CN109851364A - A kind of silicon carbide extrusion molding production technology - Google Patents
A kind of silicon carbide extrusion molding production technology Download PDFInfo
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- CN109851364A CN109851364A CN201910310829.4A CN201910310829A CN109851364A CN 109851364 A CN109851364 A CN 109851364A CN 201910310829 A CN201910310829 A CN 201910310829A CN 109851364 A CN109851364 A CN 109851364A
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Abstract
The invention discloses a kind of silicon carbide extrusion molding production technologies, belong to silicon carbide processing technique field.The following steps are included: the silicon carbide micro-powder B that silicon carbide micro-powder A and the D50 value that D50 value is 35-40 μm is 5.5-6.0 μm is sufficiently mixed 10 minutes by (1), silicon carbide admixed finepowder is obtained；(2), aging 24 hours of slurry after ball milling；(3), extrusion molding；(4), dry in the shade tubing biscuit of being formed；(5) it dries；(6), high temperature sintering obtains silicon carbide tubing.Silicon carbide extrusion molding process of the present invention, extrusion molding finished product rate is high, can effectively reduce product and breaks base rate, and product strength is high after knot, and sintered products qualification rate is up to 90%.
Description
Technical field
The present invention relates to a kind of silicon carbide extrusion molding production technologies, belong to silicon carbide processing technique field.
Background technique
Silicon carbide ceramics has a variety of good characteristics such as high rigidity, high decomposition temperature, high thermal conductivity, low bulk, corrosion-resistant,
It exhibits one's skill to the full in fields such as machinery, petroleum, auto industrys.It is rapid with modern national defense, space technology and energy technology
Development, silicon carbide as high-performance ceramics, especially high performance structure ceramic using increasingly extensive, such as high-temperature heat engine material
Expect the main candidate material of combustion chamber, turbine blade, turbocharger rotor, high temperature nozzle of high temperature gas turbine etc.
Material.At the same time, the requirement to the complexity of silicon carbide ceramics geometry, toughness, intensity and reliability is higher and higher.
The design feature of silicon carbide determines a series of its excellent performances, high intensity, high rigidity, high temperature resistant, it is anti-oxidant,
High heat conductance, low thermal expansion rate are not corroded with excellent chemical stability and by most of acid-base solution.Silicon carbide
Ceramic material also has high-temperature oxidation resistant characteristic.The protective film of Surface Creation densification when high-temperature oxydation, it is suppressed that oxygen it is further
Oxidation, therefore there is excellent antioxygenic property.The excellent performance that silicon carbide ceramics has make its machinery, chemical industry, the energy,
Important application prospect is shown in the application field of the use environments such as military project harshness.
Summary of the invention
The object of the present invention is to provide a kind of silicon carbide extrusion molding production technology, blank strength made from the technique
It is higher, it is not easy to crack in demoulding or drying process.
The technical scheme is that a kind of silicon carbide extrusion molding production technology, comprising the following steps:
(1), the silicon carbide micro-powder B that silicon carbide micro-powder A and the D50 value that D50 value is 35-40 μm is 5.5-6.0 μm is sufficiently mixed
10 minutes, obtain silicon carbide admixed finepowder；
(2), ball milling: weighing silicon carbide admixed finepowder, dispersing agent, sintering aid and deionized water according to a certain percentage, is added dropwise
Ammonium hydroxide adjusts its value to 10.5, is that 3:1 takes agate abrading-ball according to ratio of grinding media to material, is put into ball grinder, ball grinder is placed on light-duty tank
Ball milling 20 hours on grinding machine；Then aging 24 hours of slurry；
(3), extrusion molding: silicon carbide slurry being put into extruder and carries out extrusion molding, obtains tubing biscuit；
(4), dry in the shade tubing biscuit of being formed: tubing biscuit being transferred to and is dried in the shade on shaping tool, tubing biscuit dries in the shade 2 in interior
It；
(5) dry: will be put into thermostatic drying chamber from tubing biscuit, 55 DEG C it is 8-12 hours dry after take out；
(6), high temperature sintering: by tubing biscuit be put into vacuum hotpressing stove carried out under protection of ammonia atmosphere it is normal pressure-sintered, by 30 DEG C/
Min speed is first warming up to 1500 DEG C, is then warming up to 1600 DEG C with the speed of 15 DEG C/min and keeps the temperature 2 hours, heat preservation terminates cooling
Sintered article is taken out in blow-on when to 50 DEG C.
The dispersing agent is polyethyleneimine or tetramethylammonium hydroxide.
The sintering aid is aluminium yttrium.
The beneficial effects of the present invention are: silicon carbide extrusion molding process of the present invention, extrusion molding finished product rate is high, can have
Effect reduces product and breaks base rate, and product strength is high after knot, and sintered products qualification rate is up to 90%.
Specific embodiment
Embodiment 1
A kind of silicon carbide extrusion molding production technology, comprising the following steps:
(1), the silicon carbide micro-powder B that silicon carbide micro-powder A and the D50 value that D50 value is 40 μm is 5.5 μm is sufficiently mixed 10 minutes,
Obtain silicon carbide admixed finepowder；
(2), ball milling: weighing silicon carbide admixed finepowder, dispersing agent, sintering aid and deionized water according to a certain percentage, is added dropwise
Ammonium hydroxide adjusts its value to 10.5, is that 3:1 takes agate abrading-ball according to ratio of grinding media to material, is put into ball grinder, ball grinder is placed on light-duty tank
Ball milling 20 hours on grinding machine；Then aging 24 hours of slurry；
(3), extrusion molding: silicon carbide slurry being entered and carries out extrusion molding in extruder, obtains tubing biscuit；
(4), dry in the shade tubing biscuit of being formed: tubing biscuit being transferred to and is dried in the shade on shaping tool, tubing biscuit dries in the shade 2 in interior
It；
(5) it dries: will be put into thermostatic drying chamber from tubing biscuit, 55 DEG C are taken out after drying 8 hours；
(6), high temperature sintering: by tubing biscuit be put into vacuum hotpressing stove carried out under protection of ammonia atmosphere it is normal pressure-sintered, by 30 DEG C/
Min speed is first warming up to 1500 DEG C, is then warming up to 1600 DEG C with the speed of 15 DEG C/min and keeps the temperature 2 hours, heat preservation terminates cooling
Sintered article is taken out in blow-on when to 50 DEG C.
The dispersing agent is tetramethylammonium hydroxide.
The sintering aid is aluminium yttrium.
The silicon carbide admixed finepowder, dispersing agent, sintering aid mass ratio be 10:1.5:1.
Embodiment 2
A kind of silicon carbide extrusion molding production technology, comprising the following steps:
(1), the silicon carbide micro-powder B that silicon carbide micro-powder A and the D50 value that D50 value is 35 μm is 6.0 μm is sufficiently mixed 10 minutes,
Obtain silicon carbide admixed finepowder；
(2), ball milling: weighing silicon carbide admixed finepowder, dispersing agent, sintering aid and deionized water according to a certain percentage, is added dropwise
Ammonium hydroxide adjusts its value to 10.5, is that 3:1 takes agate abrading-ball according to ratio of grinding media to material, is put into ball grinder, ball grinder is placed on light-duty tank
Ball milling 20 hours on grinding machine；Then aging 24 hours of slurry；
(3), extrusion molding: silicon carbide slurry being entered and carries out extrusion molding in extruder, obtains tubing biscuit；
(4), dry in the shade tubing biscuit of being formed: tubing biscuit being transferred to and is dried in the shade on shaping tool, tubing biscuit dries in the shade 2 in interior
It；
(5) it dries: will be put into thermostatic drying chamber from tubing biscuit, 55 DEG C are taken out after drying 12 hours；
(6), high temperature sintering: by tubing biscuit be put into vacuum hotpressing stove carried out under protection of ammonia atmosphere it is normal pressure-sintered, by 30 DEG C/
Min speed is first warming up to 1500 DEG C, is then warming up to 1600 DEG C with the speed of 15 DEG C/min and keeps the temperature 2 hours, heat preservation terminates cooling
Sintered article is taken out in blow-on when to 50 DEG C.
The dispersing agent is polyethyleneimine.
The sintering aid is aluminium yttrium.
The silicon carbide admixed finepowder, dispersing agent, sintering aid mass ratio be 10:1.5:1.
Claims (3)
1. a kind of silicon carbide extrusion molding production technology, which comprises the following steps:
(1), the silicon carbide micro-powder B that silicon carbide micro-powder A and the D50 value that D50 value is 35-40 μm is 5.5-6.0 μm is sufficiently mixed
10 minutes, obtain silicon carbide admixed finepowder；
(2), ball milling: weighing silicon carbide admixed finepowder, dispersing agent, sintering aid and deionized water according to a certain percentage, is added dropwise
Ammonium hydroxide adjusts its value to 10.5, is that 3:1 takes agate abrading-ball according to ratio of grinding media to material, is put into ball grinder, ball grinder is placed on light-duty tank
Ball milling 20 hours on grinding machine；Then aging 24 hours of slurry；
(3), extrusion molding: silicon carbide slurry being put into extruder and carries out extrusion molding, obtains tubing biscuit；
(4), dry in the shade tubing biscuit of being formed: tubing biscuit being transferred to and is dried in the shade on shaping tool, tubing biscuit dries in the shade 2 in interior
It；
(5) dry: will be put into thermostatic drying chamber from tubing biscuit, 55 DEG C it is 8-12 hours dry after take out；
(6), high temperature sintering: by tubing biscuit be put into vacuum hotpressing stove carried out under protection of ammonia atmosphere it is normal pressure-sintered, by 30 DEG C/
Min speed is first warming up to 1500 DEG C, is then warming up to 1600 DEG C with the speed of 15 DEG C/min and keeps the temperature 2 hours, heat preservation terminates cooling
Sintered article is taken out in blow-on when to 50 DEG C.
2. a kind of silicon carbide extrusion molding production technology according to claim 1, which is characterized in that the dispersing agent is poly-
Aziridine or tetramethylammonium hydroxide.
3. a kind of silicon carbide extrusion molding production technology according to claim 1, which is characterized in that the sintering aid is
Aluminium yttrium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910310829.4A CN109851364A (en) | 2019-04-18 | 2019-04-18 | A kind of silicon carbide extrusion molding production technology |
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| CN201910310829.4A CN109851364A (en) | 2019-04-18 | 2019-04-18 | A kind of silicon carbide extrusion molding production technology |
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| CN201910310829.4A Withdrawn CN109851364A (en) | 2019-04-18 | 2019-04-18 | A kind of silicon carbide extrusion molding production technology |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110175264A1 (en) * | 2009-07-24 | 2011-07-21 | Pujari Vimal K | High Toughness Ceramic Composites |
| CN104557047A (en) * | 2014-12-31 | 2015-04-29 | 台州东新密封有限公司 | Preparation method for extruded pressureless sintered silicon carbide pipe |
| CN104557049A (en) * | 2015-01-22 | 2015-04-29 | 台州东新密封有限公司 | Preparation method of extrusion-molded closed end reaction sintered silicon carbide ceramic pipe |
| CN105461306A (en) * | 2015-11-16 | 2016-04-06 | 石婷 | High-strength silicon carbide ceramic pipe and manufacturing method thereof |
| CN105948755A (en) * | 2016-05-30 | 2016-09-21 | 山田研磨材料有限公司 | Production method of silicon carbide micro powder applied to pressureless sintering |
| CN106380202A (en) * | 2016-08-26 | 2017-02-08 | 山田研磨材料有限公司 | Compounding method for silicon carbide sintering extrusion molding |
| CN107244920A (en) * | 2017-07-04 | 2017-10-13 | 黑龙江科技大学 | Carborundum injection forming sintering method |
-
2019
- 2019-04-18 CN CN201910310829.4A patent/CN109851364A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110175264A1 (en) * | 2009-07-24 | 2011-07-21 | Pujari Vimal K | High Toughness Ceramic Composites |
| CN104557047A (en) * | 2014-12-31 | 2015-04-29 | 台州东新密封有限公司 | Preparation method for extruded pressureless sintered silicon carbide pipe |
| CN104557049A (en) * | 2015-01-22 | 2015-04-29 | 台州东新密封有限公司 | Preparation method of extrusion-molded closed end reaction sintered silicon carbide ceramic pipe |
| CN105461306A (en) * | 2015-11-16 | 2016-04-06 | 石婷 | High-strength silicon carbide ceramic pipe and manufacturing method thereof |
| CN105948755A (en) * | 2016-05-30 | 2016-09-21 | 山田研磨材料有限公司 | Production method of silicon carbide micro powder applied to pressureless sintering |
| CN106380202A (en) * | 2016-08-26 | 2017-02-08 | 山田研磨材料有限公司 | Compounding method for silicon carbide sintering extrusion molding |
| CN107244920A (en) * | 2017-07-04 | 2017-10-13 | 黑龙江科技大学 | Carborundum injection forming sintering method |
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Application publication date: 20190607 |