CN1676640A - Copper-plated graphite granule reinforced magnesium base composite material - Google Patents
Copper-plated graphite granule reinforced magnesium base composite material Download PDFInfo
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- CN1676640A CN1676640A CN 200510024792 CN200510024792A CN1676640A CN 1676640 A CN1676640 A CN 1676640A CN 200510024792 CN200510024792 CN 200510024792 CN 200510024792 A CN200510024792 A CN 200510024792A CN 1676640 A CN1676640 A CN 1676640A
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Abstract
This invention is coppercasting graphite grain reinforcing magnesium-base compound material used in compound material technology field. The basic body is pure magnesium powder or the mixture of magnesium alloy with 70-99% volume percentage and chemical coppercasting graphite grain 1-30%. The chemical coppercasting layer deposits on the graphite surface through chemical coppercasting, the weight percentage of copper is 10-50% of the gross of the graphite grains and the graphite grains take up 50-90%. The strong points of this invention are: it controls the thickness of coppercasting, the graphite volume and the graphite grains well distribute and the surface combination is good and has good mechanic and damp performances and get the magnesium-base compound material with high intension with the integration of damp structure and function and has wide utilization range.
Description
Technical field
What the present invention relates to is a kind of magnesium base composite material that is used for technical field of composite materials, specifically is a kind of copper-plated graphite granule reinforced magnesium base composite material.
Background technology
The damping capacity of material has play a part important in the vibration of control texture and noise, thereby has also prolonged cyclic loading or impacted the service life of material down.Magnesium has the highest damping capacity in all commercial metals structured materials, uses more widely yet weak mechanical property has limited it.Therefore, improve the physical strength of magnesium and keep its inherent high damping properties to become the key problem of numerous researchs.
Through the literature search of prior art is found, (1997, people such as C.Mayencourt publish thesis on 163:357) " high damping composite material: Mg at " Phys.Status.Solidi.A "
2The research of Si/Mg ", this article proposes to prepare fibre reinforced composites Mg by directional solidification processes
2Si/Mg has the suitable tensile strength of industrial cast magnesium alloys AZ63 and damping capacity has improved 10-100 doubly, and there is anisotropy in the performance of the fibre composite that this technology obtains, and the directional solidification processes complexity, is not suitable for suitability for industrialized production.Opening the peasant waits in " material engineering " (1997, No.8:19-21) " the damping behavior research of Gr/Mg matrix material " publishes thesis on, this article has been studied the damping capacity with graphite fibre enhanced magnesium base composite material, but exists graphite fibre to cost an arm and a leg and problem such as compound complicated process of preparation.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of copper-plated graphite granule reinforced magnesium base composite material is provided.Make it have good damping performance, copper (Cu) coating on graphite (Gr) surface can effectively be improved wetting between graphite and the pure magnesium matrix, acceleration of sintering, thus improve final mechanical property, reach the application requiring of structure-function integration.
The present invention is achieved by the following technical solutions, and matrix of the present invention is that the long-pending per-cent 70%-99% of pure magnesium powder or magnesium alloy-powder gets with the volume percent that contains chemical plating copper layer graphite granule 1%-30% is mixed.
Described chemical plating copper layer be by electroless copper in the sedimentary layer of copper coating of graphite surface, the weight percent of copper accounts for and contains 10%～50% of chemical plating copper layer graphite granule gross weight, the weight percent of graphite granule is 50%～90%.
The described chemical plating copper layer graphite granule that contains is a wild phase;
Described pure magnesium powder or magnesium alloy-powder are the matrix phase;
The described chemical plating copper layer that contains is the interfacial layer that obtains by in the graphite granule Electroless copper, makes the matrix material acquisition intensity of manufacturing and the matched well of damping capacity.
Copper-plated graphite granule, pure magnesium powder or magnesium alloy powder are mixed with a kind of technology of powder metallurgy, and through colding pressing, obtaining even particle distribution, interface in conjunction with magnesium base composite material good, dense structure behind sintering and the hot extrude.Graphite has high intrinsic damp performance, and the interfacial effect of matrix material can guarantee that matrix material of the present invention has good damping performance in addition.The Cu coating of graphite surface can effectively be improved wetting between graphite and the magnesium matrix, acceleration of sintering, thus improve final mechanical property, reach the application requiring of structure-function integration.
Material of the present invention has the comprehensive of excellent mechanical property and damping capacity.Table 1 has compared the room-temperature mechanical property of pure magnesium and matrix material thereof, and obviously the mechanical property and the damping capacity of copper-plated graphite granule reinforced magnesium base composite material are good as can be seen.
The mechanical property of pure magnesium of table 1 and matrix material thereof
Material yield intensity (MPa) tensile strength (MPa) unit elongation (%)
Mg 89 108 9.8
20Vol% copper facing Gr/Mg 183 210 1.2
Because the interface of magnesium base composite material is remarkable to the influence of its mechanical property and damping capacity, the present invention adopts graphite granule copper coating method to obtain having the magnesium base composite material of particular interface layer, makes it have the comprehensive of good mechanical performance and damping capacity.
The advantage of copper-plated graphite granule reinforced magnesium base composite material of the present invention just is, it by control suitable copper coating thickness, graphite granule volume fraction and powder metallurgy technology and be aided with that graphite granule is evenly distributed in the novel magnesium base composite material that hot-extrusion prepares, the interface is in conjunction with good, and have excellent mechanical performances and damping capacity concurrently, obtain the magnesium base composite material of a kind of high-intensity high-damping structure and function integration, have wide application field.
Embodiment
Below the present invention is further illustrated with embodiment, will help the present invention is further understood, and protection scope of the present invention is not subjected to the qualification of these embodiment, and protection scope of the present invention is limited by claims.
Embodiment 1
Present embodiment is a wild phase with graphite (Gr) particle of electroless copper (Cu), is the matrix phase with pure magnesium, by obtaining special interfacial layer in the graphite granule Electroless copper, makes the matrix material acquisition intensity of manufacturing and the matched well of damping capacity.Adopting the Gr particle of pure magnesium powder of 40 μ m and 20 μ m is the starting powder material, and the percent by volume of Gr particle is 1%.In Gr particle surface chemical plating weight ratio is 10% Cu coating, and the electroless copper coating evenly covers the graphite granule surface with superfine little particulate state.Then through mixing powder, cold pressing, obtaining even particle distribution, dense structure, interface in conjunction with good matrix material behind sintering and the hot extrude.The tensile strength of this coating Gr/Mg matrix material is about 130MPa, and it is about 25% to exceed the tensile strength of magnesium, and the room temperature damping capacity reaches 0.02 high damping.
Embodiment 2
Present embodiment is a wild phase with graphite (Gr) particle of electroless copper (Cu), is the matrix phase with pure magnesium, by obtaining special interfacial layer in the graphite granule Electroless copper, makes the matrix material acquisition intensity of manufacturing and the matched well of damping capacity.Adopting the Gr particle of pure magnesium powder of 40 μ m and 20 μ m is the starting powder material, and the percent by volume of Gr particle is 10%.In Gr particle surface chemical plating weight ratio is 30% Cu coating, and the electroless copper coating evenly covers the graphite granule surface with superfine little particulate state.Then through mixing powder, cold pressing, obtaining even particle distribution, dense structure, interface in conjunction with good matrix material behind sintering and the hot extrude.The tensile strength of this coating Gr/Mg matrix material is about 170MPa, improves the intensity about 60% of magnesium.The room temperature damping capacity approaches 0.014, reaches the high damping level.
Embodiment 3
Present embodiment is a wild phase with graphite (Gr) particle of electroless copper (Cu), is the matrix phase with pure magnesium, by obtaining special interfacial layer in the graphite granule Electroless copper, makes the matrix material acquisition intensity of manufacturing and the matched well of damping capacity.Adopting the Gr particle of pure magnesium powder of 40 μ m and 20 μ m is the starting powder material, and the percent by volume of Gr particle is 30%.In Gr particle surface chemical plating weight ratio is 50% Cu coating, and the electroless copper coating evenly covers the graphite granule surface with superfine little particulate state.Then through mixing powder, cold pressing, obtaining even particle distribution, dense structure, interface in conjunction with good matrix material behind sintering and the hot extrude.The tensile strength of this coating Gr/Mg matrix material is about 210MPa, improves the intensity about 100% of magnesium.The room temperature damping approaches 0.01, and the high temperature damping capacity has surpassed magnesium.Therefore this coating Gr/Mg matrix material can obtain favorable mechanical and damping capacity coupling.
Claims (4)
1, a kind of copper-plated graphite granule reinforced magnesium base composite material is characterized in that, matrix is that the long-pending per-cent 70%-99% of pure magnesium powder or magnesium alloy-powder gets with the volume percent that contains chemical plating copper layer graphite (Gr) particle 1%-30% is mixed.
2, copper-plated graphite granule reinforced magnesium base composite material according to claim 1, it is characterized in that, described chemical plating copper layer is in the sedimentary layer of copper coating of graphite surface by electroless copper, the weight percent of copper accounts for and contains 10%～50% of chemical plating copper layer graphite granule gross weight, and the weight percent of graphite granule is 50%～90%.
According to claim 1 or 2 described copper-plated graphite granule reinforced magnesium base composite materials, it is characterized in that 3, described pure magnesium powder or magnesium alloy-powder are the matrix phase.
According to claim 1 or 2 described copper-plated graphite granule reinforced magnesium base composite materials, it is characterized in that 4, described electroless copper graphite granule is a wild phase.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100247927A CN1318625C (en) | 2005-03-31 | 2005-03-31 | Copper-plated graphite granule reinforced magnesium base composite material |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100247927A CN1318625C (en) | 2005-03-31 | 2005-03-31 | Copper-plated graphite granule reinforced magnesium base composite material |
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| CN1676640A true CN1676640A (en) | 2005-10-05 |
| CN1318625C CN1318625C (en) | 2007-05-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586704A (en) * | 2012-03-23 | 2012-07-18 | 北京科技大学 | High thermal conductivity graphite whisker/copper composite and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1785806C (en) * | 1989-08-04 | 1993-01-07 | Институт механики металлополимерных систем АН БССР | Copper-base powdered composite material |
| CN100408714C (en) * | 2003-03-04 | 2008-08-06 | 吉林大学 | Mixing-reinforced magnesium-base self-lubricating composite material and preparing method |
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2005
- 2005-03-31 CN CNB2005100247927A patent/CN1318625C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586704A (en) * | 2012-03-23 | 2012-07-18 | 北京科技大学 | High thermal conductivity graphite whisker/copper composite and preparation method thereof |
| CN102586704B (en) * | 2012-03-23 | 2013-08-07 | 北京科技大学 | Preparation method of high thermal conductivity graphite whisker/copper composite |
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| CN1318625C (en) | 2007-05-30 |
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