CN101376171A - Method for preparing reinforced aluminum-base compound material with locally distributed granule - Google Patents
Method for preparing reinforced aluminum-base compound material with locally distributed granule Download PDFInfo
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- CN101376171A CN101376171A CNA2008102009289A CN200810200928A CN101376171A CN 101376171 A CN101376171 A CN 101376171A CN A2008102009289 A CNA2008102009289 A CN A2008102009289A CN 200810200928 A CN200810200928 A CN 200810200928A CN 101376171 A CN101376171 A CN 101376171A
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Abstract
The invention discloses a method for preparing an alumina-based composite material reinforced by localized distribution particles in the field of metal base composite material, which comprises the following steps: firstly, composite particles with the volume fraction of 40% to 60% are prepared through ceramic particles and metals; then the composite material is prepared by compounding the composite particles with another metal alloy, wherein the composite particles can be prepared by a method of high energy ball milling, or directly utilizing machining waste chips of a high volume composite material as the composite particles; and the composite particles compound with another metal through a powder metallurgy process or by a vacuum pressure infiltration method. Since the low intensity metal is provided with high plastic deformation capacity and good bearing capacity of a high-strength basal body, so that the concentration of stress caused by the particles can be effectively relieved; and as a result of the load distribution, the crack extension of the composite material is alternatively extended along the interface of the composite particles and the high-strength alloy and in the high-strength basal body, thereby greatly increasing the extension paths of the cracks and obviously improving the toughening effect of a localized toughening method.
Description
Technical field
That the present invention relates to is a kind of preparation method of field of compound material, specifically is a kind of preparation method of reinforced aluminum-base compound material with locally distributed granule.
Background technology
Advantages such as discontinuous enhancing metal-base composites is the class material that wild phase and metal composite form, and has high specific strength and specific stiffness, and is wear-resisting, and mechanics and physical property designability are strong are widely used in fields such as Aero-Space, automobile and Electronic Packaging.Its main deficiency is that toughness is not high.Be to solve the not high problem of toughness, compound back secondary operations is toughness reinforcing, structure malleableize and localization method for toughening are used.The toughness reinforcing leeway of secondary operations, compound back is limited.Compound back secondary operations is toughness reinforcing all to cause material to present anisotropy with the structure malleableize.The composite of localization method for toughening preparation has isotropic advantage, is a kind of promising method for toughening therefore.
Find through literature search prior art, with the closest document of the present invention for being published in Journal ofMicroscopy, 2001,201 (Pt2): one piece of article that is entitled as Novel MMC microstructurewith tailored distribution of the reinforcing phase on the 333-338.The method of this technical description is: in polyethylene can, do not having under the abrasive media situation, speed with 80 rev/mins, make alumina short fibre turn a somersault (tumbling), after the screening, with punching block suitable dimension alumina short fibre aggregate is pressed into volume fraction and divides 10% the local that has reunite to strengthen the body prefabricated component, with squeeze casting method liquid 6061 aluminium alloys are infiltrated up in the prefabricated component then.No matter be that particle compact district or no granulomere have only with a kind of metallic matrix in such composite, limited toughening effect widely.And, can only adopt liquid infiltration method to prepare the localization composite owing to only contain ceramic particle in the prefabricated component before compound.
Summary of the invention
The objective of the invention is to provides a kind of preparation method of reinforced aluminum-base compound material with locally distributed granule at the deficiencies in the prior art part, solves the problem of localization method for toughening toughening effect finite sum preparation method limitation.
The present invention is achieved by the following technical solutions, the present invention at first adopts ceramic particle and low-intensity alloy to prepare the composite particles of high-volume fractional, and then it is composite particles and high-strength alloy is compound, thereby prepare the localization composite that contains two kinds of varying strength matrixes, there are two kinds of intensity metals in the whole composite, metal in the composite particles is the low-intensity fine aluminium, and another metal compound with composite particles is high-strength alloy (strength level is higher than LY12).
The inventive method comprises the steps:
The first step mixes ceramic particle, low-intensity alloy (fine aluminium powder) and process promoter stearic acid, adopts mechanical ball milling to prepare composite particles, and wherein to account for the volume fraction of composite particles be 40% to 60% to ceramic particle; Or directly utilize high-volume fractional composite machined scrap as composite particles;
Described ceramic particle, its particle diameter are 5 μ m-20 μ m.
Described fine aluminium powder is 100 orders-200 an order powder.
Described process promoter stearic acid, its consumption account for 4% of ceramic particle and fine aluminium particle gross weight.
Described composite particles, its size range are 0.1mm-1mm.
Described employing mechanical ball milling is prepared composite particles, is meant: earlier with 64 rev/mins of batch mixings 20 minutes, the speed of bringing up to 426 rev/mins then turned round, and ball mill carried out alternate run in per 60 minutes.Ball milling 8 hours obtains the ceramic particle volume fraction and is 40%-60% composite particles.
Second step directly was pressed into prefabricated component with composite particles, or composite particles and high-strength alloy (strength level is higher than LY12) powder, outgased in the aluminium jacket of packing into, after the degassing aluminium jacket was sealed;
Described composite particles and high-strength alloy powder are meant: high-strength alloy powder and composite particles are put into ball mill together, with 64 rev/mins of batch mixings 60 minutes.
The 3rd the step, by the vacuum pressure infiltration method with above-mentioned prefabricated component and the compound reinforced aluminum-base compound material with locally distributed granule that contains two kinds of varying strength matrixes of preparing of high-strength liquid metal; Or the aluminium jacket of above-mentioned sealing is put in the high temperature insostatic pressing (HIP) stove, prepare the reinforced aluminum-base compound material with locally distributed granule that contains two kinds of varying strength matrixes by powder metallurgy process.
Because the low-intensity fine aluminium has strong plastic deformation ability, high strength matrix (as LY12) has good bearing capacity, can effectively alleviate the stress that particle causes and concentrate.Because the result of this load distribution, crackle expansion is alternately expansion in the interface of composite particles and high-strength alloy and the high-strength matrix in this material, increase the extensions path of crackle widely, thereby can improve the toughening effect of localization method for toughening significantly.
In resulting material of second step; owing to comprise metal in the composite particles; promptly can make prefabricated component by composite particles; adopt the method for liquid infiltration to prepare localization composite (preheat temperature of prefabricated component is starkly lower than the fusing point of metal in the composite particles); also can mix, prepare the localization composite with powder metallurgy process then with composite particles and high-strength alloy particle.
The present invention has the following advantages:
(1) prepared material has high toughness (fracture toughness is up to 32.6MPm
1/2), and material presents the isotropism mechanical property;
(2) locally distributed granule enhancing metal-base composites promptly can adopt the liquid infiltration preparation, can adopt the powder metallurgic method preparation again, and the preparation method is flexible, and selectivity is big.
(3) the high-volume fractional composite particles also can utilize high volume composite material machining scrap as composite particles, helps the recycling of discarded composite.
The specific embodiment
Below embodiments of the invention are elaborated: present embodiment has provided detailed embodiment and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The first step: claim 200 order pure aluminium powder 68.64 grams; average grain diameter is silicon-carbide particle 81.36 grams of 20 μ m; stearic acid 6 gram (process promoter), 3 kilograms of stainless steel balls (diameter be 12 millimeters and 6 millimeters half and half) are put into (being that ratio of grinding media to material is 20:1) in the ball grinder, vacuumize the back and lead to argon shield.Ball grinder is put in QM-1SP4 planetary ball mill (Nanjing Univ. Instrument Factory), and after fixedly securing, earlier with 64 rev/mins of batch mixings 20 minutes, the speed of bringing up to 426 rev/mins then turned round, and ball mill carried out alternate run in per 60 minutes.Ball milling 8 hours obtains the silicon-carbide particle volume fraction and is 50% composite particles.
Second step: claim 200 order LY12 alloy aluminium powders 205.95 grams, put into ball mill together with the above-mentioned composite particles that makes,, then the powder that mixes is taken out with 64 rev/mins of batch mixings 60 minutes, pack into and carry out 200 ℃ of degassings 1 hour in the aluminium jacket, again 350 ℃ of degassings 2 hours.After the degassing aluminium jacket is sealed.
The 3rd step: the aluminium jacket of above-mentioned sealing is put in the high temperature insostatic pressing (HIP) stove, 460 ℃ of high temperature insostatic pressing (HIP)s 4 hours.
Through above-mentioned three steps, the total volume fraction that can prepare densification is 20% localization distribution enhancing aluminum-base composite material by silicon carbide particles.
Embodiment 2
The first step: claim 200 order pure aluminium powder 68.64 grams; average grain diameter is silicon-carbide particle 81.36 grams of 20 μ m; stearic acid 6 gram (process promoter), 3 kilograms of stainless steel balls (diameter be 12 millimeters and 6 millimeters half and half) are put into (being that ratio of grinding media to material is 20:1) in the ball grinder, vacuumize the back and lead to argon shield.Ball grinder is put in QM-1SP4 planetary ball mill, and after fixedly securing, earlier with 64 rev/mins of batch mixings 20 minutes, the speed of bringing up to 426 rev/mins then turned round, and ball mill carried out alternate run in per 60 minutes.Ball milling 8 hours obtains the silicon-carbide particle volume fraction and is 50% composite particles.
Second step: in above-mentioned composite particles, add 5 PCA binding agents, be uniformly dispersed, put into the mould of φ 38 * 50 then and suppress, be pressed into 112.09 millimeters high prefabricated components.
The 3rd step: the above-mentioned prefabricated component that makes is put into the infiltration that the vacuum pressure infiltration stove carries out liquid LY12 alloy.Infiltration Technics is: the prefabricated component preheat temperature is 550 ℃, and 780 ℃ of liquid duralumin LY12 heating-up temperatures after vacuumizing, are closed vacuum system, and then to the furnace chamber pressurising, pressure is 7.0-9.0MPa.
Through above-mentioned three steps, the total volume fraction that can prepare densification is 20% localization distribution enhancing aluminum-base composite material by silicon carbide particles.
Embodiment 3
The first step: claim 200 order pure aluminium powder 76.15 grams; average grain diameter is silicon-carbide particle 73.85 grams of 20 μ m; stearic acid 6 gram (process promoter), 3 kilograms of stainless steel balls (diameter be 12 millimeters and 6 millimeters half and half) are put into (being that ratio of grinding media to material is 20:1) in the ball grinder, vacuumize the back and lead to argon shield.Ball grinder is put in QM-1SP4 planetary ball mill, and after fixedly securing, earlier with 64 rev/mins of batch mixings 20 minutes, the speed of bringing up to 426 rev/mins then turned round, and ball mill carried out alternate run in per 60 minutes.Ball milling 8 hours obtains the silicon-carbide particle volume fraction and is 45% composite particles.
Second step: in above-mentioned composite particles, add 5 PCA binding agents, be uniformly dispersed, put into the mould of φ 38 * 50 then and suppress, be pressed into 101.75 millimeters high prefabricated components.
The 3rd step: the above-mentioned prefabricated component that makes is put into the infiltration that the vacuum pressure infiltration stove carries out liquid LY12 alloy.Infiltration Technics is: the prefabricated component preheat temperature is 550 ℃, and 780 ℃ of liquid duralumin LY12 heating-up temperatures after vacuumizing, are closed vacuum system, and then to the furnace chamber pressurising, pressure is 7.0-9.0MPa.
Through above-mentioned three steps, the total volume fraction that can prepare densification is 20% localization distribution enhancing aluminum-base composite material by silicon carbide particles.
Claims (7)
1, a kind of preparation method of reinforced aluminum-base compound material with locally distributed granule is characterized in that comprising the steps:
The first step mixes ceramic particle and fine aluminium powder and process promoter stearic acid, adopts mechanical ball milling to prepare composite particles, and wherein to account for the volume fraction of composite particles be 40% to 60% to ceramic particle; Or directly utilize high-volume fractional composite machined scrap as composite particles;
Second step directly was pressed into prefabricated component with composite particles, or composite particles and high-strength alloy powder, outgased in the aluminium jacket of packing into, and with the sealing of aluminium jacket, wherein high-strength alloy is meant that strength level is higher than the alloy of LY12 after the degassing;
The 3rd the step, by the vacuum pressure infiltration method with above-mentioned prefabricated component and the compound reinforced aluminum-base compound material with locally distributed granule that contains two kinds of varying strength matrixes of preparing of high-strength liquid metal; Or the aluminium jacket of above-mentioned sealing is put in the high temperature insostatic pressing (HIP) stove, prepare the reinforced aluminum-base compound material with locally distributed granule that contains two kinds of varying strength matrixes by powder metallurgy process.
2, the preparation method of reinforced aluminum-base compound material with locally distributed granule according to claim 1 is characterized in that, described ceramic particle, its particle diameter are 5 μ m-20 μ m.
3, the preparation method of reinforced aluminum-base compound material with locally distributed granule according to claim 1 is characterized in that, described fine aluminium powder is 100 orders-200 an order powder.
4, the preparation method of reinforced aluminum-base compound material with locally distributed granule according to claim 1 is characterized in that, described process promoter stearic acid, its consumption account for 4% of ceramic particle and fine aluminium particle gross weight.
5, the preparation method of reinforced aluminum-base compound material with locally distributed granule according to claim 1 is characterized in that, described composite particles, and its size range is 0.1mm-1mm.
6, the preparation method of reinforced aluminum-base compound material with locally distributed granule according to claim 1, it is characterized in that, described employing mechanical ball milling is prepared composite particles, be meant: earlier with 64 rev/mins of rotating speeds, batch mixing 20 minutes, bring up to 426 rev/mins rotating speed then, ball mill carried out alternate run in per 60 minutes; Ball milling 8 hours obtains the ceramic particle volume fraction and is 40%-60% composite particles.
7, the preparation method of reinforced aluminum-base compound material with locally distributed granule according to claim 1, it is characterized in that, described composite particles and high-strength alloy powder, be meant: high-strength alloy powder and composite particles are put into ball mill together, with 64 rev/mins of rotating speeds, batch mixing 60 minutes.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838755A (en) * | 2010-06-13 | 2010-09-22 | 上海交通大学 | Local particle reinforced metal matrix composite material and preparation method thereof |
| CN103667849A (en) * | 2012-09-24 | 2014-03-26 | 中国兵器科学研究院宁波分院 | Metal-base ceramic composite material as well as manufacturing method and application thereof |
| CN104057086A (en) * | 2014-07-10 | 2014-09-24 | 哈尔滨工业大学 | Preparation method for titanium and aluminum alloy-hexagonal boron nitride ceramic conductive cathode material |
| CN104493169A (en) * | 2014-12-26 | 2015-04-08 | 中国科学院长春光学精密机械与物理研究所 | Ceramic particle local reinforced metal heat sink and preparing method thereof |
| CN105349817A (en) * | 2015-10-29 | 2016-02-24 | 无锡桥阳机械制造有限公司 | Technology for preparing composite material |
| CN108315577A (en) * | 2018-02-02 | 2018-07-24 | 上海交通大学 | Laser gain material manufacture 7XXX systems in-situ Al-base composition powder and preparation |
| CN109261971A (en) * | 2018-08-29 | 2019-01-25 | 天津大学 | One kind is for improving nanometer CuAl2/Al2O3The speed change ball milling powder mixing method of reinforced aluminum matrix composites uniformity |
| CN111592274A (en) * | 2020-06-01 | 2020-08-28 | 瑞创三维新材料(深圳)有限公司 | Oxide ceramic reinforced light-cured material for making three-dimensional objects |
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2008
- 2008-10-09 CN CNA2008102009289A patent/CN101376171A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838755A (en) * | 2010-06-13 | 2010-09-22 | 上海交通大学 | Local particle reinforced metal matrix composite material and preparation method thereof |
| CN103667849A (en) * | 2012-09-24 | 2014-03-26 | 中国兵器科学研究院宁波分院 | Metal-base ceramic composite material as well as manufacturing method and application thereof |
| CN103667849B (en) * | 2012-09-24 | 2016-03-30 | 中国兵器科学研究院宁波分院 | A kind of metal matrix ceramic composites and manufacture method thereof and application |
| CN104057086A (en) * | 2014-07-10 | 2014-09-24 | 哈尔滨工业大学 | Preparation method for titanium and aluminum alloy-hexagonal boron nitride ceramic conductive cathode material |
| CN104057086B (en) * | 2014-07-10 | 2016-04-20 | 哈尔滨工业大学 | The preparation method of titanium-aluminium alloy genus-hexagonal boron nitride pottery conductive cathode material |
| CN104493169A (en) * | 2014-12-26 | 2015-04-08 | 中国科学院长春光学精密机械与物理研究所 | Ceramic particle local reinforced metal heat sink and preparing method thereof |
| CN105349817A (en) * | 2015-10-29 | 2016-02-24 | 无锡桥阳机械制造有限公司 | Technology for preparing composite material |
| CN108315577A (en) * | 2018-02-02 | 2018-07-24 | 上海交通大学 | Laser gain material manufacture 7XXX systems in-situ Al-base composition powder and preparation |
| CN109261971A (en) * | 2018-08-29 | 2019-01-25 | 天津大学 | One kind is for improving nanometer CuAl2/Al2O3The speed change ball milling powder mixing method of reinforced aluminum matrix composites uniformity |
| CN111592274A (en) * | 2020-06-01 | 2020-08-28 | 瑞创三维新材料(深圳)有限公司 | Oxide ceramic reinforced light-cured material for making three-dimensional objects |
| CN111592274B (en) * | 2020-06-01 | 2022-01-04 | 南雄市瑞晟化学工业有限公司 | Oxide ceramic reinforced light-cured material for making three-dimensional objects |
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