CN100376700C - AI-Zr-B-O reacting system for synthesizing high-performance aluminium-base copmosite material in-situ and synthetic material thereof - Google Patents

AI-Zr-B-O reacting system for synthesizing high-performance aluminium-base copmosite material in-situ and synthetic material thereof Download PDF

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CN100376700C
CN100376700C CNB200510038149XA CN200510038149A CN100376700C CN 100376700 C CN100376700 C CN 100376700C CN B200510038149X A CNB200510038149X A CN B200510038149XA CN 200510038149 A CN200510038149 A CN 200510038149A CN 100376700 C CN100376700 C CN 100376700C
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aluminium
reaction system
reaction
situ
copmosite
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CN1644722A (en
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赵玉涛
程晓农
戴起勋
陈刚
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Jiangsu University
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Jiangsu University
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Abstract

The present invention aims to provide an AI-Zr-B-O reaction system for synthesizing high-performance aluminium-base in-situ copmosite materials, and the new system is used for synthesizing high-performance aluminium-base in-situ copmosite materials. The mixed powder of salt or oxide containing Zr and B is added to melted aluminium or aluminium alloy at the temperature of 850 DEG C to 900 DEG C for a reaction, the mixed powder accounts for 5 to 25% of liquid aluminium or the melted aluminium alloy by mass, and thus, the AI-Zr-B-O reaction system is formed. The AI-Zr-B-O reaction system is solidified to obtain polyphase high-performance aluminium-base copmosite materials having compound reinforced granules. The materials are composed of the multiple reinforced granules of Al3 Zr, ZrB2 and Al2 O3 and Al or Al alloy basal bodies, wherein the multiple reinforced granules account for 3% to 15% of the volume of the composite materials. The initial reaction temperature of the AI-Zr-B-O system is obviously lower than that of a conventional Al-Ti-X system, the reaction is stable, and the present invention is favorable for industrial application. The synthetic (Al3 Zr+Al2 O3 +ZrB2)/Al and (Al3 Zr+Al2 O3 +ZrB2)/A356 novel in-situ aluminium-base copmosite materials have the advantages of favorable mechanical properties, physical properties and abrasive resistance and low cost.

Description

The Al-Zr-B-O reaction system of synthesized high-performance aluminum-based in-situ composite materials and synthetic novel material thereof
Technical field
The present invention relates to a kind of reaction system of novel synthetic composite material, refer in particular to the Al-Zr-B-O reaction system and the synthetic novel material thereof of synthesized high-performance aluminum-based in-situ composite materials.
Background technology
In recent years, reactive synthesis technique (Reactive synthesis) is widely used in preparing metal matrix in-situ composite (In-situ composites).This method is because to strengthen body be original position forming core, the thermodynamically stable phase of growing up from metallic matrix, so it is pollution-free to strengthen the surface, avoided the problem bad with the matrix consistency, and interface bond strength height, thereby be described as and have breakthrough new technology and extremely pay attention to, become a new focus in the research of metal matrix (particularly aluminium base) matrix material in recent years.
Because in-situ composite is by suitable reagent (gas phase, liquid phase or powdered form solid phase), under suitable temperature, prepares by means of matrix metal and the chemical reaction between them.Therefore, reaction system is the important factor of decision in-situ composite performance, preparation complexity and cost.Its development philosophy comprises following several respects: (1) generates the performance that strengthens body; (2) the morphology Control complexity of enhancing body; (3) interface conditions of enhancing body and matrix; (4) Fan Ying severe degree and initial reaction temperature; (5) reactant source and price etc.But present reaction system only concentrates on Al-Ti-X (Al-Ti-O, Al-Ti-B, Al-Ti-C) and is, this system initial reaction temperature height usually is higher than 1100 ℃, even surpasses 1200 ℃, severe exacerbation aluminium liquid.
Summary of the invention
The Al-Zr-B-O reaction system that the purpose of this invention is to provide a kind of synthesized high-performance aluminum-based in-situ composite materials, and with this new system synthesized high-performance aluminum-based in-situ composite materials.The reactant of getting different ratios according to different needs carries out mixing, and reaction mixture is added in the molten aluminum liquid, forms the Al-Zr-B-O reaction system, final synthesized high-performance aluminum-based in-situ composite materials.
A kind of Al-Zr-B-O reaction system of synthesized high-performance aluminum-based in-situ composite materials, it is characterized in that: in the melt of the aluminum or aluminum alloy between 850 ℃～900 ℃, add 5～25% contain Zr and contain the oxide compound of B or the mixing powder of salt that mass percent accounts for aluminium liquid or aluminium alloy melt, react, thereby constitute the Al-Zr-B-O reaction system.
Utilize the chemosynthesis original position under the high temperature to generate pottery or intermetallic compound particle, and disperse is distributed in and forms the Al-Zr-B-O reaction system in the melt of matrix, this Al-Zr-B-O reaction system coagulation forming obtains the compound enhanced high-performance aluminum-base composite material of heterogeneous particle, and it is characterized in that: above-mentioned materials is by Al 3Zr, ZrB 2And Al 2O 3Polynary enhanced granule and Al or Al alloy substrate are formed, and the volume fraction that wherein polynary enhanced granule accounts for this matrix material is 3%～15%.
Novel reaction in synthetic system Al-Zr-B-O of the present invention and synthetic novel material thereof have following advantage:
(1) initial reaction temperature of building-up reactions is moderate.Al-Zr-B-O system can react under 850 ℃～900 ℃ usually, and reacting initial temperature significantly is lower than conventional Al-Ti-X system, and reacting balance, and is very favourable to industrial applications.
(2) the synthetic particle not only has high intensity, consistency and elasticity modulus, and particle size is less than 1um, Al 3Zr, ZrB 2And Al 2O 3The form of reinforced particulate is easy to control, all becomes subsphaeroidal, and in matrix uniform distribution.
(3) the interface cleaning between particle and the matrix, the bonding strength height.
(4) synthetic (Al 3Zr+Al 2O 3+ ZrB 2)/Al and (Al 3Zr+Al 2O 3+ ZrB 2The novel in-situ Al-base composition of)/A356 has superior mechanical property, physicals and wear resistance.
(5) reactant wide material sources, and its Costco Wholesale only is 1/10～1/20 of a metal-powder.
Description of drawings
The facies analysis figure of Fig. 1 .Al-Zr-B-O reaction in new system synthetic composite material
The micro-organization chart of Fig. 2 .Al-Zr-B-O reaction in new system synthetic composite material
Particle/basal body interface the figure of Fig. 3 .Al-Zr-B-O reaction in new system synthetic composite material
Embodiment
Embodiment 1: utilize resistance furnace to be heated to 850 ℃, make the metallic aluminium fusing in the crucible.After the molten aluminum refining, leaving standstill, the zirconium white (ZrO of aluminium liquid 5wt.% will be accounted for 2) and boron oxide (B 2O 3) powder (purity of powder is 99%, mean particle size 80 μ m) mixing and stirring, wherein ZrO 2, B 2O 3Press Zr, B molar weight than mixing in 1: 1.Then at 200 ℃ of following preheating 2h, and adopt pneumatic conveying method to join in the molten aluminum liquid and react, thereby constitute the Al-Zr-B-O reaction system with conduit.Adopt argon gas as shielding gas in the course of conveying, adopt the graphite stirring rod to stir simultaneously.The Al-Zr-B-O reaction system adopts nitrogen refining 8min after 30min fully reacts, pour into subsequently in the metal pattern, prepares (ZrAl 3+ ZrB 2+ Al 2O 3) particle enhanced aluminum-based composite material, wherein the total volume fraction of enhanced granule is 3.0%.
Embodiment 2: utilize resistance furnace to be heated to 870 ℃, make the metallic aluminium fusing in the crucible.After the molten aluminum refining, leaving standstill, the zirconium white (ZrO of aluminium liquid 10wt.% will be accounted for 2) and potassium fluoborate (KBF 4) powder (purity of powder is 99%, mean particle size 80 μ m) mixing and stirring, wherein ZrO 2, KBF 4Press Zr, B molar weight than mixing in 1: 2.Then at 200 ℃ of following preheating 2h, and adopt pneumatic conveying method to join in the molten aluminum liquid and react, thereby constitute the Al-Zr-B-O reaction system with conduit.Adopt argon gas as shielding gas in the course of conveying, adopt the graphite stirring rod to stir simultaneously.The Al-Zr-B-O reaction system adopts nitrogen refining 8min after 30min fully reacts, pour into subsequently in the metal pattern, prepares (ZrAl 3+ ZrB 2+ Al 2O 3) particle enhanced aluminum-based composite material, wherein the total volume fraction of enhanced granule is 6.0%.
Embodiment 3: utilize resistance furnace to be heated to 890 ℃, make the A356 alloy melting in the crucible.With fusion A356 refining and modifying, leave standstill after, will account for the zirconium silicate (ZrSiO of A356 alloy melt 15wt.% 4) and boron oxide (KBF 4) powder (purity 99%, mean particle size 80 μ m) mixing and stirring, ZrSiO 4, KBF 4Press Zr, B molar weight than mixing in 1: 2.Then at 200 ℃ of following preheating 2h, and adopt pneumatic conveying method to join in the A356 alloy liquation and react, thereby constitute the Al-Zr-B-O reaction system with conduit.Adopt argon gas as shielding gas in the course of conveying, adopt the graphite stirring rod to stir simultaneously.The Al-Zr-B-O reaction system adopts nitrogen refining 8min after 30min fully reacts, pour into subsequently in the metal pattern, prepares (ZrAl 3+ ZrB 2+ Al 2O 3) the particle reinforced A 356 alloy-base composite material, the total volume fraction of enhanced granule is 8.9%.
Embodiment 4: utilize resistance furnace to be heated to 900 ℃, make the A356 alloy melting in the crucible.With fusion A356 refining and modifying, leave standstill after, will account for the zirconium carbonate (Zr (CO of A356 aluminium alloy melt 25wt.% 3) 2) and Sodium tetrafluoroborate (NaBF 4) powder (purity of powder is 99%, mean particle size 80 μ m) mixing and stirring, wherein Zr (CO 3) 2, NaBF 4Press Zr, B molar weight than mixing in 1: 2.Then at 200 ℃ of following preheating 2h, and adopt pneumatic conveying method to join in the molten aluminum liquid and react, thereby constitute the Al-Zr-B-O reaction system with conduit.Adopt argon gas as shielding gas in the course of conveying, adopt the graphite stirring rod to stir simultaneously.The Al-Zr-B-O reaction system adopts nitrogen refining 8min after 30min fully reacts, pour into subsequently in the metal pattern, prepares (ZrAl 3+ ZrB 2+ Al 2O 3) the particle reinforced A 356 alloy-base composite material, wherein the total volume fraction of enhanced granule is 14.8%.
The matrix material that above-mentioned four embodiment form and the performance index such as the table 1 of matrix thereof.
Table 1 (ZrAl 3+ ZrB 2+ Al 2O 3) performance index (T6 attitude) of particle enhanced aluminum-based composite material and matrix
Material Tensile strength (MPa) Yield strength (MPa) Young's modulus (GPa) Elongation (%)
Fine aluminium AOO 76.8 41.5 71.4 30.2
3vol.％(ZrAl 3+ZrB 2+Al 2O 3)/Al 178.8 152.4 85.3 11.8
6vol.％(ZrAl 3+ZrB 2+Al 2O 3)/Al 246.8 180.9 92.6 9.4
A356 245.3 165.8 81.3 11.6
9vol.％(ZrAl 3+ZrB 2+Al 2O 3)/A356 378.6 315.3 96.9 7.8
15vol.％(ZrAl 3+ZrB 2+Al 2O 3)/A356 402.3 345.4 104.3 5.9

Claims (2)

1. the Al-Zr-B-O reaction system of a synthesized high-performance aluminum-based in-situ composite materials, it is characterized in that: in the melt of the aluminum or aluminum alloy between 850 ℃～900 ℃, add 5～25% contain Zr and contain the oxide compound of B or the mixing powder of salt that mass percent accounts for aluminium liquid, react, thereby constitute the Al-Zr-B-O reaction system.
2. one kind is utilized the compound enhanced high-performance aluminum-base composite material of the heterogeneous particle of the described Al-Zr-B-O reaction system of claim 1 synthetic, it is characterized in that: by the described Al-Zr-B-O reaction system of claim 1 after abundant reaction, adopt the nitrogen refining, pour in the metal pattern subsequently and make, material is by Al 3Zr, ZrB 2. and Al 2O 3Polynary enhanced granule and Al or Al alloy substrate are formed, and the volume fraction that wherein polynary enhanced granule accounts for this matrix material is 5～15%.
CNB200510038149XA 2005-01-19 2005-01-19 AI-Zr-B-O reacting system for synthesizing high-performance aluminium-base copmosite material in-situ and synthetic material thereof Active CN100376700C (en)

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WO2017166444A1 (en) * 2016-04-01 2017-10-05 江苏大学 Anti-fatigue in-situ aluminium-based composite material for heavy-load hubs and preparation method therefor

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CN1944699B (en) * 2006-07-14 2010-05-12 江苏大学 High volume fractional endogenous granular reinforced aluminum base composite material and its preparing method
CN102212724A (en) * 2011-05-20 2011-10-12 江苏大学 Al-Zr-B intermediate alloy as well as preparation method and application thereof
CN104928542B (en) * 2015-05-19 2017-05-03 江苏大学 Preparation method for 6X82-matrix composites for automobile control arms
CN109234561B (en) * 2018-10-31 2020-11-20 江苏大学 Preparation method of in-situ dual-phase nanoparticle reinforced aluminum matrix composite

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017166444A1 (en) * 2016-04-01 2017-10-05 江苏大学 Anti-fatigue in-situ aluminium-based composite material for heavy-load hubs and preparation method therefor
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