CN102924087A - Method for preparing cubic born nitride-silicon carbide composite ceramic material and product thereof - Google Patents
Method for preparing cubic born nitride-silicon carbide composite ceramic material and product thereof Download PDFInfo
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- CN102924087A CN102924087A CN201210488170XA CN201210488170A CN102924087A CN 102924087 A CN102924087 A CN 102924087A CN 201210488170X A CN201210488170X A CN 201210488170XA CN 201210488170 A CN201210488170 A CN 201210488170A CN 102924087 A CN102924087 A CN 102924087A
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Abstract
The invention relates to a method for preparing a cubic born nitride-silicon carbide composite ceramic material, comprising the following steps: wetly mixing 60-80% of cubic born nitride particles, 10-15% of binder, 10-15% of carbon powder and 0-10% of silicon power together by weight percent, thereby obtaining mixed powder; forming the mixed powder at 300 DEG C and under the pressure of 20-45 MPa, thereby obtaining a green body; performing thermal treatment on the green body to obtain a cubic born nitride composite ceramic green body; putting the green body in a graphite crucible, putting an appropriate quantity of powder or silicon blocks on the green body, and preserving heat at 1480-1550 DEG C for 1 h in a vacuum environment superior to 10-2 Pa, thereby obtaining a sintering body; and cooling the sintering body in the furnace, thereby obtaining compact cubic born nitride-silicon carbide composite ceramic material. The process is a low-cost high-efficiency preparation method capable of obtaining high-density, high-content cubic born nitride-silicon carbide composite ceramics; and the prepared composite ceramics can be used as but not limited to the ultra-hard material for various wearable engineering fields.
Description
Technical field
The invention belongs to powder metallurgical technology, relate to the preparation technology of superhard material, the preparation method of especially a kind of cubic boron nitride of high-content-silicon carbide ceramics diphase ceramic material.
Background technology
The wedding agent of cubic boron nitride can be selected resin, metal or pottery.The cubic boron nitride superhard material of employing ceramic bond has the common feature of ceramic bond and cubic boron nitride, compare with resin or melts combine CBN material, the ceramic binder cubic boron nitride superhard material is as the grinding tool material, its grinding capacity is strong, grinding temperature is low, the grinding tool durability is high, the shape-holding property of grinding tool is good during grinding, the parts size precision that processes is high, the whole self-sharpening of grinding tool is good, and the finishing interlude is long, during finishing also than being easier to, be difficult for during grinding stopping up, be difficult for the burn workpiece, and can cool off with various cooling fluids.
In order to reduce the sintering temperature of cubic boron nitride-ceramic superhard material, usually in ceramic bond, add various basic oxide (such as Na2O, K2O, Li2O etc.) as fusing assistant, these fusing assistants at high temperature can react with cubic boron nitride, cubic boron nitride causes certain erosion, thereby causing the sharp-featured cubic boron nitride monocrystal of complete crystallization to corrode attenuates, lose effective cutting power, and the gas that decomposition produces is in cubic boron nitride and at the interface enrichment of ceramic bond, generate bubble, thereby the bonding strength between both interfaces is reduced greatly, reduced the hold of wedding agent cubic boron nitride.Compare with other wedding agents, ceramic bond requires higher to selected cubic boron nitride monocrystal, and selected cubic boron nitride must have that crystalline form is complete, zero defect, good heat resistance, characteristics that intensity is high.This technological method has improved the preparation cost of cubic boron nitride-ceramic superhard material, has limited it and has made scope.
The present invention has overcome defects.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of comprise high density cubic boron nitride, density controlled, in conjunction with good cubic boron nitride-carborundum composite-phase ceramic material preparation technique.
Technical scheme of the present invention is achieved by following processing step:
(1) with mass percent is 100 parts of the mixed powders that form of 60 ~ 80% cubic boron nitride particle, 10 ~ 15% resol, 10 ~ 15% carbon dust, 0 ~ 10% silica flour, with 100 parts of industrial spirit, the wet mixing ball milling is 12 ~ 24 hours on high energy ball mill, powder behind the ball milling is after 80 ℃ of oven dry, cross 200 mesh sieves, extracting screen underflow is as mixed powder, and this mixed powder is obtained green compact at 300 ℃ and 20 ~ 45MPa Forming under Pressure;
(2) with green compact after 1 h is processed in 800 ~ 900 ℃ of lower insulations, obtain the cubic boron nitride ceramic blank;
(3) the cubic boron nitride ceramic blank is positioned in the plumbago crucible, places 0.1 ~ 0.3 times powder of blank weight or the silicon of block at blank, 1 * 10
-2~ 1 * 10
-3Under the vacuum environment of Pa, 1480 ~ 1550 ℃ of lower insulations 1 ~ 2 hour, obtain sintered blank;
(4) will namely make cubic boron nitride-carborundum composite-phase ceramic material behind the resulting sintered blank furnace cooling of step 3.
With respect to prior art, the present invention has the following advantages:
1. the processing method of preparation cubic boron nitride proposed by the invention-carborundum composite-phase ceramic material, avoided the necessary problem of under high-temperature and high-pressure conditions, carrying out sintering of common process, greatly reduce difficulty and the process costs of preparation, and can prepare goods complex-shaped and that volume is larger;
2. the cubic boron nitride of preparation technology's gained of the present invention's proposition-carborundum composite-phase ceramic material has high-compactness, thereby has improved the work-ing life of material;
3. the composition variation range that the cubic boron nitride of the present invention's preparation-the carborundum composite-phase ceramic material allows is large, thus the mechanical property that can regulate easily the gained matrix material, to satisfy the requirement in different application field.
Embodiment
Below in conjunction with two specific embodiments, the present invention is further understood in exemplary illustration and help.But the embodiment detail only is for the present invention is described, does not represent the whole technical schemes of the present invention under conceiving, and therefore should not be construed as the restriction to technical scheme of the present invention.Some do not depart from the unsubstantiality of the present invention's design changes, and for example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to rights protection scope of the present invention.
Embodiment 1
A kind of cubic boron nitride-carborundum composite-phase ceramic material preparation method may further comprise the steps:
Step 1, be the mixed powder that the carbon dust of resol powder, the 10g of cubic boron nitride particle, the 10g of 80g forms with composition proportion, with alcohol 100g, wet mixing ball milling 12 h on high energy ball mill, powder behind the ball milling is crossed 200 mesh sieves after 80 ℃ of oven dry, extracting screen underflow is as mixed powder, get mixed powder 50g and put into mould, obtain green compact at 300 ℃ with the 35MPa Forming under Pressure;
Step 2, green compact obtain the cubic boron nitride ceramic blank after 900 ℃ of lower heat preservation hot are processed 1 h;
Step 3 is positioned over blank in the plumbago crucible, places the reguline metal silicon of 20 ~ 21 g at blank, 6.8 * 10
-3Under the vacuum environment of Pa, at 1500 ℃ of lower insulation 2 h, obtain sintered blank;
Step 4 behind the sintered blank furnace cooling, is removed the unnecessary silicon on sintered blank surface, obtains fine and close cubic boron nitride-composite material of silicon carbide.
Embodiment 2
A kind of cubic boron nitride-carborundum composite-phase ceramic material, preparation technology may further comprise the steps:
Step 1, be the mixed powder that the silica flour of carbon dust, the 5g of resol powder, the 30g of cubic boron nitride particle, the 25g of 120g forms with composition proportion, with alcohol 200g, wet mixing ball milling 24 h on high energy ball mill, powder behind the ball milling is crossed 200 mesh sieves after 80 ℃ of oven dry, extracting screen underflow is as mixed powder, get mixed powder 50g and put into mould, obtain green compact at 300 ℃ with the 25Mpa Forming under Pressure;
Step 2, green compact obtain the cubic boron nitride ceramic blank after 850 ℃ of lower heat preservation hot are processed 1 h;
Step 3 is positioned over blank in the plumbago crucible, places the granular metal silicon of 18 ~ 19g at blank, 1 * 10
-3Under the vacuum environment of Pa, at 1480 ℃ of lower insulation 2 h, obtain sintered blank;
Step 4 behind the sintered blank furnace cooling, is removed the unnecessary silicon on sintered blank surface, obtains fine and close cubic boron nitride-composite material of silicon carbide.
Claims (3)
1. cubic boron nitride-carborundum composite-phase ceramic material preparation method is characterized in that the preparation method comprises the steps:
Step 1, be 100 parts of the mixed powders that form of 60 ~ 80% cubic boron nitride particle, 10 ~ 15% resol, 10 ~ 15% carbon dust, 0 ~ 10% silica flour with mass percent, with 100 parts of industrial spirit, the wet mixing ball milling is 12 ~ 24 hours on high energy ball mill, powder behind the ball milling is after 80 ℃ of oven dry, cross 200 mesh sieves, extracting screen underflow is as mixed powder, and this mixed powder is obtained green compact at 300 ℃ and 20 ~ 45MPa Forming under Pressure;
Step 2 after 1 h is processed in 800 ~ 900 ℃ of lower insulations, obtains the cubic boron nitride ceramic blank with green compact;
Step 3 is positioned over the cubic boron nitride ceramic blank in the plumbago crucible, places 0.1 ~ 0.3 times powder of blank weight or the silicon of block at blank, 1 * 10
-2~ 1 * 10
-3Under the vacuum environment of Pa, 1480 ~ 1550 ℃ of lower insulations 1 ~ 2 hour, obtain sintered blank;
Step 4 will namely be made cubic boron nitride-carborundum composite-phase ceramic material behind the resulting sintered blank furnace cooling of step 3.
2. cubic boron nitride according to claim 1-carborundum composite-phase ceramic material preparation method is characterized in that: the infiltration that the densified sintering product of diphase ceramic material can be by molten silicon and the silicon carbide that forms the parcel cubic boron nitride be realized.
3. according to the preparation-obtained cubic boron nitride of the described method of claim 1-carborundum composite-phase ceramic material.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529412A (en) * | 2014-12-27 | 2015-04-22 | 西安交通大学 | Preparation method of nano-scale hexagonal boron nitride/silicon dioxide multi-phase ceramic material |
| CN104844225A (en) * | 2015-06-08 | 2015-08-19 | 齐鲁工业大学 | SiC-coated hexagonal boron nitride composite powder modified self-lubricating ceramic cutter material and preparation method thereof |
| CN106064946A (en) * | 2016-05-31 | 2016-11-02 | 台州东新密封有限公司 | Mechanical seal SiC/ graphite diphase ceramic material and preparation method thereof |
| CN107324790A (en) * | 2017-06-01 | 2017-11-07 | 内蒙古工业大学 | Forsterite-silicon carbide composite ceramic materials and its synthetic method |
| CN110964228A (en) * | 2019-11-25 | 2020-04-07 | 西北工业大学 | Silicon carbide-boron nitride nanosheet heterogeneous filler and preparation method thereof, and epoxy resin heat-conducting composite material and preparation method thereof |
| CN113480319A (en) * | 2021-08-20 | 2021-10-08 | 广东工业大学 | Low-dielectric-constant silicon carbide and high-performance silicon nitride ceramic substrate and preparation method thereof |
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| CN1060669A (en) * | 1990-10-17 | 1992-04-29 | 西北工业大学 | Ceramic binder cubic boron nitride compound emery wheel and grinding fluid thereof |
| CN101293772A (en) * | 2008-05-30 | 2008-10-29 | 上海工程技术大学 | Preparation technique for SiC/CNTs composite ceramic |
| CN101591194A (en) * | 2009-05-13 | 2009-12-02 | 桂林矿产地质研究院 | A kind of composite material for superhard cutting tool |
| CN102557647A (en) * | 2011-12-13 | 2012-07-11 | 河南富耐克超硬材料股份有限公司 | Polycrystalline cubic boron nitride compound material |
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Patent Citations (4)
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| CN1060669A (en) * | 1990-10-17 | 1992-04-29 | 西北工业大学 | Ceramic binder cubic boron nitride compound emery wheel and grinding fluid thereof |
| CN101293772A (en) * | 2008-05-30 | 2008-10-29 | 上海工程技术大学 | Preparation technique for SiC/CNTs composite ceramic |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529412A (en) * | 2014-12-27 | 2015-04-22 | 西安交通大学 | Preparation method of nano-scale hexagonal boron nitride/silicon dioxide multi-phase ceramic material |
| CN104529412B (en) * | 2014-12-27 | 2016-06-29 | 西安交通大学 | A kind of preparation method of nanoscale hexagonal boron nitride/silicon dioxide diphase ceramic material |
| CN104844225A (en) * | 2015-06-08 | 2015-08-19 | 齐鲁工业大学 | SiC-coated hexagonal boron nitride composite powder modified self-lubricating ceramic cutter material and preparation method thereof |
| CN104844225B (en) * | 2015-06-08 | 2016-07-27 | 齐鲁工业大学 | Self-lubrication ceramic cutter material of carborundum cladding hexagonal boron nitride powder modified and preparation method thereof |
| CN106064946A (en) * | 2016-05-31 | 2016-11-02 | 台州东新密封有限公司 | Mechanical seal SiC/ graphite diphase ceramic material and preparation method thereof |
| CN107324790A (en) * | 2017-06-01 | 2017-11-07 | 内蒙古工业大学 | Forsterite-silicon carbide composite ceramic materials and its synthetic method |
| CN107324790B (en) * | 2017-06-01 | 2020-04-10 | 内蒙古工业大学 | Forsterite-silicon carbide composite ceramic material and synthesis method thereof |
| CN110964228A (en) * | 2019-11-25 | 2020-04-07 | 西北工业大学 | Silicon carbide-boron nitride nanosheet heterogeneous filler and preparation method thereof, and epoxy resin heat-conducting composite material and preparation method thereof |
| CN113480319A (en) * | 2021-08-20 | 2021-10-08 | 广东工业大学 | Low-dielectric-constant silicon carbide and high-performance silicon nitride ceramic substrate and preparation method thereof |
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| CN102924087B (en) | 2014-07-02 |
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