CN102924087B - 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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- CN102924087B CN102924087B CN201210488170.XA CN201210488170A CN102924087B CN 102924087 B CN102924087 B CN 102924087B CN 201210488170 A CN201210488170 A CN 201210488170A CN 102924087 B CN102924087 B CN 102924087B
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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, especially a kind of preparation method of cubic boron nitride-silicon carbide ceramics diphase ceramic material of high-content.
Background technology
The bonding agent of cubic boron nitride can be selected resin, metal or pottery.Adopt the cubic boron nitride superhard material of ceramic bond to there is the common feature of ceramic bond and cubic boron nitride, compared with resin or melts combine CBN material, ceramic binder cubic boron nitride superhard material is as grinding tool material, its grinding capacity is strong, grinding temperature is low, grinding tool durability is high, when grinding, the shape-holding property of grinding tool is good, the parts size precision processing is high, grinding tool entirety self-sharpening is good, finishing interlude is long, when finishing also than being easier to, when grinding, be difficult for stopping up, be difficult for burn workpiece, and can be cooling by various cooling fluids.
In order to reduce the sintering temperature of cubic boron nitride-ceramic superhard material, conventionally in ceramic bond, add various basic oxide (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 decompose the gas producing in cubic boron nitride and the enrichment of ceramic bond interface, generate bubble, thereby the bonding strength between both interfaces is reduced greatly, reduce the hold of bonding agent cubic boron nitride.Compared with other bonding 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, feature 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 above-mentioned defect.
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 the preparation technology of good cubic boron nitride-carborundum composite-phase ceramic material.
Technical scheme of the present invention is achieved by following processing step:
(1) 100 parts of the mixed powders of the cubic boron nitride particle that is 60 ~ 80% by mass percent, 10 ~ 15% resol, 10 ~ 15% carbon dust, 0 ~ 10% silica flour composition, with 100 parts of industrial spirit, wet mixing ball milling 12 ~ 24 hours on high energy ball mill, powder after ball milling is after 80 DEG C of oven dry, cross 200 mesh sieves, extracting screen underflow is as mixed powder, and this mixed powder is obtained to green compact at 300 DEG C and 20 ~ 45MPa Forming under Pressure;
(2) green compact are incubated at 800 ~ 900 DEG C and process after 1 h, obtain cubic boron nitride ceramic blank;
(3) cubic boron nitride ceramic blank is positioned in plumbago crucible, on blank, places the powder of 0.1 ~ 0.3 times of blank weight or the silicon of block, 1 × 10
-2~ 1 × 10
-3under the vacuum environment of Pa, at 1480 ~ 1550 DEG C, be incubated 1 ~ 2 hour, obtain sintered blank;
(4) after sintered blank furnace cooling step 3 being obtained, make cubic boron nitride-carborundum composite-phase ceramic material, the densified sintering product of diphase ceramic material can be realized by the silicon carbide of the infiltration of molten silicon formation parcel cubic boron nitride.
With respect to prior art, the present invention has the following advantages:
1. the processing method of preparing cubic boron nitride-carborundum composite-phase ceramic material proposed by the invention, avoid the necessary problem of carrying out sintering under high-temperature and high-pressure conditions of common process, greatly reduce difficulty and the process costs of preparation, and can prepare goods complex-shaped and that volume is larger;
2. cubic boron nitride-carborundum composite-phase ceramic material of preparation technology's gained that the present invention proposes has high-compactness, thereby has improved the work-ing life of material;
3. the composition variation range that cubic boron nitride-carborundum composite-phase ceramic material that prepared by the present invention allows is large, thereby can regulate easily the mechanical property of gained matrix material, to meet 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 embodiment detail is only for the present invention is described, do not represent the whole technical schemes of the present invention under conceiving, 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, for example, to have simple the change or replacement of technical characterictic of same or similar technique effect, all belong to rights protection scope of the present invention.
Embodiment 1
A preparation method for cubic boron nitride-carborundum composite-phase ceramic material, comprises the following steps:
Step 1, the mixed powder of the resol powder of the cubic boron nitride particle that is 80g by composition proportion, 10g, the carbon dust of 10g composition, with alcohol 100g, wet mixing ball milling 12 h on high energy ball mill, powder after ball milling, after 80 DEG C of oven dry, is crossed 200 mesh sieves, and extracting screen underflow is as mixed powder, get mixed powder 50g and put into mould, obtain green compact at 300 DEG C with 35MPa Forming under Pressure;
Step 2, green compact heat preservation hot at 900 DEG C is processed after 1 h, obtains cubic boron nitride ceramic blank;
Step 3, is positioned over blank in plumbago crucible, places the reguline metal silicon of 20 ~ 21 g, 6.8 × 10 on blank
-3under the vacuum environment of Pa, at 1500 DEG C, be incubated 2 h, obtain sintered blank;
Step 4, after sintered blank furnace cooling, removes 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 comprises the following steps:
Step 1, the mixed powder of the silica flour composition of the resol powder of the cubic boron nitride particle that is 120g by composition proportion, 25g, the carbon dust of 30g, 5g, with alcohol 200g, wet mixing ball milling 24 h on high energy ball mill, powder after ball milling, after 80 DEG C of oven dry, is crossed 200 mesh sieves, and extracting screen underflow is as mixed powder, get mixed powder 50g and put into mould, obtain green compact at 300 DEG C with 25Mpa Forming under Pressure;
Step 2, green compact heat preservation hot at 850 DEG C is processed after 1 h, obtains cubic boron nitride ceramic blank;
Step 3, is positioned over blank in plumbago crucible, places the granular metal silicon of 18 ~ 19g, 1 × 10 on blank
-3under the vacuum environment of Pa, at 1480 DEG C, be incubated 2 h, obtain sintered blank;
Step 4, after sintered blank furnace cooling, removes the unnecessary silicon on sintered blank surface, obtains fine and close cubic boron nitride-composite material of silicon carbide.
Claims (2)
1. a preparation method for cubic boron nitride-carborundum composite-phase ceramic material, preparation method comprises the steps:
Step 1,100 parts of the mixed powders of the cubic boron nitride particle that is 60 ~ 80% by mass percent, 10 ~ 15% resol, 10 ~ 15% carbon dust, 0 ~ 10% silica flour composition, with 100 parts of industrial spirit, wet mixing ball milling 12 ~ 24 hours on high energy ball mill, powder after ball milling is after 80 DEG C of oven dry, cross 200 mesh sieves, extracting screen underflow is as mixed powder, and this mixed powder is obtained to green compact at 300 DEG C and 20 ~ 45MPa Forming under Pressure;
Step 2 is incubated green compact and processes after 1 h at 800 ~ 900 DEG C, obtains cubic boron nitride ceramic blank;
Step 3, is positioned over cubic boron nitride ceramic blank in plumbago crucible, places the powder of 0.1 ~ 0.3 times of blank weight or the silicon of block, 1 × 10 on blank
-2~ 1 × 10
-3under the vacuum environment of Pa, at 1480 ~ 1550 DEG C, be incubated 1 ~ 2 hour, obtain sintered blank;
Step 4, after the sintered blank furnace cooling that step 3 is obtained, make cubic boron nitride-carborundum composite-phase ceramic material, it is characterized in that: the densified sintering product of diphase ceramic material can be realized by the silicon carbide of the infiltration of molten silicon formation parcel cubic boron nitride.
2. according to the preparation-obtained cubic boron nitride-carborundum composite-phase ceramic of method described in claim 1 material.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| 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 |
| CN110964228B (en) * | 2019-11-25 | 2020-12-08 | 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 |
| CN113480319B (en) * | 2021-08-20 | 2023-02-10 | 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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