CN107385262A - It is a kind of to prepare the method with high-volume fractional diamond/aluminum composite material parts - Google Patents
It is a kind of to prepare the method with high-volume fractional diamond/aluminum composite material parts Download PDFInfo
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- CN107385262A CN107385262A CN201710450675.XA CN201710450675A CN107385262A CN 107385262 A CN107385262 A CN 107385262A CN 201710450675 A CN201710450675 A CN 201710450675A CN 107385262 A CN107385262 A CN 107385262A
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- Prior art keywords
- diamond
- binding agent
- powder
- composite material
- material parts
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1005—Pretreatment of the non-metallic additives
- C22C1/1015—Pretreatment of the non-metallic additives by preparing or treating a non-metallic additive preform
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
- C22C2026/006—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes with additional metal compounds being carbides
Abstract
The method with high-volume fractional diamond/aluminum composite material parts is prepared the invention provides a kind of, a kind of compound binding agent is mixed with out using binding agent and alloy element Ti powder and is kneaded with diamond, then the technique being combined by powder injection forming vacuum pressureless infiltration technology can prepare the high high-volume fractional Diamond/Al composites of even tissue, consistency.Ti powder wherein in compound binding agent adheres completely to diamond particle surfaces during vacuum degreasing, and react to form TiC layer with diamond surface in high-temperature sintering process, effectively completely cut off aluminium liquid during subsequent infiltration to contact with the direct of diamond surface, not only increase the utilization rate of Ti powder and avoid reductions of the excessive Ti to aluminum substrate heat conductivility, high-volume fractional diamond/aluminum composite material parts can also be directly prepared, the Problems in forming for solving high-volume fractional Diamond/Al composite material parts.
Description
Technical field
The invention belongs to the nearly end form forming technique of metal-based composite parts, in particular, provide one kind and prepare tool
There is the method for high-volume fractional diamond particles enhancing aluminium base (Diamond/Al) composite material parts
Background technology
The characteristics of thermal management materials are due to its high heat conduction, the heat in high-temperature region can be transferred to rapidly low-temperature space
Domain, reach the purpose for coordinating the temperature difference between high power device and system environments.Meanwhile by the high-efficiency heat conduction of thermal management materials,
Its mismatch problem with chip material thermal coefficient of expansion can be improved.Wherein, granule reinforced copper base composite material is heat management
Most study, a kind of most widely used composite in Material Field.High-volume fractional (>50vol%) Diamond/Al is compound
Material excellent dimensional stability, can match because it has excellent physical and mechanical properties with semiconductor chips such as Si, GaAs
Low linear expansion coefficient, the thermal conductivity far above most composites, it has also become one of ideal heat management, navigating
There is tempting application background in the field such as empty, space flight and national defence, and therefore, the research of the material in recent years is always investigation of materials neck
The one big focus in domain.At present, preparing the more ripe method of high-volume fractional Diamond/Al composites mainly has powder metallurgy
Method and diamond preform-Al liquid infiltration methods.Traditional powder metallurgic method is using simply mixed powder-step of swaging-sintering three
Technique, can neatly select the type of matrix alloy composition and reinforcement, performance can scope of design it is larger.But this method is given birth to
It is only 55% or so to produce Diamond/Al maximum volume fractions, and low production efficiency, and production cost is high.Diamond preform
Base-Al liquid infiltration method can prepare the composite (up to 70%) of high-volume fractional, and this method is by certain proportion first
Diadust and binder (such as paraffin, water) by powder metallurgy be molded technology prepare diamond preform, so
Binder is removed and carries out pre-sintering afterwards and prepares the diamond framework with certain porosity, finally penetrates into Al liquations
In the hole of diamond framework, so as to prepare the Diamond/Al composites of high-volume fractional.Because this method uses powder
The metallurgical mould pressing technology in end prepares diamond preform, so shaping base Density inhomogeneity, the complex-shaped degree of part also by
To very big limitation.Even if Al liquid also is difficult to reach complete infiltration using various forms of osmosis technologies, one is often left
Quantitative stomata, this is fatal weakness for electronic package material.In addition, the Diamond/Al of high-volume fractional is answered in matrix
The machining of condensation material is extremely difficult, turns into the bottleneck of the material practical application.Simultaneously as it can be reacted between diamond and Al
Generate deliquescent Al4C3, it usually needs alloying element is added in alloy substrate and forms carbide in diamond surface to subtract
Few Al4C3 generation, diamond surface reaction shape is only diffused on a small quantity because the alloying element is evenly distributed in aluminum substrate
Into carbide lamella, not only reduce the utilization rate of alloy element and illeffects is risen to the heat conductivility of aluminum substrate.Using
Binding agent and alloy element Ti powder are mixed with out a kind of compound binding agent and are kneaded with diamond, then by powder injection into
The technique that shape-vacuum pressureless infiltration technology is combined can prepare the high high-volume fractional of even tissue, consistency
Diamond/Al composites.Ti powder wherein in compound binding agent adheres completely to diamond during vacuum degreasing
Grain surface, and react to form TiC layer with diamond surface in high-temperature sintering process, effectively completely cut off during subsequent infiltration
Aluminium liquid directly contacts with diamond surface.Not only increase the utilization rate of Ti powder and avoid excessive Ti and aluminum substrate is led
The reduction of hot property.In addition, power injection molding is a kind of near-net-shape technique, therefore it can directly prepare high volume
Fraction diamond/aluminum composite material parts, so as to thoroughly solve high-volume fractional Diamond/Al composite material parts into
Shape problem so that high-volume fractional Diamond/Al composite material parts can inexpensive continuous production.
The content of the invention
It is an object of the invention to provide one kind to prepare with high-volume fractional diamond particles reinforced aluminum matrix composites
The method of part, it inexpensive can directly prepare the high-performance Diamond/Al with net shape and higher dimensional precision and answer
Condensation material part.
The present invention is by the way that binding agent is mixed to prepare a kind of compound binding agent, and by diamond dust with being matched somebody with somebody with Ti powder
The binding agent of system according to certain ratio on kneading machine, after granulation on injection machine injection moulding, obtain required shape
Diamond preform, the then degreasing in vacuum degreasing stove, remove binding agent after Ti powder be attached to diamond surface, enter one
Step rise temperature carries out pre-sintering, makes the Ti powder for being attached to diamond surface react to form TiC layer with diamond, the tool that will be obtained
Copper liquid is penetrated into Buddha's warrior attendant by the diamond framework for having TiC coating by vacuum pressureless infiltration technology by the capillarity of hole
In stone skeleton, so as to obtain the diamond/aluminum composite material parts with high-volume fractional, i.e., using powder injection forming-nothing
Infiltration process is pressed to prepare the diamond/aluminum composite material parts with high-volume fractional.
Concrete technology step is：
Ti powder and the binding agent prepared are mixed with compound binding agent, and with 100 μm of diamond dusts according to certain
Ratio on kneading machine in 110 DEG C~130 DEG C be kneaded 1.5~2 hours, powder loading be 50~70vol.%, pelletize
The injection moulding on injection machine afterwards, obtain the diamond preform of required shape；
Then the degreasing in vacuum degreasing stove, binding agent and further warm to 950~1050 DEG C progress pre-burnings of rise are removed
Knot, obtains the diamond framework with TiC coating with certain porosity and intensity；
3) aluminium block for accounting for the volume % of part 30~50 is placed in above diamond framework to be put into together in infiltration in vacuum stove and risen
Pressureless infiltration is carried out after warm to 1100~1200 DEG C, 1~4 hour is incubated, naturally cools to room temperature, as composite zero
Part.
The binding agent that wherein step 1) is prepared is heteropolymer constituent element paraffinic base (PW) binding agent, with high density polyethylene (HDPE)
(HDPE), ethene-vinyl acetate resin copolymer (EVA) is used as plasticizer, with stearic acid (SA) for surfactant, each constituent element
Percentage by weight is PW：HDPE：EVA：SA=(70~80)：(10~15)：(5~10)：(0~5).Injected after feeding granulation
Be molded on forming machine, on injection machine forming temperature be 140~160 DEG C, pressure be 100~120MPa, pre-sintering temperature
For 1000~1150 DEG C.The granularity of Ti powder is 38 μm, and the ratio with binding agent is 1~5wt.%.
Present invention process flow is as shown in Figure 1.
A kind of compound binding agent is mixed with out using binding agent and alloy element Ti powder and is kneaded with diamond, then is led to
The high high body of even tissue, consistency can be prepared by crossing the technique that powder injection forming-vacuum pressureless infiltration technology is combined
Fraction Diamond/Al composites.Ti powder wherein in compound binding agent adheres completely to gold during vacuum degreasing
Hard rock particle surface, and react to form TiC layer with diamond surface in high-temperature sintering process, have during subsequent infiltration
Effect has completely cut off aluminium liquid and contacted with the direct of diamond surface.Not only increase the utilization rate of Ti powder and avoid excessive Ti to aluminium
The reduction of matrix heat conductivility.In addition, power injection molding is a kind of near-net-shape technique, therefore can directly prepare
High-volume fractional diamond/aluminum composite material parts, the volume fraction of diamond, Buddha's warrior attendant can be flexibly adjusted using this technology
Distribution of the stone particle in Copper substrate is also very uniform, during degreasing and pre-sintering, by adjusting sintering temperature so that viscous
The knot agent all perforates of hole left after being removed, can so ensure that copper liquid is fully filled out in the presence of capillary force
It is charged in hole, therefore prepared composite material parts consistency is very high, close to solid density.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
The present invention is described further with reference to some embodiments.Specific embodiment is further specifically
The bright present invention, non-limiting protection scope of the present invention.
Embodiment 1：Prepare the Diamond/Al composite material parts that diamond volume fraction is 70%
Step 1：Heteropolymer constituent element paraffin based binder is chosen, its each constituent element percentage by weight is PW：HDPE：EVA：SA
=79：10：6：5.Mixing 1.5 is small at a temperature of 130 DEG C on kneading machine for addition 1wt.% 38 μm of Ti powder in the binding agent
100 μm of Shi Houyu Diamond powder is kneaded 2 hours on kneading machine at a temperature of 110 DEG C, and diamond dust useful load is
70vol.%, injection moulding, injection temperature are 150 DEG C in injector after granulation, injection pressure 105MPa.By gained in advance into
Shape base dissolves degreasing in trichloro ethylene first, and solution temperature is 40 DEG C, and subsequent preform is warming up in vacuum degreasing stove
200 DEG C are incubated 1 hour, then are warming up to 500 DEG C and are incubated 2 hours to remove binding agent completely.
Step 2：Preform after degreasing is continuously heating to 950 DEG C, and is incubated 2 hours progress pre-sinterings, is obtained
Porous diamond framework with TiC coating.
Step 3：The aluminium block for accounting for part 30vol.% is placed in above diamond framework and is put into vacuum tungsten filament infiltration stove together
In be warming up to 1100 DEG C and be incubated 4 hours, produce Diamond/Al composite material parts.
Embodiment 2：Prepare the Diamond/Al composite material parts that diamond volume fraction is 60%
Step 1：Heteropolymer constituent element paraffin based binder is chosen, its each constituent element percentage by weight is PW：HDPE：EVA：=
75：15：10.After addition 1wt.% 38 μm of Ti powder are kneaded 1.5 hours on kneading machine at a temperature of 130 DEG C in the binding agent
It is kneaded 2 hours at a temperature of 110 DEG C on kneading machine with 100 μm of Diamond powder, diamond dust useful load is
60vol.%, injection moulding, injection temperature are 150 DEG C in injector after granulation, injection pressure 110MPa.By gained in advance into
Shape base dissolves degreasing in trichloro ethylene first, and solution temperature is 40 DEG C, and subsequent preform is warming up in vacuum degreasing stove
200 DEG C are incubated 1 hour, then are warming up to 500 DEG C and are incubated 2 hours to remove binding agent completely.
Step 2：Preform after degreasing is continuously heating to 1000 DEG C, and is incubated 2 hours progress pre-sinterings, is obtained
With the porous diamond framework of TiC coating.
Step 3：The aluminium block for accounting for part 40vol.% is placed in above diamond framework and is put into together with vacuum tungsten filament infiltration
1200 DEG C are warming up in stove and is incubated 2 hours, produces Diamond/Al composite material parts.
Embodiment 3：Prepare the Diamond/Al composite material parts that diamond volume fraction is 50%
Step 1：Heteropolymer constituent element paraffin based binder is chosen, its each constituent element percentage by weight is PW：HDPE：EVA：SA
=72：15：10：3.Mixing 1.5 is small at a temperature of 130 DEG C on kneading machine for addition 1wt.% 38 μm of Ti powder in the binding agent
100 μm of Shi Houyu Diamond powder is kneaded 1.5 hours on kneading machine at a temperature of 130 DEG C, and diamond dust useful load is
50vol.%, injection moulding, injection temperature are 160 DEG C in injector after granulation, injection pressure 120MPa.By gained in advance into
Shape base dissolves degreasing in trichloro ethylene first, and solution temperature is 40 DEG C, and subsequent preform is warming up in vacuum degreasing stove
200 DEG C are incubated 1 hour, then are warming up to 500 DEG C and are incubated 2 hours to remove binding agent completely.
Step 2：Preform after degreasing is continuously heating to 1050 DEG C, and is incubated 2 hours progress pre-sinterings, is obtained
With the porous diamond framework of TiC coating.
Step 3：The aluminium block for accounting for part 50.vol% is placed in above diamond framework and is put into together with vacuum tungsten filament infiltration
1200 DEG C are warming up in stove and is incubated 2 hours, produces Diamond/Al composite material parts.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, it is included within the scope of the present invention.
Claims (3)
1. a kind of prepare the method with high-volume fractional diamond/aluminum composite material parts, it is characterised in that：By that will bond
Agent is mixed with Ti powder to prepare a kind of compound binding agent, and by diamond dust and the binding agent prepared according to certain ratio
On kneading machine, after granulation on injection machine injection moulding, obtain needed for shape diamond preform, then true
Degreasing in empty debinding furnace, Ti powder is attached to diamond surface after removing binding agent, further raises temperature and carries out pre-sintering, makes attached
The Ti powder in diamond surface is reacted to form TiC layer with diamond, and the obtained diamond framework with TiC coating is passed through
Vacuum pressureless infiltration technology penetrates into copper liquid in diamond framework by the capillarity of hole, there is height so as to obtain
The diamond/aluminum composite material parts of volume fraction, i.e., being prepared using powder injection forming-pressureless infiltration technique has high body
The diamond/aluminum composite material parts of fraction.
2. as claimed in claim 1 prepare the method with high-volume fractional diamond/aluminum composite material parts, its feature exists
It is in concrete technology step：
1) Ti powder and the binding agent prepared are mixed with compound binding agent, and with 100 μm of diamond dusts according to certain
Ratio is kneaded 1.5~2 hours on kneading machine in 110 DEG C~130 DEG C, and powder loading is 50~70vol.%, after granulation
The injection moulding on injection machine, obtain the diamond preform of required shape；
2) and then the degreasing in vacuum degreasing stove, warm to 950~1050 DEG C of removing binding agent and further rise carry out pre-sintering,
Obtain the diamond framework with TiC coating with certain porosity and intensity；
3) aluminium block for accounting for the volume % of part 30~50 is placed in above diamond framework to be put into together in infiltration in vacuum stove and be warming up to
Pressureless infiltration is carried out after 1100~1200 DEG C, 1~4 hour is incubated, naturally cools to room temperature, as composite material parts.
3. according to claim 2 prepare the method with high-volume fractional diamond/copper composite material parts, its feature
It is：Binding agent described in step 1) is heteropolymer constituent element paraffinic base (PW) binding agent, with high density polyethylene (HDPE) (HDPE), second
Alkene-vinyl acetate resin copolymer (EVA) is used as plasticizer, with stearic acid (SA) for surfactant, each constituent element percentage by weight
For PW：HDPE：EVA：SA=(70~80)：(10~15)：(5~10)：(0~5), feeding granulation after on injection machine into
Type, on injection machine forming temperature be 140~160 DEG C, pressure be 100~120MPa, pre-sintering temperature is 1000~
1150 DEG C, the granularity of Ti powder is 38 μm, and the ratio with binding agent is 1~5wt.%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710450675.XA CN107385262A (en) | 2017-06-15 | 2017-06-15 | It is a kind of to prepare the method with high-volume fractional diamond/aluminum composite material parts |
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| CN201710450675.XA CN107385262A (en) | 2017-06-15 | 2017-06-15 | It is a kind of to prepare the method with high-volume fractional diamond/aluminum composite material parts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408930A (en) * | 2019-07-19 | 2019-11-05 | 佛山市佛晶金属工具制造有限公司 | A kind of diamond and preparation method thereof with intermetallic compound coating layer |
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| CN1644276A (en) * | 2005-01-05 | 2005-07-27 | 北京科技大学 | Method for producing high-volume fractional silicon-carbide particle reinforced aluminium-base composite material member |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110408930A (en) * | 2019-07-19 | 2019-11-05 | 佛山市佛晶金属工具制造有限公司 | A kind of diamond and preparation method thereof with intermetallic compound coating layer |
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Application publication date: 20171124 |