CN104909786A - Alumina fiber reinforced calcium oxide ceramic matrix composite and preparation method thereof - Google Patents
Alumina fiber reinforced calcium oxide ceramic matrix composite and preparation method thereof Download PDFInfo
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- CN104909786A CN104909786A CN201510252282.9A CN201510252282A CN104909786A CN 104909786 A CN104909786 A CN 104909786A CN 201510252282 A CN201510252282 A CN 201510252282A CN 104909786 A CN104909786 A CN 104909786A
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Abstract
The present invention discloses an alumina fiber reinforced calcium oxide ceramic matrix composite and a preparation method thereof, the alumina fiber reinforced calcium oxide ceramic matrix composite is characterized by comprising the following raw materials by weight: 8-10 parts of potassium feldspar, 3-5 parts of flake graphite, 60-70 parts of calcium oxide, 10-15 parts of modified alumina fiber, 0.2-0.4 part of dibenzoyl peroxide, 3-5 parts of vinyl propionate, 0.01-0.02 part of sodium persulfate, 1-2 parts of sodium tripolyphosphate, 2-3 parts of epoxy resin, 20-25 parts of ethanol, and 30-50 parts of deionized water; the antioxidant treated alumina fiber added in the alumina fiber reinforced calcium oxide ceramic matrix composite is used as a ceramic reinforcing phase, and has the characteristics of ceramic toughness reinforcing properties, mechanical properties, abrasion resistance, hardness and high temperature resistance, a variety of complex shapes and sizes of ceramic parts can be prepared by the preparation method, blank body solidification shaping time is short and manageable, forming composition is uniform, density is uniform, defects are less, and the problem of the gradient distribution of density is not easy to appear.
Description
Technical field
the present invention relates to a kind of sapphire whisker and strengthen calcium oxide ceramics based composites and preparation method thereof, belong to technical field of ceramic production.
Background technology
FRCMC is a member young in ceramic matric composite, FRCMC has the advantages such as high temperature resistant, wear-resisting, high temperature creep-resisting, thermal conductivity are low, thermal expansivity is low, chemerosiveness resistent is good, being widely used under resin base and metal matrix and even some ceramic matric composites can not meet the working condition of performance requriements, is one of most active research field in current matrix material.In fiber reinforced ceramic-base body material, both are by being compounded to form organic whole, when applied load acts on matrix material, body material can transmit a part of load on fiber, reduce the load of ceramic matrix material itself, when fiber meet with stresses be greater than itself intensity time, fiber can rupture, the fiber of fracture is extracted from body material, thus consumes crackle diffusion energy.When crack propagation is to fiber, due to the uneven of internal stress and interfacial effect, crackle is caused to turn to along fiber peripheral surface, thus consume crack propagation energy, due to crack deflection, crack propagation path is spination, add the surface energy of crackle, serve reinforced effects.Crackle is formed in matrices of composite material and after expanding, the bridging district that formation one is made up of fiber by its most advanced and sophisticated afterbody, produce bridge effect, the appearance in bridging district will make crackle in expansion, consume more energy.The ultimate principle of gel injection molding and forming technology adds low viscous organic monomer and linking agent in the ceramic size of low viscosity, high solid volume fraction, when introducing initiator after injection molding, there is home position polymerization reaction under certain conditions in the organic monomer in slurry and linking agent, form firm interlinkage reticulated structure, make slurry solidify in place immediately, thus make ceramic body formed in situ, then carry out the demoulding, drying, organics removal, sintering, required ceramic component can be obtained.
Calcium oxide ceramics has thermodynamic stability, can use under high temperature (2000 ° of C), there is the effect of good resist melt metal attack and the erosion of resist melt calcium phosphate, but shortcoming is exactly easy when high temperature and oxide compound generation frit reaction, easily cause the reduction of pottery corrosion and hardness, sapphire whisker has outstanding resistance to elevated temperatures, heat insulating ability is good, thermal capacity is little, good resistance to chemical corrosion, good with the wetting property of matrix, surface reaction is less, sapphire whisker strengthens ceramic matric composite and has good resistance to elevated temperatures and higher fracture toughness property, the mechanical property of matrix material, wear resistance, hardness is improved, thermal expansivity reduces, and sapphire whisker is through antioxidation treatment, work long hours under high-temperature oxidation environment, patience fracture can not be formed in because of generation oxidation, and advantage of lower cost, a kind of most potential high temperature resistant, the material of erosion and high rigidity.
Summary of the invention
The object of this invention is to provide a kind of sapphire whisker and strengthen calcium oxide ceramics based composites and preparation method thereof, reduce the shortcoming that pottery is perishable, rupture, enhance strength and stability, its performance is used widely.
In order to realize object of the present invention, the present invention is by following scheme implementation:
A kind of sapphire whisker strengthens calcium oxide ceramics based composites and preparation method thereof, is made up: potassium felspar sand 8-10, crystalline flake graphite 3-5, calcium oxide 60-70, modified oxidized aluminum fiber 10-15, dibenzoyl peroxide 0.2-0.4, propionate 3-5, Sodium Persulfate 0.01-0.02, tripoly phosphate sodium STPP 1-2, epoxy resin 2-3, ethanol 20-25, deionized water 30-50 of the raw material of following weight part;
The preparation method of described modified oxidized aluminum fiber is: sapphire whisker is soaked 1-2 hour in acetone, uses distilled water flushing 2-3 time, dry for standby after taking out, the ethanol mixing of the tetrabutyl titanate of 10-15 weight part and 150-180 weight part is added in the flask with magnetic stirring apparatus, by the deionized water of 2-3 weight part, the hydrochloric acid of 0.2-0.4 weight part and the ethanol of 2-5 weight part fully mix, slowly be added drop-wise in flask, add the molybdenum oxide powder of 2-4 weight part again, stir 30-40 minute, sapphire whisker for subsequent use is added in gel under vacuum tightness is 0.09-0.1MPa, floods 1-2 hour, dry under 70-80 ° of C after taking-up, repeatable operation like this 2-3 time, last under the protection of high-purity argon gas under 500-600 ° of C pyroreaction 1-2 hour.
A kind of sapphire whisker of the present invention strengthens calcium oxide ceramics based composites and preparation method thereof, it is characterized in that, is made up of following concrete steps:
(1) calcium oxide and potassium felspar sand are added in ball mill, ask as ball-milling medium using aluminum oxide, material ball ratio is 1:2, again propionate, Sodium Persulfate are added in the mixing solutions of ethanol and deionized water, adding after dissolving after tripoly phosphate sodium STPP, epoxy resin and modified oxidized aluminum fiber stir is added in ball mill, ball milling 20-40 minute;
(2) slurry that ball milling obtains is vacuumized, take out and within 2-5 minute, add dibenzoyl peroxide in backward slurry and continue to stir, then slurry to be injected into after in laminated glass mould in vacuum drying oven dry 1-2 hour under 60-80 ° of C;
(3) by the wet base demoulding at room temperature seasoning 1-2 days in step (2), then at 95-100 ° of C temperature, humidity is dry 1-2 days under the condition of 60-70%, remaining one-tenth is distributed into plasma spraying powder conveyer in billet surface spraying evenly;
(4) by the base substrate of step (3) at room temperature with the ramp to 200 of 3-5 ° of C/min ° C, again with the ramp to 600 of 1-2 ° of C/min ° C, constant temperature keeps being positioned in vacuum sintering furnace after 1-2 hour, sinters 3-4 hour, can obtain at the temperature of 1400-1600 ° of C.
Advantage of the present invention is: the sapphire whisker that the present invention adds antioxidation treatment has as the wild phase of pottery and strengthens ceramics toughness, mechanical property, wear resistance, hardness and resistant to elevated temperatures characteristic, preparation technology of the present invention can prepare the ceramic part of various complicated shape and size, base substrate to solidify shaping time short and controlled, and moulding composition is even, even density, defect is few, not easily occurs the problem that density gradient distributes.
specific embodiments
Below by specific examples, the present invention is described in detail.
A kind of sapphire whisker strengthens calcium oxide ceramics based composites and preparation method thereof, is made up: potassium felspar sand 10, crystalline flake graphite 5, calcium oxide 68, modified oxidized aluminum fiber 14, dibenzoyl peroxide 0.3, propionate 4, Sodium Persulfate 0.02, tripoly phosphate sodium STPP 2, epoxy resin 3, ethanol 25, deionized water 50 of the raw material of following weight part (kilogram);
The preparation method of described modified oxidized aluminum fiber is: sapphire whisker is soaked 2 hours in acetone, uses distilled water flushing 3 times, dry for standby after taking out; The ethanol mixing of the tetrabutyl titanate of 12 weight parts and 160 weight parts is added in the flask with magnetic stirring apparatus; the hydrochloric acid of the deionized water of 3 weight parts, 0.3 weight part and the ethanol of 5 weight parts are fully mixed; slowly be added drop-wise in flask; add the molybdenum oxide powder of 4 weight parts again; stir 40 minutes; sapphire whisker for subsequent use is added in gel and floods 1 hour under vacuum tightness is 0.09MPa; dry under 80 ° of C after taking-up; repeatable operation like this 3 times, finally under the protection of high-purity argon gas under 600 ° of C pyroreaction 2 hours.
A kind of sapphire whisker of the present invention strengthens calcium oxide ceramics based composites and preparation method thereof, is made up of following concrete steps:
(1) calcium oxide and potassium felspar sand are added in ball mill, ask as ball-milling medium using aluminum oxide, material ball ratio is 1:2, again propionate, Sodium Persulfate are added in the mixing solutions of ethanol and deionized water, adding after dissolving after tripoly phosphate sodium STPP, epoxy resin and modified oxidized aluminum fiber stir is added in ball mill, ball milling 40 minutes;
(2) slurry that ball milling obtains is vacuumized, take out and within 4 minutes, add dibenzoyl peroxide in backward slurry and continue to stir, then slurry to be injected into after in laminated glass mould in vacuum drying oven under 80 ° of C dry 2 hours;
(3) by the wet base demoulding at room temperature seasoning in step (2) 2 days, then at 100 ° of C temperature, humidity under the condition of 60% dry 2 days, is distributed into plasma spraying powder conveyer in billet surface spraying evenly by remaining one-tenth;
(4) by the base substrate of step (3) at room temperature with the ramp to 200 of 3 ° of C/min ° C, again with the ramp to 600 of 2 ° of C/min ° C, constant temperature is positioned in vacuum sintering furnace after keeping 2 hours, sinters 3 hours, can obtain at the temperature of 1600 ° of C.
In the present embodiment, the performance index result of pottery is as follows:
Ultimate compression strength (MPa): >=780;
Fracture toughness property (Mpa/m
1/2):>=5.8;
Flexural strength (MPa): >=480;
Thermal expansivity (10
-6/ K):>=5.4;
Impelling strength (KJm2): >=4.7.
Claims (2)
1. a sapphire whisker strengthens calcium oxide ceramics based composites and preparation method thereof, it is characterized in that, be made up of the raw material of following weight part: potassium felspar sand 8-10, crystalline flake graphite 3-5, calcium oxide 60-70, modified oxidized aluminum fiber 10-15, dibenzoyl peroxide 0.2-0.4, propionate 3-5, Sodium Persulfate 0.01-0.02, tripoly phosphate sodium STPP 1-2, epoxy resin 2-3, ethanol 20-25, deionized water 30-50;
The preparation method of described modified oxidized aluminum fiber is: sapphire whisker is soaked 1-2 hour in acetone, uses distilled water flushing 2-3 time, dry for standby after taking out, the ethanol mixing of the tetrabutyl titanate of 10-15 weight part and 150-180 weight part is added in the flask with magnetic stirring apparatus, by the deionized water of 2-3 weight part, the hydrochloric acid of 0.2-0.4 weight part and the ethanol of 2-5 weight part fully mix, slowly be added drop-wise in flask, add the molybdenum oxide powder of 2-4 weight part again, stir 30-40 minute, sapphire whisker for subsequent use is added in gel under vacuum tightness is 0.09-0.1MPa, floods 1-2 hour, dry under 70-80 ° of C after taking-up, repeatable operation like this 2-3 time, last under the protection of high-purity argon gas under 500-600 ° of C pyroreaction 1-2 hour.
2. according to claims 1, a kind of sapphire whisker strengthens calcium oxide ceramics based composites and preparation method thereof, it is characterized in that, is made up of following concrete steps:
(1) calcium oxide and potassium felspar sand are added in ball mill, ask as ball-milling medium using aluminum oxide, material ball ratio is 1:2, again propionate, Sodium Persulfate are added in the mixing solutions of ethanol and deionized water, adding after dissolving after tripoly phosphate sodium STPP, epoxy resin and modified oxidized aluminum fiber stir is added in ball mill, ball milling 20-40 minute;
(2) slurry that ball milling obtains is vacuumized, take out and within 2-5 minute, add dibenzoyl peroxide in backward slurry and continue to stir, then slurry to be injected into after in laminated glass mould in vacuum drying oven dry 1-2 hour under 60-80 ° of C;
(3) by the wet base demoulding at room temperature seasoning 1-2 days in step (2), then at 95-100 ° of C temperature, humidity is dry 1-2 days under the condition of 60-70%, remaining one-tenth is distributed into plasma spraying powder conveyer in billet surface spraying evenly;
(4) by the base substrate of step (3) at room temperature with the ramp to 200 of 3-5 ° of C/min ° C, again with the ramp to 600 of 1-2 ° of C/min ° C, constant temperature keeps being positioned in vacuum sintering furnace after 1-2 hour, sinters 3-4 hour, can obtain at the temperature of 1400-1600 ° of C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105614A (en) * | 2021-12-03 | 2022-03-01 | 上海交通大学 | Material for preparing fiber composite hydration-resistant calcium oxide crucible, crucible and preparation method |
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| CN101462867A (en) * | 2009-01-16 | 2009-06-24 | 中南大学 | Method for preparing BeO ceramic by gel injection moulding forming technique |
| CN101648822A (en) * | 2009-08-25 | 2010-02-17 | 山东理工大学 | Preparing method of denitration nanometer calcium oxide honeycomb ceramics |
| CN102659431A (en) * | 2012-05-11 | 2012-09-12 | 贵阳明通炉料有限公司 | Lime stone high-temperature ceramic matrix composite |
| CN102924062A (en) * | 2012-10-25 | 2013-02-13 | 北京航空航天大学 | Preparation method of calcium-oxide-based ceramic core |
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- 2015-05-19 CN CN201510252282.9A patent/CN104909786A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462867A (en) * | 2009-01-16 | 2009-06-24 | 中南大学 | Method for preparing BeO ceramic by gel injection moulding forming technique |
| CN101648822A (en) * | 2009-08-25 | 2010-02-17 | 山东理工大学 | Preparing method of denitration nanometer calcium oxide honeycomb ceramics |
| CN102659431A (en) * | 2012-05-11 | 2012-09-12 | 贵阳明通炉料有限公司 | Lime stone high-temperature ceramic matrix composite |
| CN102924062A (en) * | 2012-10-25 | 2013-02-13 | 北京航空航天大学 | Preparation method of calcium-oxide-based ceramic core |
Non-Patent Citations (1)
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| 鲍崇高: "《先进抗磨材料》", 31 October 2010, 西安交通大学出版社 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114105614A (en) * | 2021-12-03 | 2022-03-01 | 上海交通大学 | Material for preparing fiber composite hydration-resistant calcium oxide crucible, crucible and preparation method |
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Application publication date: 20150916 |