CN101831564A - Method for preparing TiAl3-einforced aluminum-based composite material by using in-situ reaction - Google Patents
Method for preparing TiAl3-einforced aluminum-based composite material by using in-situ reaction Download PDFInfo
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- CN101831564A CN101831564A CN 201010160011 CN201010160011A CN101831564A CN 101831564 A CN101831564 A CN 101831564A CN 201010160011 CN201010160011 CN 201010160011 CN 201010160011 A CN201010160011 A CN 201010160011A CN 101831564 A CN101831564 A CN 101831564A
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- tial3
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Abstract
The invention discloses a method for preparing a TiAl3-reinforced aluminum-based composite material by using an in-situ reaction. The method is characterized by comprising the following steps of: uniformly mixing and cryolite powder (Na3AlF6) and titanium powder (Ti) according to the mass ratio of 1-1.5:1 and drying; mixing 7075 aluminum alloy and placing into a graphite crucible for heating and melting; adding the mixed powder into a 7075 aluminum alloy melt according to the ratio of 8-12 percent by weight at 850-880DEG C for preserving the temperature for 15-20min; stirring by using a graphite rod for 20-30 min and preserving the temperature for 25-30min; and reducing the temperature of the melt to 740-750DEG C, casting the melt into a graphite model and sampling after cooled. The obtained TiAl3/ aluminum-based composite material tissue has fine crystals and the generated TiAl3-reinforced phase is uniformly distributed and is in a shape of small block; in addition, the invention has the advantages of low process cost, simple process, safety, reliability and convenient operation.
Description
Technical field
The invention belongs to the metallic substance preparation field, particularly the preparation method of aluminum matrix composite.
Background technology
Particle enhanced aluminum-based composite material has specific tenacity, specific rigidity height, high-wearing feature, high many advantages such as vibration damping.TiAl
3Having simultaneously high-melting-point, high rigidity, high Young's modulus and lower-price characteristic again because of it has good thermoelectricity capability, is the ideal wild phase, by numerous scholars are paid close attention to.Ti and the spontaneous chemical reaction that carries out of Al meeting in the particle enhanced aluminum-based composite material of in-situ reaction preparation, equation is: Ti (s)+3Al (l)=TiAl
3(s).The matrix material that reaction in generates has characteristics such as interfacial bonding property is good, pollution-free, Heat stability is good, saving cost, thereby comes into one's own gradually.
Summary of the invention
The purpose of this invention is to provide and a kind ofly prepare TiAl with reaction in
3The method of reinforced aluminum matrix composites.
Preparation method of the present invention is: at first with cryolite powder (Na
3AlF
6) with titanium valve (Ti) by 1～1.5: 1 quality than uniform mixing, oven dry; Plumbago crucible internal heating, fusing are put in the mixing of 7075 aluminium alloys, when 850～880 ℃ of temperature, with above-mentioned mixed powder by 8～12wt.% join be incubated 15～20min in 7075 aluminium alloy melts after, stir 20～30min with graphite rod, be incubated 25～30min again; Melt temperature is reduced to 740～750 ℃, pour in the graphite model, after cooling sampling.
The TiAl that the present invention obtains
3Crystal grain is tiny in/7075 aluminum matrix composite tissues, and the TiAl that generates
3Wild phase is evenly distributed, and is the dice shape.This technology cost is low, simple; Safe and reliable; Easy to operate.
Description of drawings
The TiAl of Fig. 1 for preparing under the one embodiment of the invention condition
3/ 7075 aluminum matrix composite microstructures.
Fig. 2 is the TiAl of Fig. 1 after amplifying
3In/7075 aluminum matrix composites
Distribution situation.
Embodiment
The present invention will be described further by following examples.
Embodiment 1.
At first with cryolite powder (Na
3AlF
6) with titanium valve (Ti) by 1～1 quality than uniform mixing, oven dry; 7075 aluminium alloys are mixed put into plumbago crucible internal heating, fusing, when 850 ℃ of temperature, above-mentioned mixed powder is joined in 7075 aluminium alloy melts behind the insulation 15min by 8wt.%, stir 20min, be incubated 25min again with graphite rod; Melt temperature is reduced to 740 ℃, pour in the graphite model, after cooling sampling.
Embodiment 2.
At first with cryolite powder (Na
3AlF
6) with titanium valve (Ti) by 1～1 quality than uniform mixing, oven dry; 7075 aluminium alloys are mixed put into plumbago crucible internal heating, fusing, when 850 ℃ of temperature, above-mentioned mixed powder is joined in 7075 aluminium alloy melts behind the insulation 15min by 8wt.%, stir 30min, be incubated 25min again with graphite rod; Melt temperature is reduced to 740 ℃, pour in the graphite model, after cooling sampling.
Embodiment 3.
At first with cryolite powder (Na
3AlF
6) with titanium valve (Ti) by 1.2: 1 quality than uniform mixing, oven dry; 7075 aluminium alloys are mixed put into plumbago crucible internal heating, fusing, when 880 ℃ of temperature, above-mentioned mixed powder is joined in 7075 aluminium alloy melts behind the insulation 20min by 12wt.%, stir 30min, be incubated 30min again with graphite rod; Melt temperature is reduced to 750 ℃, pour in the graphite model, after cooling sampling.
Embodiment 4.
At first with cryolite powder (Na
3AlF
6) with titanium valve (Ti) by 1.5: 1 quality than uniform mixing, oven dry; 7075 aluminium alloys are mixed put into plumbago crucible internal heating, fusing, when 850 ℃ of temperature, above-mentioned mixed powder is joined in 7075 aluminium alloy melts behind the insulation 20min by 12wt.%, stir 30min, be incubated 25min again with graphite rod; Melt temperature is reduced to 740 ℃, pour in the graphite model, after cooling sampling.
Accompanying drawing 1 obtains TiAl under embodiment 3 conditions
3/ 7075 aluminum matrix composite tissue, by accompanying drawing 1 as seen, the TiAl that obtains
3/ 7075 aluminum matrix composite tissue does not have tangible dendritic crystal state to occur, and the substitute is a large amount of rosiness, spheric grain.TiAl
3Crystalline structure and the mismatch of the crystalline structure of aluminium in heterogeneous forming core claimed range, increased nucleation rate so greatly, thereby made the tissue of matrix material obtain tangible refinement.
Accompanying drawing 2 is the organization chart of accompanying drawing after amplifying, among the figure as seen, by original position generation TiAl
3/ 7075 aluminum matrix composites, reaction has generated a series of particulate state and dice shape newborn substance.The particulate material of Sheng Chenging mainly is distributed in crystals as we can see from the figure, and granular size is about 5 μ m, and the dice shape novel substance of generation does not have specific position.
Claims (1)
1. one kind prepares TiAl with reaction in
3The method of reinforced aluminum matrix composites is characterized in that at first with cryolite powder (Na
3AlF
6) with titanium valve (Ti) by 1～1.5: 1 quality than uniform mixing, oven dry; Plumbago crucible internal heating, fusing are put in the mixing of 7075 aluminium alloys, when 850～880 ℃ of temperature, with above-mentioned mixed powder by 8～12wt.% join be incubated 15～20min in 7075 aluminium alloy melts after, stir 20～30min with graphite rod, be incubated 25～30min again; Melt temperature is reduced to 740～750 ℃, pour in the graphite model, after cooling sampling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101600118A CN101831564B (en) | 2010-04-29 | 2010-04-29 | Method for preparing TiAl3-einforced aluminum-based composite material by using in-situ reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101600118A CN101831564B (en) | 2010-04-29 | 2010-04-29 | Method for preparing TiAl3-einforced aluminum-based composite material by using in-situ reaction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101831564A true CN101831564A (en) | 2010-09-15 |
| CN101831564B CN101831564B (en) | 2011-12-21 |
Family
ID=42715782
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101600118A Expired - Fee Related CN101831564B (en) | 2010-04-29 | 2010-04-29 | Method for preparing TiAl3-einforced aluminum-based composite material by using in-situ reaction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643087A (en) * | 2013-11-11 | 2014-03-19 | 江苏大学 | Method for preparing Al-Ti-B-O aluminum-based in-situ composite material |
| CN104962772A (en) * | 2015-06-02 | 2015-10-07 | 南昌大学 | Method for preparing in-situ Al3Ti particle-reinforced Al-Si-Cu composite material |
-
2010
- 2010-04-29 CN CN2010101600118A patent/CN101831564B/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| 《中国有色金属学报》 20001031 赵玉厚等 原位Al3Ti粒子增强ZL101铝基复合材料 214-217 1 第10卷, 2 * |
| 《西安工业学院学报》 20050430 田龙等 原位AlN和Al3Ti粒子增强ZL101铝基复合材料 153-157 1 第25卷, 第2期 2 * |
| 《锻造技术》 20070331 阴瑜娟等 原位生成Al3Ti和TiB2增强铝基复合材料的研究 344-346 1 第28卷, 第3期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643087A (en) * | 2013-11-11 | 2014-03-19 | 江苏大学 | Method for preparing Al-Ti-B-O aluminum-based in-situ composite material |
| CN103643087B (en) * | 2013-11-11 | 2016-03-02 | 江苏大学 | A kind of method preparing Al-Ti-B-O system aluminum-based in-situ composite materials |
| CN104962772A (en) * | 2015-06-02 | 2015-10-07 | 南昌大学 | Method for preparing in-situ Al3Ti particle-reinforced Al-Si-Cu composite material |
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| CN101831564B (en) | 2011-12-21 |
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