CN105200252A - Novel high-conductivity and high-abrasion-resistance aluminum matrix composite - Google Patents
Novel high-conductivity and high-abrasion-resistance aluminum matrix composite Download PDFInfo
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- CN105200252A CN105200252A CN201410293514.0A CN201410293514A CN105200252A CN 105200252 A CN105200252 A CN 105200252A CN 201410293514 A CN201410293514 A CN 201410293514A CN 105200252 A CN105200252 A CN 105200252A
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Abstract
The invention relates to a novel high-conductivity and high-abrasion-resistance aluminum matrix composite. The favorable conductivity and wear resistance of a Ti2AlC ternary compound are utilized to prepare the novel Ti2AlCp/Al conductive and wear-resistant aluminum matrix composite. A preparation method of the novel high-conductivity and high-abrasion-resistance aluminum matrix composite comprises the following steps: (1) carrying out cold-pressing shaping according to a semi-wet method for preparation of a Ti2AlC reinforcement precast block; (2) placing the precast block into a die for preheating; (3) preparing the aluminum matrix composite through extrusion casting. The preparation method is simple in process and avoids the complex process of binder screening during preparation of the precast block, and the prepared composite is compact in tissue, favorable in conductivity, low in friction coefficient and good in wearing resistance.
Description
Technical field
The present invention relates to a kind of high connductivity high abrasion aluminum matrix composite and preparation method thereof.
Background technology
Aluminum-aluminum alloy is owing to having lower density, excellent anti-corrosion, castability and processing characteristics, also there is the performance of resistance to nuclear radiation, become the metallic substance be most widely used except ferrous materials at present, the important foundation starting material of Economic development, but the intensity of aluminum or aluminum alloy, modulus and high temperature and wear resisting property poor, limit its application development to a certain extent.By introducing reinforcement in aluminum or aluminum alloy matrix, its room temperature and high temperature yield and tensile strength can be improved while maintenance body material toughness, improve the performances such as fatigue strength, Young's modulus, wear resistance, reduce the thermal expansivity of body material, make up the deficiency of Aluminum-aluminum alloy performance to a great extent.
Traditional aluminum matrix composite often adopts SiC, Al
2o
3, Si
3n
4deng particle and whisker as reinforcement, these hard particles or whisker itself have the feature of high-strength wearable, therefore add these hard particles and both can strengthen matrix, can improve again the friction and wear behavior of material.But the conductivity of these reinforcement materials is very poor, reinforcement content makes the conductivity of aluminum matrix composite occur to decline largely compared with Gao Shihui, and matrix material can not have both high connductivity and high antifriction performance.Ti
2alC is a kind of ternary compound crystal with laminate structure, at Ti
2in the crystal unit cell of AlC, closelypacked Ti octahedral layer is separated by Al atomic plane layer, and the bonding force between Ti atom and Al atomic plane is more weak, and this combination and graphite linings interstructural Fan get Hua Li weak bond are in conjunction with closely similar.This special laminate structure makes Ti
2alC had both had high-melting-point and the high thermal stability of stupalith, good oxidation-resistance and low hot expansibility; Again as metal, there is good conduction, thermal conductivity, also there is good self-lubricating property.Ti
2the abrasion resistance properties of AlC is better than B
4c, β-B and β-BN, wearing and tearing absorb merit higher than materials such as SiC, TiC, ZrC, WC, and increase with abrasion cycles cycle, are reduced to SiC, TiC, ZrC, WC, Al under its wear resistance
2o
3deng material.Therefore, compared with other reinforcement materials, add Ti
2alC can either improve the intensity of aluminum substrate, hardness and thermal expansion stability, can obtain excellent conduction and wear resisting property again simultaneously.
Summary of the invention
The present invention is intended to the Ti by selecting conduction and wear resisting property excellence
2alC novel enhanced body particle, solves the deficiency that the electroconductibility of aluminum matrix composite in the past and wear resistance can not have both, thus provides a kind of particle enhanced aluminum-based composite material of novel high connductivity high abrasion.
One is novel leads high electric high abrasion aluminum matrix composite, and its preparation process is as follows:
(1) particle diameter is selected to be the Ti of 1 ~ 15 μm
2alC powder, according to Ti
2alC reinforcement volume content 15 ~ 50% weighs required Ti
2alC powder;
(2) by load weighted Ti
2alC powder adopts semi-wet method coldmoulding to prepare Ti
2alC reinforcement prefabricated section, for preventing breaking in extrusion casting process, is inserted in prefabricated section in steel bushing to play a protective role.
(3) prefabricated section is put into mould and be preheated to 400 ~ 600 DEG C of insulation 1 ~ 2h at heating jacket; Meanwhile, aluminium liquid is heated to 800 DEG C and to be incubated more than 2h stand-by, and poured into by molten aluminum liquid in mould, the 0.5 ~ 5MPa that first pressurizes permeates, then carries out 6 ~ 20MPa pressurize, 1 ~ 15min, and the demoulding obtains Ti
2alC
p/ Al matrix material.
Described matrix material adopts pure Al as matrix.
Outstanding feature of the present invention and beneficial effect are:
1, described composite material preparation process is simple, and cost is low, and the cycle is fast, can control reinforcement content according to actual needs.
2, prepared high connductivity high abrasion aluminum matrix composite good mechanical performance, 40vol%Ti
2alC
pthe room temperature tensile intensity > 260MPa of/Al matrix material, Ti in matrix material
2the self-lubricating property that AlC particle has itself reduces the frictional coefficient of matrix material, and its high conductivity improves the conductivity of matrix material, and therefore the present invention has broad application prospects.
Embodiment
Embodiment 1
20vol%Ti
2alC
pthe preparation of/Al matrix material
Step one selects particle diameter to be the Ti of 1 ~ 15 μm
2alC powder, according to Ti
2alC reinforcement volume content 20% calculates and weighs required Ti
2alC powder and Al powder;
Step 2 is by load weighted Ti
2alC powder adopts semi-wet method coldmoulding to prepare Ti
2alC reinforcement prefabricated section, for preventing breaking in extrusion casting process, is inserted in prefabricated section in steel bushing to play a protective role;
Prefabricated section is put into mould and is preheated to 400 ~ 600 DEG C of insulation 1 ~ 2h at heating jacket by step 3; Meanwhile, aluminium liquid is heated to 800 DEG C and is incubated more than 2h, is poured into by molten aluminum liquid in mould, and the 0.5 ~ 5MPa that first pressurizes permeates, then carries out 6 ~ 20MPa pressurize, 1 ~ 15min, and the demoulding obtains Ti
2alC
p/ Al matrix material.
Embodiment 2
40vol%Ti
2alC
pthe preparation of/Al matrix material
Present embodiment and embodiment one select particle diameter to be the Ti of 1 ~ 15 μm unlike, step one
2alC powder, according to Ti
2alC reinforcement volume content 40% calculates and weighs required Ti
2alC powder.Other are identical with embodiment one.
Table 1 gives room temperature mechanics, the electric property of matrix material of the present invention.
Composite materials property of the present invention is excellent, conduction and wear resisting property very excellent.40vol%Ti
2alC
proom temperature (20 DEG C) specific conductivity of/Al matrix material is 7.10MS/m, apparently higher than the specific conductivity (3.38-4.42MS/m) of the SiC/Al matrix material of high-volume fractional (content 55-65%).The room temperature wear rate of pure Al is 102.9 × 10
-4mm
3/ (Nm); And 20vol%Ti
2alC
pthe Volume erosion rate of/Al matrix material is 15.5 × 10
-4mm
3/ (N.m), reduces 85% compared with pure Al, only has 1/7 of pure Al; And 40vol%Ti
2alC
pthe Volume erosion rate of/Al matrix material reaches 8.16 × 10 especially
-4mm
3/ (Nm), reduces 92% compared with pure Al, is only 1/13 of pure Al.20vol%Ti
2alC
pthe stable state frictional coefficient of/Al matrix material is about 0.4, and 40vol%Ti
2alC
pthe stable state frictional coefficient of/Al matrix material is about 0.3, all low than pure Al.
Table 1
Claims (5)
1. a Novel high-conductivity high abrasion aluminum matrix composite, is characterized in that comprising the following steps:
(1) particle diameter is selected to be the Ti of 1 ~ 15 μm
2alC powder, according to Ti
2alC reinforcement volume content 15 ~ 50% weighs required Ti
2alC powder;
(2) by load weighted Ti
2alC powder adopts semi-wet method coldmoulding to be prepared into Ti
2alC reinforcement prefabricated section, for preventing breaking in extrusion casting process, is inserted in prefabricated section in steel bushing to play a protective role;
(3) prefabricated section is put into mould and be preheated to 400 ~ 600 DEG C of insulation 1 ~ 2h at heating jacket; Meanwhile, aluminium liquid is heated to 800 DEG C and insulation is extremely melted completely, and poured into by molten aluminum liquid in mould, the 0.5 ~ 5MPa that first pressurizes permeates, then carries out 6 ~ 20MPa pressurize, 1 ~ 15min, and the demoulding obtains Ti
2alC
p/ Al matrix material.
2. the wear-resisting aluminum matrix composite of one conduction according to claim 1, is characterized in that:
Ti
2the particle diameter of AlC reinforcement particle is 1 ~ 15 μm, volume content 15 ~ 50%.
3. the wear-resisting aluminum matrix composite of one conduction according to claim 1, is characterized in that:
Ti
2alC reinforcement prefabricated section adopts semi-wet method preparation.
4. the wear-resisting aluminum matrix composite of one conduction according to claim 1, is characterized in that:
Ti
2the preheating temperature of AlC reinforcement prefabricated section is 400 ~ 600 DEG C, insulation 1 ~ 2h.
5. the wear-resisting aluminum matrix composite of one conduction according to claim 1, is characterized in that:
Ti
2the preparation of AlC/Al matrix material adopts extrusion casting method, and adopts two-step approach to pressurize, and the 0.5 ~ 5MPa that first pressurizes permeates, then carries out 6 ~ 20MPa pressurize, 1 ~ 15min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293514.0A CN105200252A (en) | 2014-06-24 | 2014-06-24 | Novel high-conductivity and high-abrasion-resistance aluminum matrix composite |
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|---|---|---|---|
| CN201410293514.0A CN105200252A (en) | 2014-06-24 | 2014-06-24 | Novel high-conductivity and high-abrasion-resistance aluminum matrix composite |
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| CN105200252A true CN105200252A (en) | 2015-12-30 |
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| CN201410293514.0A Pending CN105200252A (en) | 2014-06-24 | 2014-06-24 | Novel high-conductivity and high-abrasion-resistance aluminum matrix composite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086500A (en) * | 2016-08-02 | 2016-11-09 | 西安交通大学 | A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional |
Citations (4)
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|---|---|---|---|---|
| CN1482265A (en) * | 2003-07-29 | 2004-03-17 | 哈尔滨工业大学 | Pressure casting method for controllable volume percent SiCp/Al composite material |
| CN101302107A (en) * | 2008-05-28 | 2008-11-12 | 哈尔滨工业大学 | Pressure auxiliary self-spreading titanium aluminum carbon block material and preparation thereof |
| CN103540783A (en) * | 2013-10-29 | 2014-01-29 | 北京交通大学 | Titanium aluminum carbon particle-enhanced zinc-aluminum composite material and pressureless sintering preparation method thereof |
| CN103555982A (en) * | 2013-10-29 | 2014-02-05 | 北京交通大学 | Titanium-aluminum-carbon particle-reinforced zinc-aluminum-based composite material and hot-pressing sintering preparation method thereof |
-
2014
- 2014-06-24 CN CN201410293514.0A patent/CN105200252A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1482265A (en) * | 2003-07-29 | 2004-03-17 | 哈尔滨工业大学 | Pressure casting method for controllable volume percent SiCp/Al composite material |
| CN101302107A (en) * | 2008-05-28 | 2008-11-12 | 哈尔滨工业大学 | Pressure auxiliary self-spreading titanium aluminum carbon block material and preparation thereof |
| CN103540783A (en) * | 2013-10-29 | 2014-01-29 | 北京交通大学 | Titanium aluminum carbon particle-enhanced zinc-aluminum composite material and pressureless sintering preparation method thereof |
| CN103555982A (en) * | 2013-10-29 | 2014-02-05 | 北京交通大学 | Titanium-aluminum-carbon particle-reinforced zinc-aluminum-based composite material and hot-pressing sintering preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张璟伟: "挤压铸造法制备Ti2AlC颗粒增强铝基复合材料的组织及性能研究", 《中国优秀硕士学位论文全文数据库 工程科技1辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086500A (en) * | 2016-08-02 | 2016-11-09 | 西安交通大学 | A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional |
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Effective date of registration: 20170322 Address after: 213025 East Road, Changzhou, Jiangsu Province, No. 133 East Road Applicant after: Jiangsu Hua Wangxin Material Co., Ltd. Address before: 213025 East Road, Qishuyan District, Jiangsu, China, No. 133, No. Applicant before: JIANGSU LANGYI NEW MATERIALS CO., LTD. |
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Application publication date: 20151230 |