CN105506339A - Preparation method of porous TiAl3 intermetallic compound - Google Patents

Preparation method of porous TiAl3 intermetallic compound Download PDF

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Publication number
CN105506339A
CN105506339A CN201511027921.8A CN201511027921A CN105506339A CN 105506339 A CN105506339 A CN 105506339A CN 201511027921 A CN201511027921 A CN 201511027921A CN 105506339 A CN105506339 A CN 105506339A
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porous
intermetallic compound
porous titanium
preparation
tial
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Inventor
李爱滨
宋洋
张学习
王桂松
屈伟
甘维琛
耿林
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/08—Alloys with open or closed pores
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention relates to a preparation method of a porous TiAl3 intermetallic compound. The method comprises the following steps: (I) weighing 56.8-69.2wt% of pure aluminum block and 43.2-30.8wt% of porous titanium respectively, wherein the porosity of the porous titanium is 68.6-78.9%; and (II) putting the linearly cut pure aluminum block and porous titanium in a graphite die and then putting in a vacuum furnace; and after vacuumizing, heating to 680-750 DEG C at a heating speed of 10-20 DEG C per minute, and preserving heat for 2-6h to obtain the porous TiAl3 intermetallic compound. In the invention, the porous TiAl3 intermetallic compound is prepared through non-pressure infiltration of Al into porous titanium; the preparation of a porous TiAl3 intermetallic compound through non-pressure infiltration can be realized only by one vacuum furnace; and less equipment is adopted, the process is simple, the operation is easy, and the method is easy to popularize.

Description

A kind of porous TiAl 3the preparation method of intermetallic compound
Technical field
The present invention relates to a kind of porous TiAl 3the preparation method of intermetallic compound.
Background technology
TiAl 3intermetallic compound has the features such as low density, high-melting-point, high specific strength and high-temperature oxidation resistance excellence, being considered to a kind of very promising lightweight high-temperature structural material, as being prepared into porous material, will widening its superalloy Application Areas.
Intermatallic Ti-Al compound mainly contains Ti 3al, TiAl 3, γ-TiAl three kinds of intermetallic compounds, at present, common element powdered reaction synthesis method does not need to add other pore-forming materials, utilizes reaction process Kirkendall effect between Ti and Al metallic element to carry out reaction pore-creating.But need the mixed powder of Ti and Al, compacting and sintering, comparatively speaking, this preparation method's operation is more complicated, and energy consumption is higher, and cost is more expensive.
Now, Pressure Infiltration is seeped into the dense material preparing γ-TiAl intermetallic compound in sized spherical titanium powder hole by aluminium immersion, require that the porosity of titanium valve incompact-deposit bodies controls between 35 ~ 50%, and in vacuum sintering funace, pressure sintering need be carried out in steel die.Be seeped in sized spherical titanium powder hole by aluminium immersion and prepare TiAl 3during material, require that the porosity of loose media is more than more than 65%, but the maximum pore rate for spherical powder loose media is about 50%, this cannot be realized by sized spherical titanium powder loose depos-its.So far, the report being prepared POROUS TITANIUM Al intermetallic by pressure-free impregnation is seldom seen.
Summary of the invention
The object of the invention is to solve above-mentioned Problems existing, and a kind of porous TiAl is provided 3the preparation method of intermetallic compound.
A kind of porous TiAl of the present invention 3the preparation method of intermetallic compound, it carries out according to following steps:
One, take the fine aluminium block of 56.8 ~ 69.2% and the POROUS TITANIUM of 43.2 ~ 30.8% respectively by mass percentage, wherein the voidage of POROUS TITANIUM is 68.6 ~ 78.9%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven; After vacuumizing, with the heating of the temperature rise rate of 10 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 680 ~ 750 DEG C, obtain described porous TiAl 3intermetallic compound.
The present invention comprises following beneficial effect:
The invention provides liquid Al by capillary force pressure-free impregnation to POROUS TITANIUM to prepare porous TiAl 3intermetallic compound, starting material in powder metallurgic method not only can be avoided to mix the complicated procedures of forming such as powder and compacting, and save vacuum sintering funace and steel die without the need to Pressure Infiltration, as long as a vacuum oven and graphite jig, and directly use the POROUS TITANIUM of high porosity as precast body, obtain porous TiAl 3intermetallic compound, so can reduce supplementary unit cost, simplifies preparation section, easily operates.
The invention provides Al pressure-free impregnation to POROUS TITANIUM to prepare porous TiAl 3intermetallic compound, only can realize pressure-free impregnation with a vacuum oven prepares porous TiAl 3intermetallic compound, Preparation equipment used is few, and operation is simple, processing ease, is easy to promote.
Embodiment
Embodiment one: a kind of porous TiAl of present embodiment 3the preparation method of intermetallic compound, it carries out according to following steps:
One, take the fine aluminium block of 56.8 ~ 69.2% and the POROUS TITANIUM of 43.2 ~ 30.8% respectively by mass percentage, wherein the voidage of POROUS TITANIUM is 68.6 ~ 78.9%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven; After vacuumizing, with the heating of the temperature rise rate of 10 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 680 ~ 750 DEG C, obtain described porous TiAl 3intermetallic compound.
The fine aluminium block purity of present embodiment is 99.9%.
Embodiment two: present embodiment and embodiment one unlike: take the fine aluminium block of 56.8 ~ 69% and the POROUS TITANIUM of 43.2 ~ 31% respectively by mass percentage.Other is identical with embodiment one.
Embodiment three: present embodiment and embodiment one unlike: take the fine aluminium block of 56.8 ~ 65% and the POROUS TITANIUM of 43.2 ~ 35% respectively by mass percentage.Other is identical with embodiment one.
Embodiment four: present embodiment and embodiment one unlike: take the fine aluminium block of 56.8 ~ 60% and the POROUS TITANIUM of 43.2 ~ 40% respectively by mass percentage.Other is identical with embodiment one.
Embodiment five: present embodiment and embodiment one unlike: take the fine aluminium block of 56.8 ~ 58% and the POROUS TITANIUM of 43.2 ~ 42% respectively by mass percentage.Other is identical with embodiment one.
Embodiment six: present embodiment and embodiment one unlike: take the fine aluminium block of 56.8 ~ 58% and the POROUS TITANIUM of 43.2 ~ 42% respectively by mass percentage.Other is identical with embodiment one.
Embodiment seven: present embodiment and embodiment one unlike: the voidage of POROUS TITANIUM is 70 ~ 78%.Other is identical with embodiment one.
Embodiment eight: present embodiment and embodiment one unlike: the voidage of POROUS TITANIUM is 71 ~ 78%.Other is identical with embodiment one.
Embodiment nine: present embodiment and embodiment one unlike: the voidage of POROUS TITANIUM is 72 ~ 78%.Other is identical with embodiment one.
Embodiment ten: present embodiment and embodiment one unlike: the voidage of POROUS TITANIUM is 73 ~ 78%.Other is identical with embodiment one.
Embodiment 11: present embodiment and embodiment one unlike: the voidage of POROUS TITANIUM is 74 ~ 78%.Other is identical with embodiment one.
Embodiment 12: present embodiment and embodiment one unlike: the voidage of POROUS TITANIUM is 75 ~ 78%.Other is identical with embodiment one.
Embodiment 13: present embodiment and embodiment one unlike: the voidage of POROUS TITANIUM is 76 ~ 78%.Other is identical with embodiment one.
Embodiment 14: present embodiment and embodiment one unlike: heat with the temperature rise rate of 12 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 690 ~ 750 DEG C.Other is identical with embodiment one.
Embodiment 15: present embodiment and embodiment one unlike: heat with the temperature rise rate of 15 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 700 ~ 750 DEG C.Other is identical with embodiment one.
Embodiment 16: present embodiment and embodiment one unlike: heat with the temperature rise rate of 18 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 720 ~ 750 DEG C.Other is identical with embodiment one.
Content of the present invention is not limited only to the content of the respective embodiments described above, and the combination of one of them or several embodiment equally also can realize the object of inventing.
Beneficial effect of the present invention is verified by following examples:
Embodiment 1
A kind of porous TiAl of the present embodiment 3the preparation method of intermetallic compound, it carries out according to following steps:
One, take the fine aluminium block of 62.8% and the POROUS TITANIUM of 37.2% respectively by mass percentage, wherein, the voidage of POROUS TITANIUM is 73.8%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven.After vacuumizing, heat with 20 DEG C/min, until be warming up to 720 DEG C, insulation 4h, makes melting Al pressure-free impregnation in POROUS TITANIUM precast body by capillary force, and reaction forms porous TiAl 3intermetallic compound.
The porosity of the Ti-62.8%wt%Al porous material that the present embodiment is prepared is 58.6%, and tensile strength is 32MPa.
Embodiment 2
A kind of porous TiAl of the present embodiment 3the preparation method of intermetallic compound, it carries out according to following steps:
One, take the fine aluminium block of 63% and the POROUS TITANIUM of 37% respectively by mass percentage, wherein, the voidage of POROUS TITANIUM is 72%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven.After vacuumizing, heat with 20 DEG C/min, until be warming up to 720 DEG C, insulation 4h, makes melting Al pressure-free impregnation in POROUS TITANIUM precast body by capillary force, and reaction forms porous TiAl 3intermetallic compound.
Embodiment 3
A kind of porous TiAl of the present embodiment 3the preparation method of intermetallic compound, it carries out according to following steps:
One, take the fine aluminium block of 64% and the POROUS TITANIUM of 36% respectively by mass percentage, wherein, the voidage of POROUS TITANIUM is 74%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven.After vacuumizing, heat with 20 DEG C/min, until be warming up to 720 DEG C, insulation 4h, makes melting Al pressure-free impregnation in POROUS TITANIUM precast body by capillary force, and reaction forms porous TiAl 3intermetallic compound.
Embodiment 4
A kind of porous TiAl of the present embodiment 3the preparation method of intermetallic compound, it carries out according to following steps:
One, take the fine aluminium block of 67% and the POROUS TITANIUM of 33% respectively by mass percentage, wherein, the voidage of POROUS TITANIUM is 76%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven.After vacuumizing, heat with 20 DEG C/min, until be warming up to 720 DEG C, insulation 4h, makes melting Al pressure-free impregnation in POROUS TITANIUM precast body by capillary force, and reaction forms porous TiAl 3intermetallic compound.
Embodiment 5
A kind of porous TiAl of the present embodiment 3the preparation method of intermetallic compound, it carries out according to following steps:
One, take the fine aluminium block of 69% and the POROUS TITANIUM of 31% respectively by mass percentage, wherein, the voidage of POROUS TITANIUM is 78%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven.After vacuumizing, heat with 20 DEG C/min, until be warming up to 720 DEG C, insulation 4h, makes melting Al pressure-free impregnation in POROUS TITANIUM precast body by capillary force, and reaction forms porous TiAl 3intermetallic compound.
Above embodiment provides melting Al by capillary force pressure-free impregnation to POROUS TITANIUM to prepare porous TiAl 3intermetallic compound, starting material in powder metallurgic method not only can be avoided to mix the complicated procedures of forming such as powder and compacting, and save vacuum sintering funace and steel die without the need to Pressure Infiltration, as long as a vacuum oven and graphite jig, and directly use the POROUS TITANIUM of high porosity as precast body, obtain porous TiAl 3intermetallic compound, so reduce supplementary unit cost, simplifies preparation section, easily operates.
Finally should be noted that; above embodiment is only do not limit the scope of the invention the description of the better embodiment of the present invention; although with reference to preferred embodiment to invention has been detailed description; those skilled in the art are to be understood that; can modify to technical solution of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.

Claims (10)

1. a porous TiAl 3the preparation method of intermetallic compound, is characterized in that it carries out according to following steps:
One, take the fine aluminium block of 56.8 ~ 69.2% and the POROUS TITANIUM of 43.2 ~ 30.8% respectively by mass percentage, wherein, the voidage of POROUS TITANIUM is 68.6 ~ 78.9%;
Two, fine aluminium block is become the block suitable with graphite jig geomery with POROUS TITANIUM Linear cut, then fine aluminium block and POROUS TITANIUM are put into graphite jig successively, more whole graphite jig is put into vacuum oven; After vacuumizing, with the heating of the temperature rise rate of 10 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 680 ~ 750 DEG C, obtain described porous TiAl 3intermetallic compound.
2. a kind of porous TiAl according to claim 1 3the preparation method of intermetallic compound, is characterized in that taking the fine aluminium block of 56.8 ~ 69% and the POROUS TITANIUM of 43.2 ~ 31% respectively by mass percentage.
3. a kind of porous TiAl according to claim 2 3the preparation method of intermetallic compound, is characterized in that taking the fine aluminium block of 56.8 ~ 65% and the POROUS TITANIUM of 43.2 ~ 35% respectively by mass percentage.
4. a kind of porous TiAl according to claim 3 3the preparation method of intermetallic compound, is characterized in that taking the fine aluminium block of 56.8 ~ 60% and the POROUS TITANIUM of 43.2 ~ 40% respectively by mass percentage.
5. a kind of porous TiAl according to claim 4 3the preparation method of intermetallic compound, is characterized in that taking the fine aluminium block of 56.8 ~ 58% and the POROUS TITANIUM of 43.2 ~ 42% respectively by mass percentage.
6. a kind of porous TiAl according to claim 1 3the preparation method of intermetallic compound, is characterized in that the voidage of POROUS TITANIUM is 70 ~ 78%.
7. a kind of porous TiAl according to claim 6 3the preparation method of intermetallic compound, is characterized in that the voidage of POROUS TITANIUM is 72 ~ 76%.
8. a kind of porous TiAl according to claim 7 3the preparation method of intermetallic compound, is characterized in that the voidage of POROUS TITANIUM is 74 ~ 76%.
9. a kind of porous TiAl according to claim 1 3the preparation method of intermetallic compound, is characterized in that with the heating of the temperature rise rate of 15 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 700 ~ 750 DEG C.
10. a kind of porous TiAl according to claim 9 3the preparation method of intermetallic compound, is characterized in that with the heating of the temperature rise rate of 18 ~ 20 DEG C/min, until be incubated 2 ~ 6h after being warming up to 730 ~ 750 DEG C.
CN201511027921.8A 2015-12-30 2015-12-30 Preparation method of porous TiAl3 intermetallic compound Pending CN105506339A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106222500A (en) * 2016-07-26 2016-12-14 沈阳大学 A kind of aluminum matrix composite and preparation method
CN110560692A (en) * 2019-10-08 2019-12-13 广东省材料与加工研究所 Porous Ti-Al-based alloy material, preparation method and application thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106222500A (en) * 2016-07-26 2016-12-14 沈阳大学 A kind of aluminum matrix composite and preparation method
CN106222500B (en) * 2016-07-26 2018-04-13 沈阳大学 A kind of aluminum matrix composite and preparation method
CN110560692A (en) * 2019-10-08 2019-12-13 广东省材料与加工研究所 Porous Ti-Al-based alloy material, preparation method and application thereof

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