CN103101911A - AlCr2C powder and preparation method thereof - Google Patents
AlCr2C powder and preparation method thereof Download PDFInfo
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- CN103101911A CN103101911A CN2013100675498A CN201310067549A CN103101911A CN 103101911 A CN103101911 A CN 103101911A CN 2013100675498 A CN2013100675498 A CN 2013100675498A CN 201310067549 A CN201310067549 A CN 201310067549A CN 103101911 A CN103101911 A CN 103101911A
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Abstract
The invention relates to AlCr2C powder and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps of: firstly weighing metal aluminum powder, metal chromium powder and graphite powder according to the condition that the molar ratio of Al to Cr to C is 1:2:1, putting the mixture in a ball mill, and mixing and milling for 5-30 hours in the presence of argon or nitrogen, thereby obtaining the AlCr2C powder, wherein the milling medium in the ball mill is a tungsten carbide ball; the particle size of the metal aluminum powder is 5-200 micrometers; the Al content in the metal aluminum powder is greater than or equal to 97wt%; the particle size of the metal chromium powder is 5-200 micrometers; the Cr content in the chromium powder is greater than or equal to 97wt%; the particle size of the graphite powder is 5-200 micrometers; and the C content in the graphite powder is greater than or equal to 97wt%. The preparation method disclosed by the invention is simple in process and low in cost and has the advantages that micrometer or nanometer scale AlCr2C powder can be prepared and the particle size of the prepared AlCr2C powder is 5 nanometers to 100 micrometers. The prepared AlCr2C powder has the characteristics of stable performance, excellent corrosion resistance and good thermal shock resistance and is suitable for preparing high-temperature ceramics and fire resistant materials.
Description
Technical field
The invention belongs to pyroceramic and technical field of refractory materials, relate in particular to a kind of AlCr
2C powder and preparation method thereof.
Background technology
Carbide is one group of material that fusing point is very high, all more than 3000 ℃, the oxidation-resistance of carbide is relatively poor, generally namely begins oxidation at red heat temperature for the fusing point of a lot of carbide (or distillation), but most resistance of oxidation is stronger than dystectic metal, and is slightly more better than graphite and carbon.Most of carbide have good conduction and thermal conductivity, and simultaneously a lot of carbide have very high hardness, thereby carbide has a wide range of applications in the industry manufacturing.
The raw material of making carbide articles is all synthetic, and the synthetic method of carbide raw material has three kinds:
(1) the direct chemical combination of metal and carbon dust, temperature of reaction is different because of thing, about 1200 ~ 2200 ℃;
(2) metal and carbonaceous gas at high temperature interact;
(3) metal oxide and carbon effect, also claim carbon reduction method, that mixture frit reaction in electric arc furnace with metal oxide and carbon is synthetic or in vacuum, hydrogen, rare gas element or other reducing atmosphere, under lower than the metal oxide melting temperature, also carry out with it the solid state reaction synthesizing carbide by the carbon reducing metal oxide.
Though above-mentioned synthetic method respectively has its advantage, the shortcoming that exists be the method more complicated that prepare carbide, facility investment greatly and expense higher.
Summary of the invention
The present invention is intended to overcome the prior art defective, and purpose is to provide that a kind of technique is simple, lower-cost AlCr
2The preparation method of C powder, prepared AlCr
2The C powder body material has stable performance, erosion-resisting characteristics excellence and the good characteristics of thermal shock resistance, is suitable for preparing pyroceramic and refractory materials.
For achieving the above object, the technical solution used in the present invention is: be first that 1 ︰ 2 ︰ 1 prepare burden with metallic aluminium powder, hafnium metal powfer and Graphite Powder 99 by the mol ratio of Al ︰ Cr ︰ C, then put into ball mill, mix grinding is 5 ~ 30 hours under argon gas or nitrogen atmosphere, makes AlCr
2The C powder.
The medium of milling in ball mill is tungsten-carbide ball.
The granularity of described metallic aluminium powder is 5 ~ 200 μ m, the Al content 〉=97wt% in metallic aluminium powder.
The granularity of described hafnium metal powfer is 5 ~ 200 μ m, the Cr content 〉=97wt% in chromium powder.
The granularity of described Graphite Powder 99 is 5 ~ 200 μ m, the C content 〉=97wt% in Graphite Powder 99.
Owing to adopting technique scheme, the present invention is by impacting for a long time, collide between powder and ball-milling medium and fragmentation, make powder particle repeatedly produce cold welding and fracture, cause powder granule refinement, atomic diffusion, the active increase of fresh surface and surface free energy to reduce, thereby greatly promote chemical reaction course, improved powder characteristic.Prepared AlCr
2The C powder body material in use, the surface can generate corundum chromium solid solution (Al
2O
3Cr
2O
3), corundum chromium material has good mechanical property and corrosion resistance, thereby is conducive to extend prepared AlCr
2The life-span of C powder body material.
The method of the relatively existing high pressure-temperature synthesizing carbide of the present invention, preparation technology is simple, and cost is low, can prepare micron or nano level AlCr
2The C powder.Prepared AlCr
2The granularity of C powder is 5nm ~ 100 μ m, has stable performance, erosion-resisting characteristics excellence and the good characteristics of thermal shock resistance, is suitable for preparing pyroceramic and refractory materials.
Embodiment
The present invention will be further described below in conjunction with embodiment, is not the restriction to its protection domain.
For avoiding repetition, the existing technical parameter unification that this embodiment is related is described below, and repeats no more in embodiment:
The granularity of described metallic aluminium powder is 5 ~ 200 μ m, the Al content 〉=97wt% in metallic aluminium powder;
The granularity of described hafnium metal powfer is 5 ~ 200 μ m, the Cr content 〉=97wt% in chromium powder;
The granularity of described Graphite Powder 99 is 5 ~ 200 μ m, the C content 〉=97wt% in Graphite Powder 99;
The medium of milling in ball mill is tungsten-carbide ball.
Embodiment 1
A kind of AlCr
2C powder and preparation method thereof.Be first that 1 ︰ 2 ︰ 1 prepare burden with metallic aluminium powder, hafnium metal powfer and Graphite Powder 99 by the mol ratio of Al ︰ Cr ︰ C, then put into ball mill, mix grinding is 5 ~ 10 hours under argon gas or nitrogen atmosphere, makes AlCr
2The C powder.
The AlCr that the present embodiment is prepared
2The granularity of C powder is 20 μ m ~ 100 μ m.
Embodiment 2
A kind of AlCr
2C powder and preparation method thereof.Be first that 1 ︰ 2 ︰ 1 prepare burden with metallic aluminium powder, hafnium metal powfer and Graphite Powder 99 by the mol ratio of Al ︰ Cr ︰ C, then put into ball mill, mix grinding is 10 ~ 15 hours under argon gas or nitrogen atmosphere, makes AlCr
2The C powder.
The AlCr that the present embodiment is prepared
2The granularity of C powder is 5 μ m ~ 20 μ m.
Embodiment 3
A kind of AlCr
2C powder and preparation method thereof.Be first that 1 ︰ 2 ︰ 1 prepare burden with metallic aluminium powder, hafnium metal powfer and Graphite Powder 99 by the mol ratio of Al ︰ Cr ︰ C, then put into ball mill, mix grinding is 15 ~ 20 hours under argon gas or nitrogen atmosphere, makes AlCr
2The C powder.
The AlCr that the present embodiment is prepared
2The granularity of C powder is 200nm ~ 5 μ m.
Embodiment 4
A kind of AlCr
2C powder and preparation method thereof.Be first that 1 ︰ 2 ︰ 1 prepare burden with metallic aluminium powder, hafnium metal powfer and Graphite Powder 99 by the mol ratio of Al ︰ Cr ︰ C, then put into ball mill, mix grinding is 20 ~ 25 hours under argon gas or nitrogen atmosphere, makes AlCr
2The C powder.
The AlCr that the present embodiment is prepared
2The granularity of C powder is 50nm ~ 200nm.
Embodiment 5
A kind of AlCr
2C powder and preparation method thereof.Be first that 1 ︰ 2 ︰ 1 prepare burden with metallic aluminium powder, hafnium metal powfer and Graphite Powder 99 by the mol ratio of Al ︰ Cr ︰ C, then put into ball mill, mix grinding is 25 ~ 30 hours under argon gas or nitrogen atmosphere, makes AlCr
2The C powder.
The AlCr that the present embodiment is prepared
2The granularity of C powder is 5nm ~ 50nm.
This embodiment is by impacting for a long time, collide between powder and ball-milling medium and fragmentation, make powder particle repeatedly produce cold welding and fracture, cause powder granule refinement, atomic diffusion, the active increase of fresh surface and surface free energy to reduce, thereby greatly promote chemical reaction course, improved powder characteristic.Prepared AlCr
2The C powder body material in use, the surface can generate corundum chromium solid solution (Al
2O
3Cr
2O
3), corundum chromium material has good mechanical property and corrosion resistance, thereby is conducive to extend prepared AlCr
2The life-span of C powder body material.
The method of the relatively existing high pressure-temperature synthesizing carbide of this embodiment, preparation technology is simple, and cost is low, can prepare micron or nano level AlCr
2The C powder.Prepared AlCr
2The granularity of C powder is 5nm ~ 100 μ m, has stable performance, erosion-resisting characteristics excellence and the good characteristics of thermal shock resistance, is suitable for preparing pyroceramic and refractory materials.
Claims (5)
1. AlCr
2The preparation method of C powder is characterized in that first be that 1 ︰ 2 ︰ 1 prepare burden with metallic aluminium powder, hafnium metal powfer and Graphite Powder 99 by the mol ratio of Al ︰ Cr ︰ C, then puts into ball mill, and mix grinding is 5 ~ 30 hours under argon gas or nitrogen atmosphere, makes AlCr
2The C powder;
The medium of milling in ball mill is tungsten-carbide ball.
2. AlCr according to claim 1
2The preparation method of C powder, the granularity that it is characterized in that described metallic aluminium powder is 5 ~ 200 μ m, the Al content 〉=97wt% in metallic aluminium powder.
3. AlCr according to claim 1
2The preparation method of C powder, the granularity that it is characterized in that described hafnium metal powfer is 5 ~ 200 μ m, the Cr content 〉=97wt% in chromium powder.
4. AlCr according to claim 1
2The preparation method of C powder, the granularity that it is characterized in that described Graphite Powder 99 is 5 ~ 200 μ m, the C content 〉=97wt% in Graphite Powder 99.
5. AlCr
2The C powder is characterized in that described AlCr
2The C powder is the described AlCr of any one according to claim 1 ~ 4
2The AlCr that the preparation method of C powder is prepared
2The C powder.
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| CN2013100675498A CN103101911A (en) | 2013-03-04 | 2013-03-04 | AlCr2C powder and preparation method thereof |
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| CN2013100675498A CN103101911A (en) | 2013-03-04 | 2013-03-04 | AlCr2C powder and preparation method thereof |
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Family
ID=48310159
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789594A (en) * | 2014-02-17 | 2014-05-14 | 武汉科技大学 | Method for preparing AlCr2C material based on induction furnace melting |
| CN112768835A (en) * | 2021-01-07 | 2021-05-07 | 陈云 | Cr (chromium)3AlC2Preparation method of/PVDF-PVA lithium ion battery diaphragm |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743480A (en) * | 2005-09-29 | 2006-03-08 | 中国科学院上海硅酸盐研究所 | A kind of preparation method of aluminium-carbon-dichromium block material |
| CN101265104A (en) * | 2008-04-25 | 2008-09-17 | 北京交通大学 | Constant pressure synthesis method for aluminum chromium carbide ceramic powder |
| CN101423215A (en) * | 2008-11-27 | 2009-05-06 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing Al4SiC4 powder |
-
2013
- 2013-03-04 CN CN2013100675498A patent/CN103101911A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743480A (en) * | 2005-09-29 | 2006-03-08 | 中国科学院上海硅酸盐研究所 | A kind of preparation method of aluminium-carbon-dichromium block material |
| CN101265104A (en) * | 2008-04-25 | 2008-09-17 | 北京交通大学 | Constant pressure synthesis method for aluminum chromium carbide ceramic powder |
| CN101423215A (en) * | 2008-11-27 | 2009-05-06 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing Al4SiC4 powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789594A (en) * | 2014-02-17 | 2014-05-14 | 武汉科技大学 | Method for preparing AlCr2C material based on induction furnace melting |
| CN112768835A (en) * | 2021-01-07 | 2021-05-07 | 陈云 | Cr (chromium)3AlC2Preparation method of/PVDF-PVA lithium ion battery diaphragm |
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Application publication date: 20130515 |