CN1616166A - Process for preparing composite metal powder containing aluminium nitride - Google Patents
Process for preparing composite metal powder containing aluminium nitride Download PDFInfo
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- CN1616166A CN1616166A CNA2004100795895A CN200410079589A CN1616166A CN 1616166 A CN1616166 A CN 1616166A CN A2004100795895 A CNA2004100795895 A CN A2004100795895A CN 200410079589 A CN200410079589 A CN 200410079589A CN 1616166 A CN1616166 A CN 1616166A
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Abstract
Aluminum alloy powder and other metal powder or alloy powder of copper, titanium and aluminum as main material and ammonia water or liquid nitrogen as reactant are mechanically alloying treated in ball mill under controlled time, rotation speed, ball/material ratio and other technological conditions, so that the aluminum component in the alloy is nitridized partially or completely and composite metal powder containing aluminum nitride is obtained. The composite metal powder containing aluminum nitride may be used in preparing composite metal base material with reinforced aluminum nitride for use in electric appliance needing heat dissipation.
Description
(1) technical field: metal-base composites scientific domain
(2) background technology: the main means that metal-base composites is strengthened are to introduce second hardening constituent (ceramic phase) to form composite, to satisfy the performance requirement under the different environment for use conditions.Aluminium nitride ceramics material thermal conductivity height (close) with aluminium, nontoxic, material source is extensive, and dielectric constant and mechanical performance and aluminium oxide near etc. advantage, be widely used in the high thermal conductive substrate material.Aluminium nitride is added the metal-base composites that can prepare high thermal conductivity, high strength and hardness in the metal, can be applied in the electric equipment that needs rapid heat dissipation.Preparation method about nitrogen aluminum composite metal powder does not appear in the newspapers.And that the preparation method of known second phase strengthened metal base composite material has is following several:
1. powder metallurgic method: it is that metal powder and wild phase powder are fully mixed that known powder metallurgic method prepares metal-base composites, and mixed-powder prepares metal-base composites through press forming, sintering, repressing and re-sintering, extruding drawing or rolling mill practice again;
2. composite casting: be meant with alloying element or by second hardening constituent and melt with metal or first deposite metal, be added in the melt metal liquid second again, inject mold when the vigorous stirring melt extremely partly solidifies attitude then, make metal-base composites by extruding drawing or rolling mill practice at last;
3. internal oxidation: this method is the alloy powder with two kinds of metals preparations, be placed on the atmospheric condition heating down of certain partial pressure of oxygen, make wherein a kind of metal carry out oxidation and generate the second phase particle, suppress then, means such as sintering, processing prepare the second phase particles reiforced metal-base composition.
4. reaction synthesis method: this method is that alloy powder and the substrate metal oxide powder with two kinds of (or two or more) metals preparations is raw material, through after the compression moulding, under the control preparation process condition, generate a kind of preparation method that metal oxide particle strengthens matrix material.
In the technology of preparing of the known second phase particles reiforced metal-base composition, powder metallurgic method technology more complicated, easily pollute at the powder interface, the interface is in conjunction with poor; Composite casting is air-breathing in the process that stirs easily, causes in the product pore many, and performance descends; Internal oxidation is difficult to control oxidizing atmosphere, when the second phase metal is carried out oxidation, causes the oxidation to parent metal, makes the composite that is obtained not reach estimated performance; Reaction synthesis method has very high requirement to the performance of substrate metal oxide, and general substrate metal oxide is difficult to reach requirement, has limited the extensive use of this method in particles reiforced metal-base composition.
(3) summary of the invention
Purpose of the present invention is not only the deficiency that exists at known technology and a kind of new method of succeeding in developing, and is preparation nitrogen aluminum composite metal powder and a kind of technology of preparing of adopting; This method is with metal powder (comprising copper powder, titanium valve, aluminium powder), or the alloy powder of metal (comprising copper, titanium, aluminium) and aluminium is a raw material, with ammoniacal liquor or liquid nitrogen is reactant, and control the time and the rotating speed of mechanical alloying well, make that all or part of nitrogenize takes place aluminium in the alloy powder, finally obtain nitrogen aluminum composite metal powder.After having prepared this nitrogen aluminum composite metal powder, just can prepare with aluminium nitride and strengthened the compound gold copper-base alloy of Metal Substrate of metal by technologies such as compacting, sintering, processing.The present invention realizes by following technical scheme.
Adopt known powder-making technique to prepare metal dust and aluminium powder (alloyed powder that perhaps directly prepares metal and aluminium) earlier, then with ammoniacal liquor (or liquid nitrogen) as raw material, the time of control mechanical alloying and rotating speed carry out mechanical alloying to be handled, and finally obtains the composite metal powder of nitrogen aluminium.
One, material component, granularity and shared percentage by weight thereof:
1) raw material: metal powder comprises copper powder, titanium valve, aluminium powder and aluminium powder; Or metal comprises the alloy powder of copper, titanium, aluminium and aluminium, and wherein aluminium element accounts for the 0.6-40% of alloy gross weight, and surplus is a metal dust, and raw material can be 100% aluminium powder; Granularity is less than 45 microns;
2) reactant: ammoniacal liquor or liquid nitrogen, addition need add the ammoniacal liquor of 2--5 milliliter with every generation 1 gram aluminium nitride in the raw material or the liquid nitrogen ratio of 1--3 milliliter is determined ammonia concn 25-35 weight %.
Two, material formula: raw material+reactant
Three, mechanical alloying technical conditions: the material for preparing is gone into ball mill and is carried out the mechanical alloying processing
1) mechanical alloying time: 6-30 hour;
2) mechanical alloying rotating speed: 150-300 rev/min;
3) mechanical alloying ball: aluminium oxide ceramics ball or stainless steel ball;
4) ratio of grinding media to material: 1: 5 or 2: 3 or 3: 2.
Compare advantage and the good effect that is had with known technology:
By the high energy mechanical Alloying Treatment, improved the surface-active of aluminium in the powder, and made nitrogen in the ammoniacal liquor react to generate needed aluminium nitride with it.Because reaction is to carry out in the high energy mechanical alloying process, the aluminium surface-active is strong, easily form the aluminium nitride that needs, and the aluminium nitride that generates is inlayed in ma process enters into the higher metal dust of surface-active, form the composite metal powder of metal and aluminium nitride, the metal dust of this greater activity and newly-generated aluminium nitride are under the effect of high energy mechanical alloying, and the surface is fresh, easily form in conjunction with more firm metal and aluminium nitride composite powder.The nitrogen aluminum composite metal powder that is obtained by behind the compacting sintering, can obtain the nitride metal aluminium composite material of higher comprehensive performance again.
In addition, this preparation method, the content of aluminium nitride is finished in the process of mechanical alloying, is easy to adjust, and can prepare the nitride metal aluminium composite material that satisfies the different performance requirement.
(4) specific embodiments:
Embodiment one
By the aluminium powder of 0.7 weight % and the copper powder of 99.3 weight %, and 2ml/g ammoniacal liquor is material; And be that 2: 3, rotating speed are 150 commentaries on classics/min with ratio of grinding media to material, the time is to carry out mechanical alloying under 8 hours the condition to handle, ammonia concn is 35 weight %.
Embodiment two
By aluminium powder and the titanium valve of 80 weight % or the aluminium powder of 100 weight % of 20 weight %, and the 3ml/g liquid nitrogen is a raw material; And be that 1: 5, rotating speed are 280 commentaries on classics/min with ratio of grinding media to material, the time is to carry out mechanical alloying under 30 hours the condition to handle.
Embodiment three
By the copper-aluminium alloy powder of 100 weight % (wherein, aluminium account for weight alloy 40%) or the titanium-aluminium alloy powder (wherein, aluminium account for weight alloy 40%), and 3ml/g ammoniacal liquor is raw material; And be that 3: 2, rotating speed are 200 commentaries on classics/min with ratio of grinding media to material, the time is that 20 hours condition is carried out mechanical alloying and handled, ammonia concn is 25 weight %.
Claims (6)
1, a kind of preparation method of nitrogen aluminum composite metal powder is characterized in that, the prescription of this method is raw material+reactant, and described raw material is metal powder and aluminium powder; Or the alloy powder of metal and aluminium, wherein aluminium element accounts for the 0.6-40% of alloy amount, and surplus is a metal; Powder size is less than 45 microns, and described reactant is ammoniacal liquor or liquid nitrogen, and ammonia concn is 25-35 weight %, and its addition is determined with ammoniacal liquor or 1-3ml liquid nitrogen that every generation 1 gram aluminium nitride in the raw material need add 2-5ml.
2, follow preparation method, it is characterized in that metal powder is copper powder, titanium valve or aluminium powder according to the described nitrogen aluminum composite metal of claim 1 powder.
3, follow preparation method, it is characterized in that the alloy of described metal and aluminium is the alloy of copper, titanium or aluminium and aluminium according to the described nitrogen aluminum composite metal of claim 2 powder.
According to preparation method, it is characterized in that 4, ammonia concn is 25-35 weight % according to the described nitrogen aluminum composite metal of claim 3 powder.
5, a kind of preparation method of nitrogen aluminum composite metal powder, handle carrying out mechanical alloying in each described formula material adding ball mill among the claim 1-4, it is characterized in that, the mechanical alloying time is 6-30 hour, the mechanical alloying rotating speed is 150-300 rev/min, the alloying ball is aluminium oxide ceramics ball or stainless steel ball, and ratio of grinding media to material is 1: 5 or 2: 3 or 3: 2.
6, follow preparation method, it is characterized in that, adopt the high-energy ball milling jar to carry out mechanical alloying and handle according to the described nitrogen aluminum composite metal of claim 5 powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100795895A CN1283400C (en) | 2004-11-30 | 2004-11-30 | Process for preparing composite metal powder containing aluminium nitride |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100795895A CN1283400C (en) | 2004-11-30 | 2004-11-30 | Process for preparing composite metal powder containing aluminium nitride |
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| CN1616166A true CN1616166A (en) | 2005-05-18 |
| CN1283400C CN1283400C (en) | 2006-11-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8784728B2 (en) * | 2006-12-05 | 2014-07-22 | The Boeing Company | Micro-grained, cryogenic-milled copper alloys and process |
| US8795585B2 (en) * | 2006-12-05 | 2014-08-05 | The Boeing Company | Nanophase cryogenic-milled copper alloys and process |
| CN110216292A (en) * | 2019-04-23 | 2019-09-10 | 宿迁正丰科技有限公司 | Utilize solid-state CO2Or liquid argon or liquid nitrogen cooling mechanical crushing prepare purification ultrafine titanium powder technique |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794452A (en) * | 2011-05-24 | 2012-11-28 | 合肥旭阳铝颜料有限公司 | Preparation method of aluminum silver paste |
| CN107740018A (en) * | 2017-10-25 | 2018-02-27 | 宝鸡市金海源钛标准件制品有限公司 | A kind of preparation method of titanium matrix composite |
-
2004
- 2004-11-30 CN CNB2004100795895A patent/CN1283400C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8784728B2 (en) * | 2006-12-05 | 2014-07-22 | The Boeing Company | Micro-grained, cryogenic-milled copper alloys and process |
| US8795585B2 (en) * | 2006-12-05 | 2014-08-05 | The Boeing Company | Nanophase cryogenic-milled copper alloys and process |
| CN110216292A (en) * | 2019-04-23 | 2019-09-10 | 宿迁正丰科技有限公司 | Utilize solid-state CO2Or liquid argon or liquid nitrogen cooling mechanical crushing prepare purification ultrafine titanium powder technique |
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| Publication number | Publication date |
|---|---|
| CN1283400C (en) | 2006-11-08 |
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Granted publication date: 20061108 Termination date: 20091230 |