CN104072156B - A kind of Nano-compound Ceramic Core - Google Patents
A kind of Nano-compound Ceramic Core Download PDFInfo
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- CN104072156B CN104072156B CN201410224822.8A CN201410224822A CN104072156B CN 104072156 B CN104072156 B CN 104072156B CN 201410224822 A CN201410224822 A CN 201410224822A CN 104072156 B CN104072156 B CN 104072156B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 32
- 239000002114 nanocomposite Substances 0.000 claims abstract description 27
- 239000008187 granular material Substances 0.000 claims abstract description 24
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 24
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 24
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004902 Softening Agent Substances 0.000 claims abstract description 13
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 8
- 239000004200 microcrystalline wax Substances 0.000 claims abstract description 7
- 235000019808 microcrystalline wax Nutrition 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 28
- 238000002360 preparation method Methods 0.000 claims description 19
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- 150000003746 yttrium Chemical class 0.000 claims description 9
- 150000003754 zirconium Chemical class 0.000 claims description 9
- 239000002243 precursor Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052582 BN Inorganic materials 0.000 claims description 6
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 241000241413 Propolis Species 0.000 claims description 6
- XFBXDGLHUSUNMG-UHFFFAOYSA-N alumane;hydrate Chemical compound O.[AlH3] XFBXDGLHUSUNMG-UHFFFAOYSA-N 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 229940069949 propolis Drugs 0.000 claims description 6
- 229960001866 silicon dioxide Drugs 0.000 claims description 6
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- SHYSNLBEJADGAC-UHFFFAOYSA-N decanedioic acid;propane-1,1-diol Chemical compound CCC(O)O.OC(=O)CCCCCCCCC(O)=O SHYSNLBEJADGAC-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- PCMOZDDGXKIOLL-UHFFFAOYSA-K yttrium chloride Chemical compound [Cl-].[Cl-].[Cl-].[Y+3] PCMOZDDGXKIOLL-UHFFFAOYSA-K 0.000 claims description 3
- BXJPTTGFESFXJU-UHFFFAOYSA-N yttrium(3+);trinitrate Chemical compound [Y+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O BXJPTTGFESFXJU-UHFFFAOYSA-N 0.000 claims description 3
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 3
- 238000010304 firing Methods 0.000 abstract description 3
- 239000007858 starting material Substances 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 35
- 229910001069 Ti alloy Inorganic materials 0.000 description 11
- 238000005266 casting Methods 0.000 description 6
- 238000005495 investment casting Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- BNUDRLITYNMTPD-UHFFFAOYSA-N acetic acid;zirconium Chemical compound [Zr].CC(O)=O BNUDRLITYNMTPD-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Ceramic Products (AREA)
Abstract
The invention discloses a kind of Nano-compound Ceramic Core, it is characterized in that what it was made up of the raw material of following weight per-cent: mineralizer 12-18wt%, softening agent 14-20wt%, nano silicon 2-3wt%, nano magnesia 1-2wt%, Microcrystalline Wax 2-3wt%, surplus is rare earth clad nano composite granule, ceramic core of the present invention has enough bending strengths, percent of firing shrinkage is little, the not variability of size and dimension can be ensured, because what adopt is the starting material of different fineness, effectively can improve the porosity of core, thus can be good at improving depoling performance.
Description
Technical field
The present invention relates generally to precision casting field, particularly relates to a kind of Nano-compound Ceramic Core.
Background technology
The complicated inner cavity of alloy-steel casting is shaping mainly through using prefabricated ceramic core, and manages to remove after foundry goods is cast.Its technical process is as follows: prepared by Tao Xin, prepare containing the wax-pattern of Tao Xin, the dewaxing of shell processed, shell and roasting, alloy casting, depoling.As everyone knows, along with China's development large aircraft project and the startup of various new work engine research and development program element, the body of titanium alloy precision casting, structure and performance thereof are had higher requirement.
At present, research magnesium oxide, silicon oxide base ceramic core comparatively widely, because core material does not possess the good chemical reaction inertia of molten titanium alloy and core leach technics complexity is difficult to be applied to titanium alloy fine casting field.With molten titanium alloy, at high temperature there is higher chemical reaction inertia due to nano combined, and the high-temperature creep resistance that tool is good, nano combined is a kind of aggregate being well suited for being used as titanium alloy fine casting ceramic core.Cause the concern of related scientific research personnel in recent years, Chinese invention patent application as publication number 200610028168.9 discloses a kind of preparation method of the nano composite ceramic shell for titanium or titanium alloy precision casting, adopts nano composite powder and acetic acid zirconium or silicon sol thereof to be that painting slip made by binding agent in this invention.Because the shape of titanium alloy becomes increasingly complex, present titanium alloy casting is often with complicated inner cavity, and this requires core in titanium alloy casting process, possess good high-temperature creep resistance and then ensures that the integrity of shape is also had higher requirement to the performance that removes of core simultaneously.But nano combined stable chemical performance to core remove bring certain difficulty especially for complex-shaped core be difficult to mechanically remove.In order to improve the depoling performance of core, magnesium oxide core material also receives the concern of related scientific research personnel, Chinese invention patent application as CN102531648A discloses a kind of nano composite oxides magnesium matrix ceramic core and preparation method, due to comparatively complicated in titanium alloy precision casting technique, be prepared into the duration of pouring of alloy generally all more than two weeks from the wax-pattern containing Tao Xin, core in use will contact with water-based paint.Namely hydration reaction occur after the core that above-mentioned patent is prepared meets water and cause the defeated and dispersed of core, therefore, above-mentioned core is difficult to be applied to titanium alloy precision casting field.
Summary of the invention
The object of the invention is just to provide a kind of Nano-compound Ceramic Core.
The present invention is achieved by the following technical solutions:
A kind of Nano-compound Ceramic Core, is characterized in that what it was made up of the raw material of following weight per-cent:
Mineralizer 12-18wt%, softening agent 14-20wt%, nano silicon 2-3wt%, nano magnesia 1-2wt%, Microcrystalline Wax 2-3wt%, surplus are rare earth clad nano composite granule;
Described mineralizer be one in zirconium dioxide, calcium oxide, silicon-dioxide or two kinds and more than, with any mass ratio mixing composition;
Described softening agent is made up of the raw material of following weight parts:
Paraffin 82-90, propolis 3-4, alumino silica gel 6-8, sebacic acid propanediol polyester 1-2, aluminium hydrate powder 2-3, Silane coupling agent KH550 0.1-0.2;
Above-mentioned heating paraffin is melted, adds propolis, aluminium hydrate powder, Silane coupling agent KH550,300-400 rev/min of dispersed with stirring 10-12 minute, add each raw material of residue, stir, at 80-90 DEG C, insulation leaves standstill 3-5 minute, cooling discharging, obtains described softening agent;
The preparation method of described rare earth clad nano composite granule comprises the following steps:
(1) by nano aluminium oxide, nano silicon mixing, join in 100-200 times of deionized water, ultrasonic disperse, obtains dispersion liquid;
(2) boron nitride powder is mixed with calcium chloride, add Silane coupling agent KH550,1600-2000 rev/min of dispersed with stirring 10-15 minute, ball milling, dry, obtain particle diameter 60-150 μm, obtain basic powder;
(3) join in upper dispersion liquid by basic powder, dispersed with stirring, obtains premixed liquid;
(4) by inorganic zirconium salts and inorganic yttrium salts using any ratio mixing as rare earth oxide presoma, take inorganic zirconium salts and inorganic yttrium salts and put into the container filling deionized water and stirs and heat and obtain precursor solution;
(5) add in precursor solution by above-mentioned premixed liquid, the pH value of regulator solution, to 8-10, obtains mixed solution;
(6) dried by above-mentioned mixed solution, obtain drying powder, oven dry powder is carried out sintering and obtain rare earth clad nano composite granule, sintering temperature is 1200-1500 DEG C, and the time is 0.5-20h.
2, a kind of Nano-compound Ceramic Core according to claim 1, is characterized in that, in the preparation of described rare earth clad nano composite granule, the mixing quality of described rare earth oxide presoma and the mass ratio of basic powder are 1:24-30.
3, a kind of Nano-compound Ceramic Core according to claim 1, is characterized in that, in the preparation of described rare earth clad nano composite granule, described inorganic zirconium salts is zirconium chloride or zirconium nitrate, and described inorganic yttrium salts is Yttrium trichloride or Yttrium trinitrate.
4, a kind of Nano-compound Ceramic Core according to claim 1, is characterized in that, in the preparation of described rare earth clad nano composite granule, described rare earth oxide precursor solution, its concentration is 0.01-0.4mol/L.
5, a kind of Nano-compound Ceramic Core according to claim 1, it is characterized in that, in the preparation of described rare earth clad nano composite granule, the mass ratio of described boron nitride powder and nano silicon, nano aluminium oxide, calcium chloride is 100:4-5:5-6:2-3.
6, a preparation method for Nano-compound Ceramic Core as claimed in claim 1, is characterized in that comprising the following steps:
(1) by above-mentioned nano silicon, nano magnesia, Microcrystalline Wax mixing, heated and stirred 10-15 minute at 50-60 DEG C, adds the 6-10% of above-mentioned rare earth clad nano composite granule weight, and ball milling is abundant, obtains Preblend;
(2) mixer is heated to 120-140 DEG C, add softening agent, then each raw material of residue is added under agitation, continue after adding to be uniformly mixed 10-12 hour, carry out moulding as requested, sinter and obtain described Nano-compound Ceramic Core, described sintering temperature is 1300-1600 DEG C, and the time is 0.5-20h.
Advantage of the present invention is:
Ceramic core of the present invention has enough bending strengths, percent of firing shrinkage is little, can ensure the not variability of size and dimension, because what adopt is the starting material of different fineness, effectively can improve the porosity of core, thus can be good at improving depoling performance.
Embodiment
Embodiment 1
A kind of Nano-compound Ceramic Core, it is made up of the raw material of following weight per-cent:
Mineralizer 18wt%, softening agent 20wt%, nano silicon 3wt%, nano magnesia 2wt%, Microcrystalline Wax 3wt%, surplus are rare earth clad nano composite granule;
Described mineralizer is the mass ratio mixing compositions such as zirconium dioxide, calcium oxide, silicon-dioxide;
Described softening agent is made up of the raw material of following weight parts:
Paraffin 82, propolis 4, alumino silica gel 8, sebacic acid propanediol polyester 2, aluminium hydrate powder 3, Silane coupling agent KH550 0.2;
Above-mentioned heating paraffin melted, add propolis, aluminium hydrate powder, Silane coupling agent KH550,400 revs/min of dispersed with stirring 12 minutes, add each raw material of residue, stir, at 90 DEG C, insulation leaves standstill 3-5 minute, and cooling discharging, obtains described softening agent;
The preparation method of described rare earth clad nano composite granule comprises the following steps:
(1) by nano aluminium oxide, nano silicon mixing, join in 200 times of deionized waters, ultrasonic disperse, obtains dispersion liquid;
(2) boron nitride powder is mixed with calcium chloride, add Silane coupling agent KH550,2000 revs/min of dispersed with stirring 15 minutes, ball milling, dry, obtain particle diameter 150 μm, obtain basic powder;
(3) join in upper dispersion liquid by basic powder, dispersed with stirring, obtains premixed liquid;
(4) by inorganic zirconium salts and inorganic yttrium salts using any ratio mixing as rare earth oxide presoma, take inorganic zirconium salts and inorganic yttrium salts and put into the container filling deionized water and stirs and heat and obtain precursor solution;
(5) above-mentioned premixed liquid is added in precursor solution, the pH value to 10 of regulator solution, obtain mixed solution;
(6) dried by above-mentioned mixed solution, obtain drying powder, oven dry powder is carried out sintering and obtain rare earth clad nano composite granule, sintering temperature is 1500 DEG C, and the time is 10h.
A kind of Nano-compound Ceramic Core, in the preparation of described rare earth clad nano composite granule, the mixing quality of described rare earth oxide presoma and the mass ratio of basic powder are 1:30.
A kind of Nano-compound Ceramic Core, in the preparation of described rare earth clad nano composite granule, described inorganic zirconium salts is zirconium chloride or zirconium nitrate, and described inorganic yttrium salts is Yttrium trichloride or Yttrium trinitrate.
A kind of Nano-compound Ceramic Core, in the preparation of described rare earth clad nano composite granule, described rare earth oxide precursor solution, its concentration is 0.4mol/L.
A kind of Nano-compound Ceramic Core, in the preparation of described rare earth clad nano composite granule, the mass ratio of described boron nitride powder and nano silicon, nano aluminium oxide, calcium chloride is 100:5:6:2.
A preparation method for Nano-compound Ceramic Core, comprises the following steps:
(1) by above-mentioned nano silicon, nano magnesia, Microcrystalline Wax mixing, heated and stirred 15 minutes at 60 DEG C, adds 10% of above-mentioned rare earth clad nano composite granule weight, and ball milling is abundant, obtains Preblend;
(2) mixer is heated to 140 DEG C, adds softening agent, then add each raw material of residue under agitation, continue after adding to be uniformly mixed 12 hours, carry out moulding as requested, sinter and obtain described Nano-compound Ceramic Core, described sintering temperature is 1300 DEG C, and the time is 7h.
Performance test:
Room temperature bending strength 59MPa, high temperature amount of deflection (being incubated 30min at 1550 DEG C) 0.43mm, percent of firing shrinkage 0.55%.
Claims (5)
1. a Nano-compound Ceramic Core, is characterized in that it is made up of the raw material of following weight per-cent: mineralizer 12-18wt%, softening agent 14-20wt%, nano silicon 2-3wt%, nano magnesia 1-2wt%, Microcrystalline Wax 2-3wt%, surplus are rare earth clad nano composite granule;
Described mineralizer is one in zirconium dioxide, calcium oxide, silicon-dioxide or two or more, with any mass ratio mixing composition;
Described softening agent is made up of the raw material of following weight parts: paraffin 82-90, propolis 3-4, alumino silica gel 6-8, sebacic acid propanediol polyester 1-2, aluminium hydrate powder 2-3, Silane coupling agent KH550 0.1-0.2; Above-mentioned heating paraffin is melted, adds propolis, aluminium hydrate powder, Silane coupling agent KH550,300-400 rev/min of dispersed with stirring 10-12 minute, add each raw material of residue, stir, at 80-90 DEG C, insulation leaves standstill 3-5 minute, cooling discharging, obtains described softening agent;
The preparation method of described rare earth clad nano composite granule comprises the following steps:
(1) by nano aluminium oxide, nano silicon mixing, join in 100-200 times of deionized water, ultrasonic disperse, obtains dispersion liquid;
(2) boron nitride powder is mixed with calcium chloride, add Silane coupling agent KH550,1600-2000 rev/min of dispersed with stirring 10-15 minute, ball milling, dry, obtain the basic powder of particle diameter 60-150 μm;
(3) join in upper dispersion liquid by basic powder, dispersed with stirring, obtains premixed liquid;
(4) by inorganic zirconium salts and inorganic yttrium salts using any ratio mixing as rare earth oxide presoma, take inorganic zirconium salts and inorganic yttrium salts and put into the container filling deionized water and stirs and heat and obtain rare earth oxide precursor solution;
(5) add in precursor solution by above-mentioned premixed liquid, the pH value of regulator solution, to 8-10, obtains mixed solution;
(6) dried by above-mentioned mixed solution, obtain drying powder, oven dry powder is carried out sintering and obtain rare earth clad nano composite granule, sintering temperature is 1200-1500 DEG C, and the time is 0.5-20h.
2. a kind of Nano-compound Ceramic Core according to claim 1, is characterized in that, in the preparation of described rare earth clad nano composite granule, the mixing quality of described rare earth oxide presoma and the mass ratio of basic powder are 1:24-30.
3. a kind of Nano-compound Ceramic Core according to claim 1, is characterized in that, in the preparation of described rare earth clad nano composite granule, described inorganic zirconium salts is zirconium chloride or zirconium nitrate, and described inorganic yttrium salts is Yttrium trichloride or Yttrium trinitrate.
4. a kind of Nano-compound Ceramic Core according to claim 1, it is characterized in that, in the preparation of described rare earth clad nano composite granule, the mass ratio of described boron nitride powder and nano silicon, nano aluminium oxide, calcium chloride is 100:4-5:5-6:2-3.
5. a preparation method for Nano-compound Ceramic Core as claimed in claim 1, is characterized in that comprising the following steps:
(1) by above-mentioned nano silicon, nano magnesia, Microcrystalline Wax mixing, heated and stirred 10-15 minute at 50-60 DEG C, adds the 6-10% of above-mentioned rare earth clad nano composite granule weight, and ball milling is abundant, obtains Preblend;
(2) mixer is heated to 120-140 DEG C, add softening agent, then each raw material of residue is added under agitation, continue after adding to be uniformly mixed 10-12 hour, carry out moulding as requested, sinter and obtain described Nano-compound Ceramic Core, described sintering temperature is 1300-1600 DEG C, and the time is 0.5-20h.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876272A (en) * | 2006-06-27 | 2006-12-13 | 上海大学 | Preparation method of boron nitride ceramic shell for titanium and titanium alloy precision casting |
| CN101537473A (en) * | 2008-03-20 | 2009-09-23 | 上海市机械制造工艺研究所有限公司 | Ceramic core for silica sol precision casting and manufacturing process thereof |
| EP2554294A2 (en) * | 2011-08-03 | 2013-02-06 | United Technologies Corporation | Hybrid core assembly |
| 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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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876272A (en) * | 2006-06-27 | 2006-12-13 | 上海大学 | Preparation method of boron nitride ceramic shell for titanium and titanium alloy precision casting |
| CN101537473A (en) * | 2008-03-20 | 2009-09-23 | 上海市机械制造工艺研究所有限公司 | Ceramic core for silica sol precision casting and manufacturing process thereof |
| EP2554294A2 (en) * | 2011-08-03 | 2013-02-06 | United Technologies Corporation | Hybrid core assembly |
| 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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