-5のCo(好ましくは0-1のCo)
0-5のW(好ましくは0-1のW)
0-5のTi(好ましくは0-1のTi)
0-5のZr(好ましくは0-1のZr)
0-5のAl(好ましくは0-1のAl)
0-0.5のS(好ましくは0-0.2のS)
およびいずれか不可避の不純物と一緒にバランスの鉄
を含む。
実施例および裏付けとして提供する多数の実験結果に参照して、本発明を説明する。
表1に詳記する組成物は、鋳込成型、焼結条件下の加熱(空気中、1520℃)、ついで熱間静水圧加圧(HIP)に付すことによって形成した。それらの特性を多くの基準に対して試験し、特に、材料が以下の特性を示すか否かを試験した:
1. 強度(MPa):窒化ケイ素セラミックボール用のASTM F2094−06標準規格による4点曲げ試験、常温(約20℃)におけるアドバンストセラミックスの曲げ強度のC1161試験方法によって測定;
2. 圧痕靭性(MPam1/2):窒化ケイ素セラミックボール用のASTM F2094−06標準規格、常温におけるアドバンストセラミックスの破壊靱性決定用の1421試験方法によって測定;
3. HV10硬度(kg/mm2):窒化ケイ素セラミックボール用のASTM F 204−06標準規格、アドバンストセラミックスのビッカース押込み硬度用のC1327試験方法によって測定;
4. 弾性係数(MPa):共振ビーム法による測定、欧州規格EN15335:2007 高度な技術セラミック−セラミック複合体−2000℃までの共振ビーム法による弾性特性;
5. 水と蒸気の抵抗、特に300°C、86bar、オートクレーブ中で9日間試験した;
6. 強酸および塩基に対する化学的耐性、37重量%のHCl、50重量%のH2SO4および50重量%のH3PO4、および10MのNaOH、各々70℃にて30日間、別々に試験した;
7. 油中の低圧転がり接触疲労抵抗:2.0GPa下で油中のPolymet転がり接触疲労試験により試験した;
8. 油中の高圧転がり接触疲労抵抗:4.5GPa接触圧力下で油中のPolymet転がり接触疲労試験により試験した;
9. 水中の転がり接触疲労抵抗:4.5GPa接触圧力下で脱イオン水を使用して、Polymet転がり接触疲労試験により試験した。
表2に詳述する組成物は、鋳込み成形し、焼結条件(空気中、1520℃)下で加熱し、ついでHIPに付すことによって形成した。それらの特性を試験し、表2に示す。
表3に詳述する組成物は、鋳込み成形し、焼結条件(空気中、1520°C)下で加熱し、ついでHIPに付すことによって形成した。ついで、それらの特性を試験し、以下の表3に示す。
"E1"として表4に詳述する化学組成物は、ノズルを通して噴霧して液滴を形成した。ついで、液滴は凍結乾燥して小粒を形成した。ついで、小粒を圧縮してグリーンボディーを形成し、それを空気中、1520℃にて焼結し、ついでHIPに付した。ついでその特性を試験し、以下の表4に示す。
Claims (14)
- ローラーベアリング用のベアリングコンポーネントであって、その少なくとも一部分がセラミック材料から形成されており、該セラミック材料が
ジルコニア、イットリウムおよびセリウムを含む第1の相、ここに、イットリウムおよびセリウムは0.15ないし0.5のモル比および5ないし15モル%の結合した量で存在し、
アルミナを含む第2の相、および
金属アルミン酸塩小板を含む第3の相
を含み、ここに該第1の相および第2の相が3:1ないし1:1の重量比で存在し、該第2の相および第3の相が2:1ないし20:1の重量比で存在する、該ベアリングコンポーネント。 - ベアリングコンポーネントが、ローラー要素である請求項1記載のベアリングコンポーネント。
- 金属アルミン酸塩小板が、アルカリ土類アルミン酸塩および/またはランタノイドアルミン酸塩を含む請求項1または2記載のベアリングコンポーネント。
- 金属アルミン酸塩小板がアルミン酸ストロンチウムおよび/またはアルミン酸ランタンを含む請求項1ないし3のいずれか1項に記載のベアリングコンポーネント。
- 金属アルミン酸塩小板がストロンチウム六アルミン酸塩(SrO・6Al2O3)を含む請求項4記載のベアリングコンポーネント。
- 第1の相がイットリウム含有ジルコニアおよびセリウム含有ジルコニアのコンポジットである請求項1ないし5のいずれか1項に記載のベアリングコンポーネント。
- ローラーコンポーネントのローラー表面がセラミック材料から形成されている請求項1ないし6のいずれか1項に記載のベアリングコンポーネント。
- 請求項1ないし7のいずれか1項に記載のベアリングコンポーネントに使用するためのセラミック材料を製造する方法であって、
ジルコニアおよびアルミナを含むスリップをノズルを通して噴霧して液滴を形成し、
液滴を凍結乾燥または噴霧乾燥して小粒を形成し、
小粒を圧縮してグリーンボディーを形成し、ついで
グリーンボディーを焼結することを含み、
ここに、ジルコニアが0.15ないし0.5のモル比でかつ5ないし15モル%の結合した量でイットリウムおよびセリウムを含み、スリップが、さらに、アルミン酸塩小板および/またはグリーンボディーを焼結する間にアルミン酸小板を形成するアルミナ小板前駆体を含む、該方法。 - ジルコニアおよびアルミナを含むセラミック材料を製造する方法であって、
ジルコニア、アルミナおよび金属アルミン酸塩小板および/または金属アルミン酸塩小板前駆体を含むスリップをノズルを通して噴霧して液滴を形成し、
液滴を凍結乾燥または噴霧乾燥して小粒を形成し、
小粒を圧縮してグリーンボディーを形成し、ついで
グリーンボディーを焼結することを含み、ここに、金属アルミン酸塩小板がグリーンボディーの焼結の間に金属アルミン酸塩小板前駆体から形成される、ジルコニアおよびアルミナを含むセラミック材料の製造方法。 - スリップが、イットリウム含有ジルコニアおよびセリウム含有ジルコニアを含み、ここに、イットリウム含有ジルコニアおよびセリウム含有ジルコニアが0.15ないし0.5のイットリウムおよびセリウムの量のモル比に対する相対量で提供される請求項8または9記載の方法。
- 請求項1ないし7のいずれか1項に記載のローラーコンポーネントを含むローラーベアリング。
- 内側リング、外側リングおよび内側リングと外側リングとの間の請求項1ないし7のいずれか1項に記載の少なくとも1のローラー要素を含み、ここに、内側リングおよび/または外側リングが:
0.01-2重量%のC、
0.6-10重量%のN、
0.01-3.0重量%のSi、
0.01-10.0重量%のMn、
16-30重量%のCr、
0.01-5.0重量%のMo、
0.01-15.0重量%のV、
0-5重量%のNi、
0-5重量%のCo、
0-5重量%のW、
0-5重量%のTi、
0-5重量%のZr、
0-5重量%のAl、
0-0.5重量%のS
およびいずれか不可避の不純物と一緒に含むバランスの鉄を含む鋼組成物製である、ローラーベアリング。 - ローラーベアリングが、滑らかにされている請求項12記載のローラーベアリング。
- ローラーベアリングが、水によって滑らかにされている請求項13記載のローラーベアリング。
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