CN106048324A

CN106048324A - Carbon nano tube reinforced aluminum-magnesium composite alloy material for automobile electronic packaging and preparation method of alloy material

Info

Publication number: CN106048324A
Application number: CN201610550312.9A
Authority: CN
Inventors: 王进
Original assignee: Anhui King-Auto Electronic Technology Co Ltd
Current assignee: Anhui King-Auto Electronic Technology Co Ltd
Priority date: 2016-07-13
Filing date: 2016-07-13
Publication date: 2016-10-26

Abstract

The invention discloses a carbon nano tube reinforced aluminum-magnesium composite alloy material for automobile electronic packaging. The carbon nano tube reinforced aluminum-magnesium composite alloy material for the automobile electronic packaging is produced by the following raw materials, in parts by weight, 5-8% of magnesium, 2-3% of nickel, 2-3% of copper, 0.1-0.5% of manganese, 30-50% of carbon nano tube sol, 1-2% of pore-forming agent and 0.5-1% of absolute ethyl alcohol, with the balance being aluminum.

Description

A kind of automotive electronics encapsulation CNT strengthens magnalium composite alloy material and system thereof Preparation Method

Technical field

The present invention relates to electronic package material technical field, particularly relate to a kind of automotive electronics encapsulation CNT and strengthen Magnalium composite alloy material and preparation method thereof.

Background technology

Automotive electronics is the general name of electronic control device for vehicle and vehicular automotive electronic device, and automotive electronics is in automotive engineering In occupy vital position, be exploitation new model, improve the most important technical measures of automotive performance.Owing to automotive interior is deposited In the adverse circumstances factor such as extreme operating temperature range, strong mechanical vibration and spot be more, it is to be ensured that automotive electronics Properties of product are interference-free, it is necessary to carry out the encapsulation work of product, the encapsulating material chosen with realize industry lower cost, The technology trends such as higher function, higher reliability.

Intensity that preferably electronic package material thermal coefficient of expansion to be possessed heat conduction low, high, air-tightness are good, enough and just Spending, be easy to the advantage such as machine-shaping and welding and lightweight light weight, the most conventional a few class wrapper materials mainly have Plastic Package Several big class of material, ceramic packaging material, Materials for Metal Packaging and metal-base composites, the wherein encapsulation of metal-based compound electronics Material has the advantages such as intensity is high, heat conductivity is good becomes the focus of industry research, especially aluminium based metal material, its lightweight excellent Point is extensively favored at automotive field, and the combination property improving aluminum-based packaging material is also study hotspot." vacuum heating-press sintering legal system Standby diamond/Al-Cu based composites " to utilize the mode of vacuum heating-press sintering to improve diamond bad instead with the interface of aluminum for a literary composition Should, it being simultaneously introduced Cu powder and improve performance, this method uses micron-sized diamond powder body, although obtain high heat conductance Composite, but the intensity of alloy material, plasticity reduce the most to a certain extent, range is limited, nano grade inorganic Material has prominent advantage in terms of improving alloy property, but the dispersibility that nanometer materials are in the alloy is the most not to the utmost such as people Meaning.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of automotive electronics encapsulation CNT increases Strong magnalium composite alloy material and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of automotive electronics encapsulation CNT strengthens magnalium composite alloy material, and this alloy material is former by following weight portion Material is made: magnesium 5-8%, nickel 2-3%, copper 2-3%, manganese 0.1-0.5%, carbon nanotube sol 30-50%, pore creating material 1-2%, dehydrated alcohol 0.5-1, surplus are aluminum.

Described carbon nanotube sol is formulated by following methods: Dodecyl trimethyl ammonium chloride puts into anhydrous second In alcohol, stirring puts into CNT, sonic oscillation dispersion 5-10h to it after being completely dissolved, to obtain final product；Wherein CNT, anhydrous Ethanol, the weight ratio of Dodecyl trimethyl ammonium chloride three are 1:5:0.1.

Described pore creating material is the one in sodium chloride, sodium carbonate, spherical carbamide.

Described a kind of automotive electronics encapsulation CNT strengthen the preparation method of magnalium composite alloy material include with Lower step:

(1) first by aluminum, magnesium, nickel, copper, manganese, pore creating material, dehydrated alcohol mixing, with 400-500 turn/rotating speed of min mixes powder 5- 10min, gained mixed material obtains green compact through compacting densification, is put into by green compact in mould hot under vacuum subsequently Pressure sinter molding, sintering process is: system is warming up to 450-500 DEG C with the programming rate of 15-20 DEG C/min, reaches in temperature Pressurizeing when 400 DEG C, pressure is 50-60MPa, and heat preservation sintering 30-40min naturally cools to release after room temperature, products obtained therefrom subsequently Put in water and be dried after dissolution pore creating material, obtain Al-Mg alloy foam prefabricated component standby；

(2) the Al-Mg alloy foam prefabricated component of step (1) gained is put in mould, be subsequently added carbon nanotube sol ,- Oozing long-pending 40-60min under 0.01--0.05MPa, process recovers normal pressure after terminating, and takes out prefabricated component, dry in 80-100 DEG C of baking oven Dry process 2-3h, is placed again into prefabricated component in mould subsequently, 700-750 DEG C, again sinter 20-under 20-30MPa pressure 30min, release of finally lowering the temperature, i.e. obtain described encapsulation alloy material after being cooled to room temperature.

The invention have the advantage that

(1) encapsulating material of the present invention is using almag as base material, and blends the raw materials such as nickel, copper, manganese wherein, it is thus achieved that tool The alloy material of excellent comprehensive mechanical property, this alloy material is had to have prominent elevated temperature strength and Wear-resistant corrosion-resistant performance, In automobile component field, there is prominent application advantage.

(2) alloy powder is first processed into Al-Mg alloy foam prefabricated component in technique by the present invention, and by CNT with The form vacuum of colloidal sol is oozed and is amassed in alloy components, then prepares finished product after double sintering, and this technological process improves carbon and receives The phenomenon that mitron is easily reunited in alloy material so that it is high degree of dispersion, reaches efficient reinforced effects, further improves conjunction simultaneously The internal structure of gold copper-base alloy, it is thus achieved that there is high heat conduction, lightweight, sqouynd absorption lowering noise, the alloy material of low-thermal-expansion rate, at electronic device Encapsulation aspect application prospect is good, lays a good foundation for manufacturing high performance automobile electronic system.

Detailed description of the invention

A kind of automotive electronics encapsulation CNT strengthens magnalium composite alloy material, and this alloy material is by following weight portion Raw material make: magnesium 5%, nickel 2%, copper 2%, manganese 0.1%, carbon nanotube sol 30%, pore creating material 1%, dehydrated alcohol 0.5, surplus are Aluminum.

Wherein carbon nanotube sol is formulated by following methods: Dodecyl trimethyl ammonium chloride is put into dehydrated alcohol In, stirring puts into CNT, sonic oscillation dispersion 5h to it after being completely dissolved, to obtain final product；Wherein CNT, dehydrated alcohol, The weight ratio of Dodecyl trimethyl ammonium chloride three is 1:5:0.1.

The pore creating material used is spherical carbamide.

The preparation method of this alloy material comprises the following steps:

(1) first by aluminum, magnesium, nickel, copper, manganese, pore creating material, dehydrated alcohol mixing, powder 5min, gained are mixed with the rotating speed of 400 turns/min Mixed material obtains green compact through compacting densification, green compact is put in mould hot pressed sintering subsequently under vacuum and becomes Type, sintering process is: system is warming up to 450 DEG C with the programming rate of 15 DEG C/min, pressurizes when temperature reaches 400 DEG C, pressure For 50MPa, heat preservation sintering 30min, naturally cooling to release after room temperature subsequently, products obtained therefrom is put in water dry after dissolution pore creating material Dry, obtain Al-Mg alloy foam prefabricated component standby；

(2) the Al-Mg alloy foam prefabricated component of step (1) gained is put in mould, be subsequently added carbon nanotube sol ,- Ooze long-pending 60min under 0.01MPa, process terminate after recover normal pressure, take out prefabricated component, dried 3h in 80 DEG C of baking ovens, subsequently Prefabricated component is placed again in mould, 700 DEG C, again sinter 20min under 30MPa pressure, release of finally lowering the temperature, be cooled to room Described encapsulation alloy material is i.e. obtained after temperature.

Taking obtained material and prepare standard specimen, carry out performance test according to relevant criterion, test result is:

Density: 2.50g/cm³；Bending strength: 72MPa；Thermal conductivity: 238W/m.k；Thermal coefficient of expansion: 2.34 × 10^-6m/k；It is No solderable: to be.

Claims

1. automotive electronics encapsulation CNT strengthens magnalium composite alloy material, it is characterised in that this alloy material by The raw material of following weight portion is made: magnesium 5-8%, nickel 2-3%, copper 2-3%, manganese 0.1-0.5%, carbon nanotube sol 30-50%, pore-creating Agent 1-2%, dehydrated alcohol 0.5-1, surplus are aluminum.

2. a kind of automotive electronics encapsulation CNT as claimed in claim 1 strengthens magnalium composite alloy material, its feature Being, described carbon nanotube sol is formulated by following methods: Dodecyl trimethyl ammonium chloride is put into dehydrated alcohol In, stirring puts into CNT, sonic oscillation dispersion 5-10h to it after being completely dissolved, to obtain final product；Wherein CNT, anhydrous second Alcohol, the weight ratio of Dodecyl trimethyl ammonium chloride three are 1:5:0.1.

3. a kind of automotive electronics encapsulation CNT as claimed in claim 1 strengthens magnalium composite alloy material, its feature Being, described pore creating material is the one in sodium chloride, sodium carbonate, spherical carbamide.

A kind of automotive electronics encapsulation CNT the most as claimed in claim 1 strengthens the preparation side of magnalium composite alloy material Method, it is characterised in that described preparation method comprises the following steps: