CN111548163A - Method for preparing silicon nitride ceramic balls for large-size wind power generation - Google Patents
Method for preparing silicon nitride ceramic balls for large-size wind power generation Download PDFInfo
- Publication number
- CN111548163A CN111548163A CN202010420109.6A CN202010420109A CN111548163A CN 111548163 A CN111548163 A CN 111548163A CN 202010420109 A CN202010420109 A CN 202010420109A CN 111548163 A CN111548163 A CN 111548163A
- Authority
- CN
- China
- Prior art keywords
- silicon nitride
- sintering
- ceramic balls
- power generation
- wind power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 60
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000000919 ceramic Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010248 power generation Methods 0.000 title claims abstract description 20
- 238000005245 sintering Methods 0.000 claims abstract description 66
- 238000001513 hot isostatic pressing Methods 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims description 29
- 235000015895 biscuits Nutrition 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 3
- 239000011812 mixed powder Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 9
- 238000009694 cold isostatic pressing Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 239000006104 solid solution Substances 0.000 abstract description 3
- 239000012298 atmosphere Substances 0.000 description 9
- 230000004927 fusion Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 239000012752 auxiliary agent Substances 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000012798 spherical particle Substances 0.000 description 4
- 238000009966 trimming Methods 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- C04B35/565—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 based on silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
- C04B35/645—Pressure sintering
- C04B35/6455—Hot isostatic pressing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3839—Refractory metal carbides
- C04B2235/3843—Titanium carbides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a method for preparing silicon nitride ceramic balls for large-size wind power generation, which selects a high-toughness silicon nitride material system through technologies such as nano modification, multi-term solid solution, particle grading and the like; preparing large-size silicon nitride ceramic balls by adopting a cold isostatic pressing near-net-size forming technology; an optimal process route is determined by combining a gas pressure sintering process and a hot isostatic pressing sintering post-treatment process, so that the defects of the existing large-size bearing ball are overcome. The method selects a high-toughness silicon nitride material system through technologies such as nano modification, multi-term solid solution, particle grading and the like; preparing large-size silicon nitride ceramic balls by adopting a cold isostatic pressing near-net-size forming technology; an optimal process route is determined by combining a gas pressure sintering and hot isostatic pressing sintering post-treatment process, so that the defects of large size, difficult sintering, uneven density gradient, low yield, poor batch stability and the like of the conventional large-size bearing ball are overcome.
Description
Technical Field
The invention relates to the technical field of ceramic preparation, and particularly provides a method for preparing a silicon nitride ceramic ball for large-size wind power generation.
Background
In recent years, world advanced wind power bearings including yaw bearings, pitch bearings and especially main shaft bearings are mainly hybrid bearings, and rolling bodies used in the hybrid bearings are silicon nitride ceramic balls (
The material has the characteristics of high strength, high hardness, high temperature resistance, corrosion resistance, oxidation resistance, thermal shock resistance, creep resistance and good wear resistance, can still maintain the excellent performance at high temperature, and is widely applied to high-temperature gas turbines, aerospace, nuclear industry, high-efficiency engine parts and other high-technology fields.
The working temperature range of the silicon nitride ceramic ball mixed ceramic bearing can reach 800 ℃, the silicon nitride ceramic ball mixed ceramic bearing has excellent self-lubricating property, corrosion resistance and wear resistance, and the working strength and the service life of the silicon nitride ceramic ball mixed ceramic bearing are 4-5 times of those of a common all-steel bearing.
However, the production of large-size silicon nitride balls mainly has the main problems of large size, difficult sintering, uneven density gradient, low yield, poor batch stability and the like, so that the current industrialized silicon nitride bearing balls are basically in the size
The following.
Disclosure of Invention
The technical task of the invention is to provide a method for preparing silicon nitride ceramic balls for large-size wind power generation, aiming at solving the problems of non-uniform density and poor batch stability of large-size ceramic bearing balls.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for preparing silicon nitride ceramic balls for large-size wind power generation is provided, the method modifies silicon nitride powder by adding nano TiC, effectively improves powder sintering activity, and enhances mechanical properties of materials, and the method comprises the following steps:
the nano TiC and the sintering aid are premixed to be uniformly mixed, and then are dispersed and mixed with the silicon nitride powder through the high-efficiency circulating stirring mill, so that self-agglomeration of nano particles and superfine silicon nitride particles is reduced, and uniform mixing of the silicon nitride particles and the sintering aid is realized.
The nano TiC and the sintering aid are fully mixed in advance, so that agglomeration of fine nano particles and fine silicon nitride particles can be avoided when the nano TiC and the sintering aid are mixed with the silicon nitride later.
The silicon nitride ceramic ball is prepared by the following raw materials in parts by weight: the content of silicon nitride is 90-95%, the content of nano titanium carbide is 1-2%, and the content of sintering aid is 4-8%.
The sintering aid is one or more of yttrium oxide, magnesium oxide, aluminum oxide and tungsten carbide.
The method specifically comprises the following steps:
(1) premixing the nano TiC and the sintering aid to uniformly mix the nano TiC and the sintering aid;
(2) and then uniformly mixing the silicon nitride powder with the high-efficiency circulating stirring mill, reducing self-agglomeration of nano particles and superfine silicon nitride particles, and realizing uniform mixing of the silicon nitride particles and the sintering aid.
(3) Granulating the mixed powder in a centrifugal spray granulator to form powder for later use;
(4) pressing and molding the powder to be used formed in the step (3) to form a ball blank;
(5) shaping the pressed ball blank to prepare a bearing ball biscuit meeting the requirements;
(6) putting the bearing ball biscuit obtained in the step (5) into an atmosphere pressure sintering furnace for air pressure sintering to prepare an air pressure sintering blank ball;
(7) and (4) putting the air pressure sintering blank ball obtained in the step (6) into a hot isostatic pressing sintering furnace for hot isostatic pressing treatment after sintering.
The phase content of the silicon nitride powder is more than 92 percent.
In the step (6), the sintering temperature is 1740-1900 ℃, the temperature is kept for 4 hours, the total sintering time is 15-20 hours, and the maximum pressure of the nitrogen atmosphere is 8-20 Mpa.
The sintering temperature is preferably 1780-1850 ℃.
In the step (7), the hot isostatic pressing treatment temperature is 1600-1700 ℃, the heat preservation time is 2-4 hours, and the pressure is 160-200 Mpa.
The premixing time of the nano TiC and the sintering aid in the step (1) is 4-6h, and the mixing time of uniformly mixing the nano TiC and the sintering aid with the silicon nitride powder in the step (2) is 4-6 h.
And (4) putting the powder to be used in the step (4) into a special ball-making grinding tool, and putting the special ball-making grinding tool into a cold isostatic press for pressing and molding, wherein the pressure is set to be between 180 and 260 MPa.
Compared with the prior art, the method for preparing the silicon nitride ceramic ball for large-size wind power generation has the following outstanding beneficial effects:
the method selects a high-toughness silicon nitride material system through technologies such as nano modification, multi-term solid solution, particle grading and the like; preparing large-size silicon nitride ceramic balls by adopting a cold isostatic pressing near-net-size forming technology; an optimal process route is determined by combining a post-treatment process of air pressure sintering and hot isostatic pressing sintering, so that the defects of large size, difficult sintering, uneven density gradient, low yield, poor batch stability and the like of the conventional large-size bearing ball are overcome, and the sampling density change of different parts of the obtained ceramic ball density gradient is less than 0.4%; the hardness gradient is less than 1 percent; the bending strength is more than 800 MPa.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
A method for preparing silicon nitride ceramic balls for large-size wind power generation comprises the following implementation steps:
(1) placing TiC with the content of 2%, yttrium oxide with the content of 2% and magnesium oxide with the content of 2% into a ball mill for ball milling for 4 hours;
(2) putting 95% of silicon nitride powder and the auxiliary agent obtained in the step (1) into a circulating stirring mill for full fusion for 4 hours;
(3) atomizing the slurry obtained in the step (2) through closed spray granulation to obtain spherical particles with the particle size of 100-200 microns;
(4) putting the powder obtained in the step (3) into a customized ball making grinding tool, and putting the powder into cold isostatic pressing for ball making pressing, wherein the pressure is 160Mpa, and the pressure maintaining time is 100S;
(5) trimming the biscuit balls pressed in the step (4) to remove redundant excess materials;
(6) putting the biscuit balls obtained in the step (5) into an atmosphere pressure sintering furnace for sintering, wherein the sintering temperature is 1780 ℃ and the pressure is 16 MPa;
(7) putting the silicon nitride blank balls obtained in the step (6) into a hot isostatic pressing sintering furnace for post-sintering treatment, wherein the sintering temperature is 1680 ℃, the heat is preserved for 3 hours, and the atmosphere pressure is 1890 MPa;
samples were taken at radius 1/2 from the center of the sphere and tested for densities of 3.23, 2.23, and 3.24, respectively. The density gradient is 0.3 percent, the Vickers hardness is 1462, 1465 and 1468, and the hardness gradient is 0.4 percent; bending strength 910 MPa.
Example 2
A method for preparing silicon nitride ceramic balls for large-size wind power generation comprises the following implementation steps:
(1) placing 1.5% of TiC, 3% of yttrium oxide and 3% of magnesium oxide into a ball mill for ball milling for 6 hours;
(2) putting 92.5% of silicon nitride powder and the auxiliary agent obtained in the step (1) into a circulating stirring mill for full fusion, wherein the fusion time is 6 hours;
(3) atomizing the slurry obtained in the step (2) through closed spray granulation to obtain spherical particles with the particle size of 100-200 microns;
(4) putting the powder obtained in the step (3) into a customized ball making grinding tool, and putting the powder into cold isostatic pressing for ball forming pressing, wherein the pressure is 180Mpa, and the pressure maintaining time is 120S;
(5) trimming the biscuit balls pressed in the step (4) to remove redundant excess materials;
(6) placing the biscuit balls obtained in the step (5) into an atmosphere pressure sintering furnace for sintering, wherein the sintering temperature is 1760 ℃ and the pressure is 14 MPa;
(7) putting the silicon nitride blank ball obtained in the step (6) into a hot isostatic pressing sintering furnace for post-sintering treatment, wherein the sintering temperature is 1650 ℃, the temperature is kept for 3 hours, and the atmosphere pressure is 190 Mpa;
samples were taken at radius 1/2 from the center of the sphere and tested for densities of 3.24, 2.24, and 3.25, respectively. The hardness is 1465, 1470 and 1470, and the bending strength is 880 Mpa.
Example 3
A method for preparing silicon nitride ceramic balls for large-size wind power generation comprises the following implementation steps:
(1) placing 1% of TiC, 3% of yttrium oxide and 6% of alumina into a ball mill for ball milling for 6 hours;
(2) putting 90% of silicon nitride powder and the auxiliary agent obtained in the step (1) into a circulating stirring mill for full fusion for 6 hours;
(3) atomizing the slurry obtained in the step (2) through closed spray granulation to obtain spherical particles with the particle size of 100-200 microns;
(4) putting the powder obtained in the step (3) into a customized ball making grinding tool, and putting the powder into cold isostatic pressing for ball forming pressing, wherein the pressure is 180Mpa, and the pressure maintaining time is 120S;
(5) trimming the biscuit balls pressed in the step (4) to remove redundant excess materials;
(6) putting the biscuit balls obtained in the step (5) into an atmosphere pressure sintering furnace for sintering, wherein the sintering temperature is 1750 ℃ and the pressure is 10 MPa;
(7) putting the silicon nitride blank ball obtained in the step (6) into a hot isostatic pressing sintering furnace for post-sintering treatment, wherein the sintering temperature is 1630 ℃, the temperature is kept for 3 hours, and the atmosphere pressure is 180 Mpa;
samples were taken at radius 1/2 from the center of the sphere and tested for densities of 3.24, 2.25, and 3.25, respectively. Hardness 1450, 1452, 1458, bending strength 830 MPa.
Example 4
A method for preparing silicon nitride ceramic balls for large-size wind power generation comprises the following implementation steps:
(1) placing 1% of TiC, 4% of yttrium oxide, 4% of aluminum oxide and 1% of tungsten carbide into a ball mill for ball milling for 6 hours;
(2) putting 90% of silicon nitride powder and the auxiliary agent obtained in the step (1) into a circulating stirring mill for full fusion for 6 hours;
(3) atomizing the slurry obtained in the step (2) through closed spray granulation to obtain spherical particles with the particle size of 100-200 microns;
(4) putting the powder obtained in the step (3) into a customized ball making grinding tool, and putting the powder into cold isostatic pressing for ball forming pressing, wherein the pressure is 180Mpa, and the pressure maintaining time is 120S;
(5) trimming the biscuit balls pressed in the step (4) to remove redundant excess materials;
(6) putting the biscuit balls obtained in the step (5) into an atmosphere pressure sintering furnace for sintering, wherein the sintering temperature is 1750 ℃ and the pressure is 10 MPa;
(7) putting the silicon nitride blank ball obtained in the step (6) into a hot isostatic pressing sintering furnace for post-sintering treatment, wherein the sintering temperature is 1650 ℃, the temperature is kept for 3 hours, and the atmosphere pressure is 180 Mpa;
samples were taken at radius 1/2 from the center of the sphere and tested for densities of 3.25, 2.25, and 3.26, respectively. 1460, 1462, 1468 and 840 MPa.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method for preparing silicon nitride ceramic balls for large-size wind power generation is characterized in that the method modifies silicon nitride powder by adding nano TiC, and the method comprises the following steps:
nanometer TiC and sintering aid are premixed, and then dispersed and mixed with silicon nitride powder through an efficient circulating stirring mill.
2. The method for preparing the silicon nitride ceramic balls for the large-size wind power generation as claimed in claim 1, wherein the silicon nitride ceramic balls are prepared from the following raw materials in parts by weight: the content of silicon nitride is 90-95%, the content of nano titanium carbide is 1-2%, and the content of sintering aid is 4-8%.
3. The method of preparing large-sized silicon nitride ceramic balls for wind power generation according to claim 1 or 2, wherein: the sintering aid is one or more of yttrium oxide, magnesium oxide, aluminum oxide and tungsten carbide.
4. The method for preparing silicon nitride ceramic balls for large-size wind power generation according to claim 3, comprising the following steps:
(1) premixing nano TiC and a sintering aid;
(2) then evenly mixing the silicon nitride powder with the mixture;
(3) granulating the mixed powder to form powder for standby;
(4) pressing and molding the powder to be used formed in the step (3) to form a ball blank;
(5) shaping the pressed ball blank to prepare a bearing ball biscuit meeting the requirements;
(6) carrying out air pressure sintering on the bearing ball biscuit obtained in the step (5) to prepare an air pressure sintering blank ball;
(7) and (4) carrying out hot isostatic pressing treatment on the air pressure sintering blank ball obtained in the step (6) after sintering.
5. The method for preparing silicon nitride ceramic balls for large-size wind power generation according to claim 4, wherein the phase content of the silicon nitride powder is greater than 92%.
6. The method for preparing silicon nitride ceramic balls for large-size wind power generation according to claim 4, wherein the sintering temperature in step (6) is 1740-1900 ℃, the temperature is maintained for 4 hours, the total sintering time is 15-20 hours, and the maximum pressure of the nitrogen atmosphere is 8-20 MPa.
7. The method of claim 6, wherein the sintering temperature is 1780 ℃ to 1850 ℃.
8. The method for preparing silicon nitride ceramic balls for large-size wind power generation according to claim 4, wherein the hot isostatic pressing treatment temperature in step (7) is 1600 ℃ to 1700 ℃, the holding time is 2 to 4 hours, and the pressure is 160MPa to 200 MPa.
9. The method for preparing silicon nitride ceramic balls for large-size wind power generation according to claim 4, wherein the premixing time of the nano TiC and the sintering aid in the step (1) is 4-6h, and the uniform mixing time with the silicon nitride powder in the step (2) is 4-6 h.
10. The method for preparing silicon nitride ceramic balls for large-sized wind power generation according to claim 4, wherein the powder to be used in step (4) is charged into a special ball-making grinding tool and placed into a cold isostatic press for pressing and molding, and the pressure is set to be between 180MPa and 260 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420109.6A CN111548163B (en) | 2020-05-18 | 2020-05-18 | Method for preparing silicon nitride ceramic ball for large-size wind power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420109.6A CN111548163B (en) | 2020-05-18 | 2020-05-18 | Method for preparing silicon nitride ceramic ball for large-size wind power generation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111548163A true CN111548163A (en) | 2020-08-18 |
| CN111548163B CN111548163B (en) | 2022-07-15 |
Family
ID=71997168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010420109.6A Active CN111548163B (en) | 2020-05-18 | 2020-05-18 | Method for preparing silicon nitride ceramic ball for large-size wind power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111548163B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113135762A (en) * | 2021-05-13 | 2021-07-20 | 中材高新氮化物陶瓷有限公司 | Large-size silicon nitride ceramic ball and preparation method thereof |
| CN113185302A (en) * | 2021-06-10 | 2021-07-30 | 灵石鸿润和新材料有限公司 | Large-size silicon nitride ceramic ball for wind power generation and preparation method and application thereof |
| CN113800919A (en) * | 2021-10-26 | 2021-12-17 | 中材高新氮化物陶瓷有限公司 | High-precision silicon nitride ceramic microsphere and preparation method and application thereof |
| WO2022041415A1 (en) * | 2020-08-24 | 2022-03-03 | 中材高新氮化物陶瓷有限公司 | Method for preparing high-reliability long-service life silicon nitride ceramic ball for aviation bearing |
| CN116444277A (en) * | 2022-01-07 | 2023-07-18 | 埃克诺新材料（大连）有限公司 | Preparation method of oversized silicon nitride ceramic ball for oversized bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004067432A (en) * | 2002-08-06 | 2004-03-04 | Sumitomo Electric Ind Ltd | Ceramic composite sintered body and its manufacturing process |
| CN101538162A (en) * | 2009-01-21 | 2009-09-23 | 北京中材人工晶体有限公司 | Preparation method for high reliability large-scale silicon nitride ceramic material |
| CN104119079A (en) * | 2014-08-04 | 2014-10-29 | 上海泛联科技股份有限公司 | Sintering method for improving performance consistency of silicon nitride material |
| CN107021768A (en) * | 2017-04-18 | 2017-08-08 | 扬州北方三山工业陶瓷有限公司 | A kind of high-performance silicon carbide ceramic dewatering element and preparation method thereof |
| CN107399974A (en) * | 2016-05-22 | 2017-11-28 | 河北高富氮化硅材料有限公司 | A kind of method added fluoride and prepare high heat conduction silicon nitride ceramics |
-
2020
- 2020-05-18 CN CN202010420109.6A patent/CN111548163B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004067432A (en) * | 2002-08-06 | 2004-03-04 | Sumitomo Electric Ind Ltd | Ceramic composite sintered body and its manufacturing process |
| CN101538162A (en) * | 2009-01-21 | 2009-09-23 | 北京中材人工晶体有限公司 | Preparation method for high reliability large-scale silicon nitride ceramic material |
| CN104119079A (en) * | 2014-08-04 | 2014-10-29 | 上海泛联科技股份有限公司 | Sintering method for improving performance consistency of silicon nitride material |
| CN107399974A (en) * | 2016-05-22 | 2017-11-28 | 河北高富氮化硅材料有限公司 | A kind of method added fluoride and prepare high heat conduction silicon nitride ceramics |
| CN107021768A (en) * | 2017-04-18 | 2017-08-08 | 扬州北方三山工业陶瓷有限公司 | A kind of high-performance silicon carbide ceramic dewatering element and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 江东亮等: "《中国材料工程大典 第8卷 无机非金属材料工程 上》", 31 March 2006, 化学工业出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041415A1 (en) * | 2020-08-24 | 2022-03-03 | 中材高新氮化物陶瓷有限公司 | Method for preparing high-reliability long-service life silicon nitride ceramic ball for aviation bearing |
| CN113135762A (en) * | 2021-05-13 | 2021-07-20 | 中材高新氮化物陶瓷有限公司 | Large-size silicon nitride ceramic ball and preparation method thereof |
| CN113135762B (en) * | 2021-05-13 | 2022-03-08 | 中材高新氮化物陶瓷有限公司 | Large-size silicon nitride ceramic ball and preparation method thereof |
| WO2022237267A1 (en) * | 2021-05-13 | 2022-11-17 | 中材高新氮化物陶瓷有限公司 | Large-size silicon nitride ceramic ball, preparation method therefor and use thereof |
| CN113185302A (en) * | 2021-06-10 | 2021-07-30 | 灵石鸿润和新材料有限公司 | Large-size silicon nitride ceramic ball for wind power generation and preparation method and application thereof |
| CN113800919A (en) * | 2021-10-26 | 2021-12-17 | 中材高新氮化物陶瓷有限公司 | High-precision silicon nitride ceramic microsphere and preparation method and application thereof |
| CN116444277A (en) * | 2022-01-07 | 2023-07-18 | 埃克诺新材料（大连）有限公司 | Preparation method of oversized silicon nitride ceramic ball for oversized bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111548163B (en) | 2022-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111548163B (en) | Method for preparing silicon nitride ceramic ball for large-size wind power generation | |
| WO2022041255A1 (en) | Method for preparing nano-phase reinforced nickel-based high-temperature alloy using micron ceramic particles | |
| CN111378888B (en) | Nano particle interface reinforced Ti (C, N) -based metal ceramic material with high nitrogen content and preparation method thereof | |
| CN107245621B (en) | A kind of wear-and corrosion-resistant molybdenum alloy and preparation method thereof | |
| CN109321768B (en) | ZrO (ZrO)2-Y2O3Particle-reinforced molybdenum alloy and preparation method thereof, and composite powder and preparation method thereof | |
| CN110340345B (en) | Nano-phase reinforced copper-based diamond tool matrix powder and matrix preparation method | |
| CN111172443B (en) | High-comprehensive-performance hard alloy cutter material and preparation method thereof | |
| CN109852862A (en) | A kind of high rigidity composite hard alloy and the preparation method and application thereof | |
| CN110204337B (en) | Preparation method of boron carbide ceramic material for aerospace gyroscope bearing and boron carbide ceramic material | |
| CN113681024B (en) | Method for preparing tungsten metal part based on feeding printing | |
| CN105669209A (en) | Silicon nitride ceramic material, and preparation method and application thereof | |
| CN113880557A (en) | AL2O3-cBN-based ceramic cutting tool material and method for producing the same | |
| CN110066952B (en) | Preparation method of zirconium oxide reinforced molybdenum alloy bar | |
| CN102943185A (en) | Preparation method of aluminum oxide dispersion-strengthened copper | |
| CN114290251B (en) | Fe-based cBN grinding wheel and preparation method thereof | |
| CN111826567B (en) | Alloy-reinforced titanium carbonitride-based composite material and preparation method thereof | |
| CN115070042A (en) | Rare earth oxide modified hard alloy turning tool blade and preparation method thereof | |
| CN111659880B (en) | Material formula for high-precision powder metallurgy part | |
| CN103030399B (en) | Preparation method of high-density compound ceramic ball | |
| CN114250385A (en) | Preparation method of in-situ authigenic titanium-copper alloy reinforced titanium-based composite material | |
| CN116926399B (en) | Special ceramic material and preparation method and application thereof | |
| CN111362703B (en) | Polycrystalline cubic boron nitride cutter sintered at low pressure and preparation method | |
| CN115140752B (en) | Dispersed closed-pore sintered alumina pretreated based on hydrothermal method and preparation method thereof | |
| CN114134386B (en) | Preparation method of WC particle reinforced Mo-based alloy and product thereof | |
| CN111893337B (en) | Preparation method of high-temperature alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |