CN106747546A - A kind of high-strength and high ductility ceramic composite and its application - Google Patents
A kind of high-strength and high ductility ceramic composite and its application Download PDFInfo
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Abstract
The invention discloses a kind of high-strength and high ductility ceramic composite and its application, it is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber, the weight ratio of auxiliary agent are 100:(35‑45):(5‑15)；The ceramic matrix is made up of according to weight portion 30 50 parts of silicon nitrides and 25 35 parts of carborundum；The fiber is modified composite fiber, by basalt fibre and brucite fiber by weight (2 4):1 mixing post-modification is obtained, and method of modifying is：First the triethylamine solution ultrasound that composite fibre mass fraction is 10 20% is soaked 24 hours, clear water is rinsed to neutrality, drying, calcined 12 hours then at 450 550 DEG C, di-iso-octyldiphenylamine, 4 6% kojic acid and the 2 4% ethylenediamine tetra-acetic acid disalt of composite fibre weight 7 9% are added after cooling, ground and mixed is uniform after 50 70 DEG C of drying, crosses 200 300 mesh sieves；The auxiliary agent includes 35 parts of 20 30 parts of nano zircite, 5 15 parts of nano aluminium oxide, 48 parts of nano montmorillonite powder and nanometer Fluorspar Powder by weight.Not only intensity and hardness are high for the ceramic composite that the present invention is provided, and tenacity excellent.
Description
Technical field
The present invention relates to composite, and in particular to a kind of high-strength and high ductility ceramic composite and its application.
Background technology
Composite generally has the good combination property that different materials are mutually learnt from other's strong points to offset one's weaknesses.Composite have concurrently two kinds or
The characteristics of two or more materials, the performance of homogenous material can be improved, such as improve intensity, increase toughness and improve dielectric properties.
As the ceramic composite of high-temperature structural material, it is mainly used in the departments such as aerospace, military project.Additionally, in machinery, chemical industry, electricity
The fields such as sub- technology also widely used various ceramic composites.
It with ceramics is a class composite of matrix and various fiber composites that ceramic composite is.Ceramic matrix can be nitrogen
The high-temperature structural ceramics such as SiClx, carborundum.These advanced ceramics have high temperature resistant, high intensity and rigidity, relative weight lighter, anti-
The excellent properties such as corrosion, and its fatal weakness is to enbrittle, and during in stress state, can be cracked, or even fracture is led
Cause material failure.And use high intensity, elastomeric fiber and matrix compound, then it is improve ceramics toughness and reliability one
Effective method.Fiber can prevent the extension of crackle, so as to obtain the FRCMC of excellent in toughness.
The content of the invention
It is an object of the invention to provide a kind of high-strength and high ductility ceramic composite and its application.
Above-mentioned purpose of the invention is achieved by following technical scheme：
A kind of high-strength and high ductility ceramic composite, is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber,
The weight ratio of auxiliary agent is 100:(35-45):(5-15)；The ceramic matrix is according to weight portion by 30-50 parts of silicon nitride and 25-35
Part carborundum composition；The fiber is modified composite fiber, by basalt fibre and brucite fiber by weight (2-4):1 mixes
Close post-modification to be obtained, method of modifying is：The triethylamine solution ultrasound that composite fibre mass fraction is 10-20% is first soaked into 2-
4 hours, clear water was rinsed to neutrality, and drying is calcined 1-2 hours then at 450-550 DEG C, and composite fibre weight 7- is added after cooling
The ethylenediamine tetra-acetic acid disalt of 9% di-iso-octyldiphenylamine, the kojic acid of 4-6% and 2-4%, ground and mixed is uniformly after 50-
70 DEG C of drying, cross 200-300 mesh sieves；The auxiliary agent includes nano zircite 20-30 parts, nano aluminium oxide 5-15 by weight
Part, nano montmorillonite powder 4-8 parts and 3-5 parts of nanometer Fluorspar Powder.
Further, the ethylenediamine tetra-acetic acid disalt is disodium ethylene diamine tetraacetate or EDTAP dipotassium ethylene diamine tetraacetate.
Further, the ceramic matrix, fiber, the weight ratio of auxiliary agent are 10:4:1.
Further, the ceramic matrix is made up of according to weight portion 40 parts of silicon nitrides and 30 parts of carborundum.
Further, the fiber is modified composite fiber, by basalt fibre and brucite fiber by weight 3:1 mixes
Close post-modification to be obtained, method of modifying is：The triethylamine solution ultrasound that composite fibre mass fraction is 15% is first soaked 3 small
When, clear water is rinsed to neutrality, and drying is calcined 1.5 hours then at 500 DEG C, and the two of addition composite fibre weight 8% is different pungent after cooling
Base diphenylamines, 5% kojic acid and 3% ethylenediamine tetra-acetic acid disalt, ground and mixed uniformly after 60 DEG C of drying, cross 200-300
Mesh sieve.
Further, the auxiliary agent includes 25 parts of nano zircite, 10 parts of nano aluminium oxide, nano montmorillonite by weight
4 parts of 6 parts of powder and nanometer Fluorspar Powder.
The preparation method of above-mentioned high-strength and high ductility ceramic composite, including step：Step A, ceramic matrix is mixed with auxiliary agent
Close, be milled to and be uniformly dispersed, cross 200-300 mesh sieves；Step B, to step A gained powder in add equivalent to its weight 25-
35% deionized water and 4-8% ethylene glycol, is mixed into pureed；Step C, it is modified compound to being added in step B gained purees
Fiber, be milled to be uniformly dispersed after 300-400 DEG C calcine 2-4 hours, 200-300 mesh sieves were crushed after cooling；Step D, to
Add the deionized water and 20-30% glycerine of 1.5-2.5 times of its weight in step C gained powders, be milled to be uniformly dispersed after
100-120 DEG C of drying, crosses 40-60 mesh sieves, obtains final product within hot pressing 40-60 minutes at 1600-1700 DEG C, wherein, hot pressing pressure is 26-
30MPa。
Advantages of the present invention：
Not only intensity and hardness are high for the ceramic composite that the present invention is provided, and tenacity excellent, under stress state not
Crackle is also easy to produce, compared with prior art with prominent substantive distinguishing features and significant progress.
Specific embodiment
Essentiality content of the invention is further illustrated with reference to embodiment.
Embodiment 1：The preparation of ceramic composite
It is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber, the weight ratio of auxiliary agent are 100:40:10；Institute
Ceramic matrix is stated to be made up of 40 parts of silicon nitrides and 30 parts of carborundum according to weight portion；The fiber is modified composite fiber, by profound
Military rock fiber and brucite fiber are by weight 3:1 mixing post-modification is obtained, and method of modifying is：First by composite fibre quality point
Number is soaked 3 hours for 15% triethylamine solution ultrasound, and clear water is rinsed to neutrality, and drying is calcined 1.5 hours then at 500 DEG C, cold
But di-iso-octyldiphenylamine, 5% kojic acid and the 3% ethylenediamine tetra-acetic acid disalt of composite fibre weight 8%, grinding are added afterwards
It is well mixed to be dried after 60 DEG C, cross 200-300 mesh sieves；The auxiliary agent includes 25 parts of nano zircite, nano oxygen by weight
Change 4 parts of 10 parts of aluminium, 6 parts of nano montmorillonite powder and nanometer Fluorspar Powder.
Wherein, ethylenediamine tetra-acetic acid disalt is disodium ethylene diamine tetraacetate, it is also possible to EDTAP dipotassium ethylene diamine tetraacetate.
Preparation method：
Step A, ceramic matrix is mixed with auxiliary agent, is milled to and is uniformly dispersed, and crosses 200-300 mesh sieves；Step B, to step A
The deionized water and 6% ethylene glycol equivalent to its weight 30% are added in gained powder, pureed is mixed into；Step C, to step B
Add modified composite fiber in gained purees, be milled to be uniformly dispersed after 350 DEG C calcine 3 hours, crushed after cooling
200-300 mesh sieves；Step D, to the deionized water and 25% glycerine of 2 times of its weight is added in step C gained powders, is milled to point
Dissipate uniformly after 110 DEG C of drying, cross 40-60 mesh sieves, hot pressing is obtained final product for 50 minutes at 1650 DEG C, and hot pressing pressure is 28MPa.
Embodiment 2：The preparation of ceramic composite
It is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber, the weight ratio of auxiliary agent are 100:35:15；Institute
Ceramic matrix is stated to be made up of 30 parts of silicon nitrides and 25 parts of carborundum according to weight portion；The fiber is modified composite fiber, by profound
Military rock fiber and brucite fiber are by weight 2:1 mixing post-modification is obtained, and method of modifying is：First by composite fibre quality point
Number is soaked 4 hours for 10% triethylamine solution ultrasound, and clear water is rinsed to neutrality, and drying is calcined 2 hours then at 450 DEG C, cooling
Di-iso-octyldiphenylamine, 4% kojic acid and the 2% ethylenediamine tetra-acetic acid disalt of composite fibre weight 7% are added afterwards, and grinding is mixed
Close uniform after 50 DEG C of drying, cross 200-300 mesh sieves；The auxiliary agent includes 20 parts of nano zircite, nano oxidized by weight
3 parts of 5 parts of aluminium, 4 parts of nano montmorillonite powder and nanometer Fluorspar Powder.Wherein, ethylenediamine tetra-acetic acid disalt is disodium ethylene diamine tetraacetate,
Also EDTAP dipotassium ethylene diamine tetraacetate can be used.
Preparation method：
Step A, ceramic matrix is mixed with auxiliary agent, is milled to and is uniformly dispersed, and crosses 200-300 mesh sieves；Step B, to step A
The deionized water and 6% ethylene glycol equivalent to its weight 30% are added in gained powder, pureed is mixed into；Step C, to step B
Add modified composite fiber in gained purees, be milled to be uniformly dispersed after 350 DEG C calcine 3 hours, crushed after cooling
200-300 mesh sieves；Step D, to the deionized water and 25% glycerine of 2 times of its weight is added in step C gained powders, is milled to point
Dissipate uniformly after 110 DEG C of drying, cross 40-60 mesh sieves, hot pressing is obtained final product for 50 minutes at 1650 DEG C, and hot pressing pressure is 28MPa.
Embodiment 3：The preparation of ceramic composite
It is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber, the weight ratio of auxiliary agent are 100:45:5；Institute
Ceramic matrix is stated to be made up of 50 parts of silicon nitrides and 35 parts of carborundum according to weight portion；The fiber is modified composite fiber, by profound
Military rock fiber and brucite fiber are by weight 4:1 mixing post-modification is obtained, and method of modifying is：First by composite fibre quality point
Number is soaked 2 hours for 20% triethylamine solution ultrasound, and clear water is rinsed to neutrality, and drying is calcined 1 hour then at 550 DEG C, cooling
Di-iso-octyldiphenylamine, 6% kojic acid and the 4% ethylenediamine tetra-acetic acid disalt of composite fibre weight 9% are added afterwards, and grinding is mixed
Close uniform after 70 DEG C of drying, cross 200-300 mesh sieves；The auxiliary agent includes 30 parts of nano zircite, nano oxidized by weight
5 parts of 15 parts of aluminium, 8 parts of nano montmorillonite powder and nanometer Fluorspar Powder.Wherein, ethylenediamine tetra-acetic acid disalt is ethylenediamine tetra-acetic acid two
Sodium, it is also possible to EDTAP dipotassium ethylene diamine tetraacetate.
Preparation method：
Step A, ceramic matrix is mixed with auxiliary agent, is milled to and is uniformly dispersed, and crosses 200-300 mesh sieves；Step B, to step A
The deionized water and 6% ethylene glycol equivalent to its weight 30% are added in gained powder, pureed is mixed into；Step C, to step B
Add modified composite fiber in gained purees, be milled to be uniformly dispersed after 350 DEG C calcine 3 hours, crushed after cooling
200-300 mesh sieves；Step D, to the deionized water and 25% glycerine of 2 times of its weight is added in step C gained powders, is milled to point
Dissipate uniformly after 110 DEG C of drying, cross 40-60 mesh sieves, hot pressing is obtained final product for 50 minutes at 1650 DEG C, and hot pressing pressure is 28MPa.
Embodiment 4：The preparation of ceramic composite
It is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber, the weight ratio of auxiliary agent are 100:35:10；Institute
Ceramic matrix is stated to be made up of 40 parts of silicon nitrides and 30 parts of carborundum according to weight portion；The fiber is modified composite fiber, by profound
Military rock fiber and brucite fiber are by weight 3:1 mixing post-modification is obtained, and method of modifying is：First by composite fibre quality point
Number is soaked 3 hours for 15% triethylamine solution ultrasound, and clear water is rinsed to neutrality, and drying is calcined 1.5 hours then at 500 DEG C, cold
But di-iso-octyldiphenylamine, 5% kojic acid and the 3% ethylenediamine tetra-acetic acid disalt of composite fibre weight 8%, grinding are added afterwards
It is well mixed to be dried after 60 DEG C, cross 200-300 mesh sieves；The auxiliary agent includes 25 parts of nano zircite, nano oxygen by weight
Change 4 parts of 10 parts of aluminium, 6 parts of nano montmorillonite powder and nanometer Fluorspar Powder.
Wherein, ethylenediamine tetra-acetic acid disalt is disodium ethylene diamine tetraacetate, it is also possible to EDTAP dipotassium ethylene diamine tetraacetate.
Preparation method：
Step A, ceramic matrix is mixed with auxiliary agent, is milled to and is uniformly dispersed, and crosses 200-300 mesh sieves；Step B, to step A
The deionized water and 6% ethylene glycol equivalent to its weight 30% are added in gained powder, pureed is mixed into；Step C, to step B
Add modified composite fiber in gained purees, be milled to be uniformly dispersed after 350 DEG C calcine 3 hours, crushed after cooling
200-300 mesh sieves；Step D, to the deionized water and 25% glycerine of 2 times of its weight is added in step C gained powders, is milled to point
Dissipate uniformly after 110 DEG C of drying, cross 40-60 mesh sieves, hot pressing is obtained final product for 50 minutes at 1650 DEG C, and hot pressing pressure is 28MPa.
Embodiment 5：The preparation of ceramic composite
It is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber, the weight ratio of auxiliary agent are 100:45:10；Institute
Ceramic matrix is stated to be made up of 40 parts of silicon nitrides and 30 parts of carborundum according to weight portion；The fiber is modified composite fiber, by profound
Military rock fiber and brucite fiber are by weight 3:1 mixing post-modification is obtained, and method of modifying is：First by composite fibre quality point
Number is soaked 3 hours for 15% triethylamine solution ultrasound, and clear water is rinsed to neutrality, and drying is calcined 1.5 hours then at 500 DEG C, cold
But di-iso-octyldiphenylamine, 5% kojic acid and the 3% ethylenediamine tetra-acetic acid disalt of composite fibre weight 8%, grinding are added afterwards
It is well mixed to be dried after 60 DEG C, cross 200-300 mesh sieves；The auxiliary agent includes 25 parts of nano zircite, nano oxygen by weight
Change 4 parts of 10 parts of aluminium, 6 parts of nano montmorillonite powder and nanometer Fluorspar Powder.
Wherein, ethylenediamine tetra-acetic acid disalt is disodium ethylene diamine tetraacetate, it is also possible to EDTAP dipotassium ethylene diamine tetraacetate.
Preparation method：
Step A, ceramic matrix is mixed with auxiliary agent, is milled to and is uniformly dispersed, and crosses 200-300 mesh sieves；Step B, to step A
The deionized water and 6% ethylene glycol equivalent to its weight 30% are added in gained powder, pureed is mixed into；Step C, to step B
Add modified composite fiber in gained purees, be milled to be uniformly dispersed after 350 DEG C calcine 3 hours, crushed after cooling
200-300 mesh sieves；Step D, to the deionized water and 25% glycerine of 2 times of its weight is added in step C gained powders, is milled to point
Dissipate uniformly after 110 DEG C of drying, cross 40-60 mesh sieves, hot pressing is obtained final product for 50 minutes at 1650 DEG C, and hot pressing pressure is 28MPa.
Embodiment 6：The contrast of embodiment 1, fiber is unmodified composite fibre
It is composited by ceramic matrix, fiber, auxiliary agent, ceramic matrix, fiber, the weight ratio of auxiliary agent are 100:40:10；Institute
Ceramic matrix is stated to be made up of 40 parts of silicon nitrides and 30 parts of carborundum according to weight portion；The fiber is composite fibre, by basalt
Fiber and brucite fiber are by weight 3:1 is mixed to prepare；The auxiliary agent includes 25 parts of nano zircite, nano oxygen by weight
Change 4 parts of 10 parts of aluminium, 6 parts of nano montmorillonite powder and nanometer Fluorspar Powder.
Wherein, ethylenediamine tetra-acetic acid disalt is disodium ethylene diamine tetraacetate, it is also possible to EDTAP dipotassium ethylene diamine tetraacetate.
Preparation method：
Step A, ceramic matrix is mixed with auxiliary agent, is milled to and is uniformly dispersed, and crosses 200-300 mesh sieves；Step B, to step A
The deionized water and 6% ethylene glycol equivalent to its weight 30% are added in gained powder, pureed is mixed into；Step C, to step B
Add composite fibre in gained purees, be milled to be uniformly dispersed after 350 DEG C calcine 3 hours, 200-300 was crushed after cooling
Mesh sieve；Step D, to deionized water and 25% glycerine that 2 times of its weight is added in step C gained powders, is milled to and is uniformly dispersed
After 110 DEG C of drying, 40-60 mesh sieves are crossed, hot pressing is obtained final product for 50 minutes at 1650 DEG C, and hot pressing pressure is 28MPa.
Embodiment 7：Effect example
The Vickers hardness of ceramic composite, bending strength and fracture toughness obtained by difference testing example 1-6, as a result such as
Following table：
| Vickers hardness (GPa) | Bending strength (MPa) | Fracture toughness (MPam1/2) | |
| Embodiment 1 | 98 | 1210 | 21 |
| Embodiment 2 | 95 | 1180 | 19 |
| Embodiment 3 | 96 | 1190 | 20 |
| Embodiment 4 | 95 | 1185 | 19 |
| Embodiment 5 | 94 | 1175 | 20 |
| Embodiment 6 | 90 | 1090 | 8 |
| Certain commercially available ceramics | 85 | 1020 | 6 |
Result shows that not only intensity and hardness are high for the ceramic composite that the present invention is provided, and tenacity excellent, in stress
Crackle is not likely to produce under state, compared with prior art with prominent substantive distinguishing features and significant progress.
Claims (7)
1. a kind of high-strength and high ductility ceramic composite, is composited by ceramic matrix, fiber, auxiliary agent, it is characterised in that：Ceramic base
Body, fiber, the weight ratio of auxiliary agent are 100:(35-45):(5-15)；The ceramic matrix is according to weight portion by 30-50 parts of nitridation
Silicon and 25-35 parts of carborundum composition；The fiber is modified composite fiber, by basalt fibre and brucite fiber by weight
(2-4):1 mixing post-modification is obtained, and method of modifying is：First by triethylamine solution that composite fibre mass fraction is 10-20%
Ultrasound immersion 2-4 hours, clear water is rinsed to neutrality, and drying is calcined 1-2 hours then at 450-550 DEG C, and compound fibre is added after cooling
The ethylenediamine tetra-acetic acid disalt of the di-iso-octyldiphenylamine, the kojic acid of 4-6% and 2-4% of dimension weight 7-9%, ground and mixed is uniform
After 50-70 DEG C of drying, 200-300 mesh sieves are crossed；The auxiliary agent by weight include nano zircite 20-30 parts, it is nano oxidized
Aluminium 5-15 parts, nano montmorillonite powder 4-8 parts and 3-5 parts of nanometer Fluorspar Powder.
2. high-strength and high ductility ceramic composite according to claim 1, it is characterised in that：The ethylenediamine tetra-acetic acid disalt
It is disodium ethylene diamine tetraacetate or EDTAP dipotassium ethylene diamine tetraacetate.
3. high-strength and high ductility ceramic composite according to claim 1, it is characterised in that：The ceramic matrix, fiber, help
The weight ratio of agent is 10:4:1.
4. high-strength and high ductility ceramic composite according to claim 1, it is characterised in that：The ceramic matrix is according to weight
Part is made up of 40 parts of silicon nitrides and 30 parts of carborundum.
5. high-strength and high ductility ceramic composite according to claim 1, it is characterised in that the fiber is modified compound fibre
Dimension, by basalt fibre and brucite fiber by weight 3:1 mixing post-modification is obtained, and method of modifying is：First by composite fibre
With the triethylamine solution ultrasound immersion that mass fraction is 15% 3 hours, clear water was rinsed to neutrality, is dried, then at 500 DEG C of calcinings
1.5 hours, di-iso-octyldiphenylamine, 5% kojic acid and the 3% ethylenediamine tetrem of composite fibre weight 8% are added after cooling
Sour disalt, ground and mixed is crossed 200-300 mesh sieves and is obtained final product uniformly after 60 DEG C of drying.
6. high-strength and high ductility ceramic composite according to claim 1, it is characterised in that：The auxiliary agent includes by weight
4 parts of 25 parts of nano zircite, 10 parts of nano aluminium oxide, 6 parts of nano montmorillonite powder and nanometer Fluorspar Powder.
7. the preparation method of any high-strength and high ductility ceramic composites of claim 1-6, it is characterised in that including step：
Step A, ceramic matrix is mixed with auxiliary agent, is milled to and is uniformly dispersed, and crosses 200-300 mesh sieves；Step B, to step A gained powders
Middle deionized water and 4-8% ethylene glycol of the addition equivalent to its weight 25-35%, is mixed into pureed；Step C, to step B gained
Modified composite fiber is added in purees, be milled to be uniformly dispersed after 300-400 DEG C calcine 2-4 hours, crushed after cooling
200-300 mesh sieves；Step D, to step C gained powder in add the deionized water and 20-30% of 1.5-2.5 times of its weight sweet
Oil, is milled to and is uniformly dispersed after 100-120 DEG C of drying, crosses 40-60 mesh sieves, is within hot pressing 40-60 minutes at 1600-1700 DEG C
, wherein, hot pressing pressure is 26-30MPa.
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