CN105819864A - Long-life silicon nitride material for bearing balls, and preparation method thereof - Google Patents
Long-life silicon nitride material for bearing balls, and preparation method thereof Download PDFInfo
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- CN105819864A CN105819864A CN201610131035.8A CN201610131035A CN105819864A CN 105819864 A CN105819864 A CN 105819864A CN 201610131035 A CN201610131035 A CN 201610131035A CN 105819864 A CN105819864 A CN 105819864A
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- silicon nitride
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- 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
- C04B35/58—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
- C04B35/584—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 nitride
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- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
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- 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
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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- 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
Abstract
The invention discloses a long-life silicon nitride material for bearing balls. The long-life silicon nitride material comprises a silicon nitride main material and a total sintering aid, and is prepared from 89-97wt% of silicon nitride, 1-5wt% of Y2O3, 1-5wt% of Al2O3 and 0.5-2.5wt% of AlN. AlN is used to substitute parts of Al2O3, so the compactness of the obtained material reaches 99.8%, and the porosity is smaller than 0.5%, and a single ball has 3 times longer rolling contact fatigue life than a single ball made of a traditional material. The long-life silicon nitride material can adapt to high rotating speeds, can bear high load capacity, and has the advantages of high strength, high running precision and long life.
Description
Technical field
The invention belongs to advanced structural ceramic material technical field, be specifically related to a kind of bearing ball and use
Long-life silicon nitride material, the invention still further relates to the preparation method of this material.
Background technology
In high-speed bearing is applied, it is the most special that silicon nitride is considered to have optimal mechanical-physical
Property.Silicon nitride ceramic ball, compared with steel ball, has low-density, low-friction coefficient and anti abrasive
Performance.Compared with steel ball bearing, the combined bearing equipped with silicon nitride ceramic ball possesses higher
Rotating speed, lower temperature rise, and longer life-span.Along with machine tool accuracy and reliability requirement
Improve, more and more higher to the life expectance of combined bearing, simultaneously need to bearing can bear
Higher application load, this is accomplished by, and service life is longer and the higher silicon nitride material of intensity.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of and has high intensity, the axle of life-span length
Hold ball silicon nitride material.
Meanwhile, the present invention also provides for the preparation method of this silicon nitride material.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of bearing ball long-life silicon nitride material, including silicon nitride major ingredient and total sintering aid,
The percentage by weight of the total sintering aid of described material is less than 8%.
Further, above-mentioned material is prepared from by following components in percentage by weight:
Silicon nitride: 89-97wt%
Y2O3: 1-5wt%
Al2O3: 1-5wt%
AlN:0.5～2.5wt%.
Further, above-mentioned material is prepared from by following components in percentage by weight:
Silicon nitride: 95wt%
Y2O3: 2.8wt%
Al2O3: 1.2wt%
AlN:1wt%.
The present invention also provides for this bearing ball preparation method with long-life silicon nitride material, including
Following steps:
(1), ball milling: each raw material is put into horizontal ball-grinding machine, uses silicon nitride ball as mill
Being situated between, ethanol or deionized water are as ball-milling medium；
(2), molding: powder uses dry-pressing, isostatic pressed, cast, inject and be cast in arbitrarily
A kind of molding mode；
(3), row is viscous processes: the biscuit after molding first carries out arranging viscous process, and the viscous temperature of row is less than
1400 degree, flowing nitrogen is protected；
(4), sintering: gas pressure sintering, sintering temperature is 1750～2000 DEG C, temperature retention time
1～10h, N2Pressure is less than 10MPa；Carrying out HIP sintering again, sintering temperature compares air pressure
Sintering temperature is low 0～50 degree, N2Pressure is more than 120MPa.
In above-mentioned ball milling step, the rotating speed of ball-grinding machine is announced is 300～360r/min, Ball-milling Time
It is preferably 6～10h.
Compared with prior art, the invention have the benefit that
Inventive formulation is reasonable, uses AlN to replace part Al2O3, the material density that obtains
Reaching 99.8%, the porosity is less than 0.5%, and single ball rolling contact fatigue life compares traditional material
Improve 3 times.The silicon nitride material of the present invention adapts to higher rotation speed, can bear high load capacity energy
Power, it is adaptable to the environment of higher temperature, have intensity mechanical property high, overall good, operating essence
The high good characteristic with length in service life of degree.
Detailed description of the invention
Embodiment 1
A kind of bearing ball long-life silicon nitride material, is prepared by following components in percentage by weight
Form:
Silicon nitride: 95wt%
Y2O3: 2.8wt%
Al2O3: 1.2wt%
AlN:1wt%.
Directly dry after using ethanol batch mixing uniformly during preparation, then cold isostatic compaction,
1880 DEG C, sinter 2h under 8MPa nitrogen, be then put into high temperature insostatic pressing (HIP) stove, 140MPa,
Sintering 90 minutes at 1830 DEG C, the material density obtained reaches 99.8%, is fabricated to 6.35
G5 rank essence ball, test fatigue life is 16 times (L10 life-spans) of traditional material.
Embodiment 2
A kind of bearing ball long-life silicon nitride material, including silicon nitride major ingredient and total sintering aid,
It is prepared from by following components in percentage by weight:
Silicon nitride: 93wt%
Y2O3: 3wt%
Al2O3: 3wt%
AlN:1wt%.
Preparation method is same as embodiment 1.
Embodiment 3
A kind of bearing ball long-life silicon nitride material, including silicon nitride major ingredient and total sintering aid,
It is prepared from by following components in percentage by weight:
Silicon nitride: 96wt%
Y2O3: 1.5wt%
Al2O3: 1.5wt%
AlN:1wt%.
Preparation method is same as embodiment 1.
Those of ordinary skill in the art is it should be appreciated that above embodiment is only to use
The present invention is described, and is not used as limitation of the invention, as long as in the essence of the present invention
In scope, to the change of embodiment described above, modification all by the right in the present invention that falls
In claimed range.
Claims (4)
1. a bearing ball long-life silicon nitride material, including silicon nitride major ingredient with always help burning
Agent, it is characterised in that the percentage by weight of the total sintering aid of described material is less than 8%.
2. a kind of bearing ball long-life silicon nitride material as claimed in claim 1, it is special
Levying and be, described material is prepared from by following components in percentage by weight:
Silicon nitride: 89-97wt%
Y2O3: 1-5wt%
Al2O3: 1-5wt%
AlN:0.5～2.5wt%.
3. a kind of bearing ball long-life silicon nitride material as claimed in claim 1, it is special
Levy and be: described material is prepared from by following components in percentage by weight:
Silicon nitride: 95wt%
Y2O3: 2.8wt%
Al2O3: 1.2wt%
AlN:1wt%.
4. a kind of bearing ball described in an any one of claims 1 to 3 nitrogenized with the long-life
The preparation method of silicon materials, it is characterised in that comprise the steps:
(1), ball milling: each raw material is put into horizontal ball-grinding machine, uses silicon nitride ball as mill
Being situated between, ethanol or deionized water are as ball-milling medium；
(2), molding: powder uses dry-pressing, isostatic pressed, cast, inject and be cast in arbitrarily
A kind of molding mode；
(3), row is viscous processes: the biscuit after molding first carries out arranging viscous process, and the viscous temperature of row is less than
1400 degree, flowing nitrogen is protected；
(4), sintering: gas pressure sintering, sintering temperature is 1750～2000 DEG C, temperature retention time
1～10h, N2Pressure is less than 10MPa；Carrying out HIP sintering again, sintering temperature compares air pressure
Sintering temperature is low 0～50 degree, N2Pressure is more than 120MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610131035.8A CN105819864A (en) | 2016-03-08 | 2016-03-08 | Long-life silicon nitride material for bearing balls, and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610131035.8A CN105819864A (en) | 2016-03-08 | 2016-03-08 | Long-life silicon nitride material for bearing balls, and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362704A (en) * | 2020-03-19 | 2020-07-03 | 西安澳秦新材料有限公司 | High-thermal-conductivity silicon nitride ceramic and preparation method thereof |
| CN112745127A (en) * | 2020-12-30 | 2021-05-04 | 广东工业大学 | Silicon nitride ceramic cutter and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101066871A (en) * | 2007-06-07 | 2007-11-07 | 西北第二民族学院 | Liquid phase sintering process of high strength and high toughness SiN ceramic |
| CN102795860A (en) * | 2012-07-11 | 2012-11-28 | 北京中材人工晶体研究院有限公司 | Method for preparing silicon nitride ceramic balls |
| CN103224398A (en) * | 2013-04-26 | 2013-07-31 | 湖南凯新陶瓷科技有限公司 | Nitride ceramic material microwave sintering method |
-
2016
- 2016-03-08 CN CN201610131035.8A patent/CN105819864A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101066871A (en) * | 2007-06-07 | 2007-11-07 | 西北第二民族学院 | Liquid phase sintering process of high strength and high toughness SiN ceramic |
| CN102795860A (en) * | 2012-07-11 | 2012-11-28 | 北京中材人工晶体研究院有限公司 | Method for preparing silicon nitride ceramic balls |
| CN103224398A (en) * | 2013-04-26 | 2013-07-31 | 湖南凯新陶瓷科技有限公司 | Nitride ceramic material microwave sintering method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362704A (en) * | 2020-03-19 | 2020-07-03 | 西安澳秦新材料有限公司 | High-thermal-conductivity silicon nitride ceramic and preparation method thereof |
| CN112745127A (en) * | 2020-12-30 | 2021-05-04 | 广东工业大学 | Silicon nitride ceramic cutter and preparation method and application thereof |
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Application publication date: 20160803 |