CN109338255B - Method for preparing tungsten-nickel bimetal composite material - Google Patents
Method for preparing tungsten-nickel bimetal composite material Download PDFInfo
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- CN109338255B CN109338255B CN201811300174.4A CN201811300174A CN109338255B CN 109338255 B CN109338255 B CN 109338255B CN 201811300174 A CN201811300174 A CN 201811300174A CN 109338255 B CN109338255 B CN 109338255B
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The invention relates to a method for preparing a tungsten-nickel bimetal composite material, which comprises the following steps: sequentially laying a first metal tungsten powder layer, a first carbon fiber net, a metal nickel powder layer, a second carbon fiber net and a second metal tungsten powder layer from bottom to top in a cavity of a pressing die to obtain a tungsten-nickel bimetal composite material mixing layer, wherein the thicknesses of the first carbon fiber net and the second carbon fiber net are both 1-3 cm, the bottom of the first carbon fiber net is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber net is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber net is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber net is embedded into the bottom of the second metal tungsten powder layer; laminating the tungsten-nickel bimetal composite mixture by using the pressing mould to prepare a tungsten-nickel bimetal composite green body; and sintering the tungsten-nickel bimetal composite green body at 1550-1750 ℃ to obtain the tungsten-nickel bimetal composite material. The service life of the prepared tungsten-nickel bimetal composite material is greatly prolonged.
Description
Technical Field
The invention relates to the field of metal composite materials, in particular to a method for preparing a tungsten-nickel bimetal composite material.
Background
Tungsten is a rare high-melting-point metal, is hard and brittle in texture, has a very high melting point, and is widely used in the fields of electric appliances, electronic equipment and the like. The single component tungsten metal is limited in use due to its high cost and high brittleness. At present, tungsten and other metals are often prepared into an embedded composite metal material in the industry to reduce the cost and overcome the defect of high brittleness of single tungsten metal, but the composite metal material prepared by the method has poor bonding force and is easy to crack under high temperature conditions, and the service life is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a method for preparing a tungsten-nickel bimetal composite material so as to prolong the service life of the prepared tungsten-nickel bimetal composite material.
In order to solve the technical problems, the invention adopts the technical scheme that:
a method for preparing a tungsten-nickel bimetallic composite material, comprising the steps of:
s1, sequentially laying a first metal tungsten powder layer, a first carbon fiber mesh, a metal nickel powder layer, a second carbon fiber mesh and a second metal tungsten powder layer from bottom to top in a cavity of a pressing die to obtain a tungsten-nickel bimetal composite material layer, wherein the thicknesses of the first carbon fiber mesh and the second carbon fiber mesh are 1-3 cm, the bottom of the first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber mesh is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber mesh is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber mesh is embedded into the bottom of the second metal tungsten powder layer;
s2, laminating the tungsten-nickel bimetal compound material by using the pressing mould to prepare a tungsten-nickel bimetal compound green body;
s3, sintering the tungsten-nickel bimetal composite green body at 1550-1750 ℃ to obtain the tungsten-nickel bimetal composite material.
The invention has the beneficial effects that: after the tungsten-nickel bimetal composite mixed material is laminated to prepare a tungsten-nickel bimetal composite green body, the first metal tungsten powder layer, the metal nickel powder layer and the second metal tungsten powder layer are bonded in pairs primarily, the tungsten-nickel bimetal composite green body is sintered into the tungsten-nickel bimetal composite material at 1550-1750 ℃, nickel-tungsten atoms between the first metal tungsten powder layer and the metal nickel powder layer and nickel-tungsten atoms between the second metal tungsten powder layer and the metal nickel powder layer are respectively diffused mutually, a first tungsten-nickel diffusion bonding interface is formed between the first metal tungsten powder layer and the metal nickel powder layer, a second tungsten-nickel diffusion bonding interface is formed between the second metal tungsten powder layer and the metal nickel powder layer, compared with the traditional mechanical embedding structure, the bonding strength between tungsten and nickel is improved, the bottom of the first carbon fiber net is embedded into the top of the first metal tungsten powder layer, and the top of the first carbon fiber net is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber net is embedded into the top of the metal nickel powder layer, the top of the second carbon fiber net is embedded into the bottom of the second metal tungsten powder layer, the first metal tungsten powder layer and the metal nickel powder layer are further tightly connected through the first carbon fiber net, and the second metal tungsten powder layer and the metal nickel powder layer are further tightly connected through the second carbon fiber net, so that the bonding strength of a tungsten-nickel interface is further greatly improved, and the service life of the prepared tungsten-nickel bimetal composite material is prolonged.
Drawings
Fig. 1 is a schematic flow chart of a method for preparing a tungsten-nickel bimetallic composite material according to the invention.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: the bottom of the first carbon fiber net is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber net is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber net is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber net is embedded into the bottom of the second metal tungsten powder layer.
Referring to fig. 1, the method for preparing a tungsten-nickel bimetal composite material provided by the present invention includes the following steps:
s1, sequentially laying a first metal tungsten powder layer, a first carbon fiber mesh, a metal nickel powder layer, a second carbon fiber mesh and a second metal tungsten powder layer from bottom to top in a cavity of a pressing die to obtain a tungsten-nickel bimetal composite material layer, wherein the thicknesses of the first carbon fiber mesh and the second carbon fiber mesh are 1-3 cm, the bottom of the first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber mesh is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber mesh is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber mesh is embedded into the bottom of the second metal tungsten powder layer;
s2, laminating the tungsten-nickel bimetal compound material by using the pressing mould to prepare a tungsten-nickel bimetal compound green body;
s3, sintering the tungsten-nickel bimetal composite green body at 1550-1750 ℃ to obtain the tungsten-nickel bimetal composite material.
As can be seen from the above description, after the tungsten-nickel bimetal composite mixed material is laminated to form the tungsten-nickel bimetal composite green compact, two by two primary bonding between the first metal tungsten powder layer, the metal nickel powder layer and the second metal tungsten powder layer, the tungsten-nickel bimetal composite green compact is sintered to form the tungsten-nickel bimetal composite material at 1550 to 1750 ℃, nickel-tungsten atoms between the first metal tungsten powder layer and the metal nickel powder layer and nickel-tungsten atoms between the second metal tungsten powder layer and the metal nickel powder layer are respectively diffused to each other, a first tungsten-nickel diffusion bonding interface is formed between the first metal tungsten powder layer and the metal nickel powder layer, a second tungsten-nickel diffusion bonding interface is formed between the second metal tungsten powder layer and the metal nickel powder layer, compared with the conventional mechanical embedding structure, the bonding strength between tungsten and nickel is improved, the bottom of the first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, and the top of the first carbon fiber mesh is embedded into the bottom of the metal nickel powder, the bottom of the second carbon fiber net is embedded into the top of the metal nickel powder layer, the top of the second carbon fiber net is embedded into the bottom of the second metal tungsten powder layer, the first metal tungsten powder layer and the metal nickel powder layer are further tightly connected through the first carbon fiber net, and the second metal tungsten powder layer and the metal nickel powder layer are further tightly connected through the second carbon fiber net, so that the bonding strength of a tungsten-nickel interface is further greatly improved, and the service life of the prepared tungsten-nickel bimetal composite material is prolonged.
Further, in S1, a metal iron layer is deposited on both the carbon fiber surface of the first carbon fiber mesh and the carbon fiber surface of the second carbon fiber mesh.
From the above description, it can be known that iron atoms in the metallic iron layer will diffuse into the tungsten phase and the nickel phase to form a tungsten-nickel-iron composite phase around the first carbon fiber mesh and the second carbon fiber mesh, respectively, so that the connection strength of the tungsten-nickel composite interface is greatly improved.
Further, the deposition of the metallic iron layer comprises the following steps:
and respectively cleaning the surfaces of the first carbon fiber net and the second carbon fiber net by using alcohol, and then respectively putting the first carbon fiber net and the second carbon fiber net into a physical vapor deposition furnace to perform iron deposition on the surfaces of the carbon fibers of the first carbon fiber net and the surfaces of the carbon fibers of the second carbon fiber net for 1-3 hours.
From the above description, the first carbon fiber net and the second carbon fiber net are respectively put into a physical vapor deposition furnace for iron deposition, and the obtained metal iron layer has uniform thickness, so that the obtained tungsten-nickel-iron composite phase is uniformly distributed around the first carbon fiber net and the second carbon fiber net.
Furthermore, in S1, 0.5 wt% of silicone is mixed in each of the first metal copper powder layer, the second metal copper powder layer, and the metal nickel powder layer.
From the above description, it can be seen that the addition of 0.5 wt% silicone can improve the green strength of the tungsten-nickel bimetal composite green body.
Further, S3 is followed by:
and S4, placing the sintered tungsten-nickel bimetal composite material in a hot-pressing mould for hot-pressing diffusion treatment.
As can be seen from the above description, the hot-pressing diffusion process further diffusion-bonds the tungsten phase and the nickel phase of the tungsten-nickel composite interface.
Further, S4 includes:
s401, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s402, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 1100-1250 ℃, and pressurizing the hot pressing mold to 12-15 MPa;
and S403, preserving the heat of the tungsten-nickel bimetal composite material at 1100-1250 ℃ for 30-60 minutes.
Further, in S1, the metal tungsten powder in the first metal tungsten powder layer and the second metal tungsten powder layer is tungsten carbide alloy powder.
As can be seen from the above description, the tungsten carbide alloy powder can further increase the hardness of the first metal tungsten powder layer and the second metal tungsten powder layer after sintering.
Further, the metal nickel powder in the metal nickel powder layer in S1 is nichrome powder.
As can be seen from the above description, the nichrome powder can further improve the toughness of the metal nickel powder layer.
Further, the pressing pressure of the tungsten-nickel bimetal composite green body in the S2 is 120-160 MPa.
Further, S3 includes: and (3) preserving the heat of the tungsten-nickel bimetal composite green body at 1550-1750 ℃ for 2-3 hours to sinter the tungsten-nickel bimetal composite green body into the tungsten-nickel bimetal composite material.
Referring to fig. 1, a first embodiment of the present invention is:
a method for preparing a tungsten-nickel bimetallic composite material, comprising the steps of:
s1, sequentially laying a first metal tungsten powder layer, a first carbon fiber mesh, a metal nickel powder layer, a second carbon fiber mesh and a second metal tungsten powder layer from bottom to top in a cavity of a pressing die to obtain a tungsten-nickel bimetal composite material layer, wherein the thicknesses of the first carbon fiber mesh and the second carbon fiber mesh are both 3cm, the bottom of the first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber mesh is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber mesh is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber mesh is embedded into the bottom of the second metal tungsten powder layer;
0.5 wt% of silicone is mixed in the first metal copper powder layer, the second metal copper powder layer and the metal nickel powder layer; the metal tungsten powder in the first metal tungsten powder layer and the second metal tungsten powder layer is tungsten carbide alloy powder; the metal nickel powder in the metal nickel powder layer is nickel-chromium alloy powder; metal iron layers are deposited on the carbon fiber surface of the first carbon fiber net and the carbon fiber surface of the second carbon fiber net;
specifically, the deposition of the metallic iron layer comprises the following steps:
respectively cleaning the surfaces of the first carbon fiber net and the second carbon fiber net by using alcohol, and then respectively putting the first carbon fiber net and the second carbon fiber net into a physical vapor deposition furnace to perform iron deposition on the surface of the carbon fiber of the first carbon fiber net and the surface of the carbon fiber of the second carbon fiber net for 1 hour;
s2, laminating the tungsten-nickel bimetal compound material by using the pressing mould to prepare a tungsten-nickel bimetal compound green body;
wherein the pressing pressure of the tungsten-nickel bimetal composite green body is 140 MPa;
s3, sintering the tungsten-nickel bimetal composite green body at 1750 ℃ to obtain the tungsten-nickel bimetal composite material.
Specifically, the tungsten-nickel bimetal composite green compact is subjected to heat preservation at 1750 ℃ for 2 hours, so that the tungsten-nickel bimetal composite green compact is sintered into the tungsten-nickel bimetal composite material
S4, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold for hot-pressing diffusion treatment;
wherein S4 includes:
s401, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s402, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 1125 ℃, and pressurizing the hot pressing mold to 15 MPa;
s403, preserving the heat of the tungsten-nickel bimetal composite material at 1125 ℃ for 30 minutes.
The second embodiment of the invention is as follows:
a method for preparing a tungsten-nickel bimetallic composite material, comprising the steps of:
s1, sequentially laying a first metal tungsten powder layer, a first carbon fiber mesh, a metal nickel powder layer, a second carbon fiber mesh and a second metal tungsten powder layer from bottom to top in a cavity of a pressing die to obtain a tungsten-nickel bimetal composite material layer, wherein the thicknesses of the first carbon fiber mesh and the second carbon fiber mesh are both 2cm, the bottom of the first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber mesh is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber mesh is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber mesh is embedded into the bottom of the second metal tungsten powder layer;
0.5 wt% of silicone is mixed in the first metal copper powder layer, the second metal copper powder layer and the metal nickel powder layer; the metal tungsten powder in the first metal tungsten powder layer and the second metal tungsten powder layer is tungsten carbide alloy powder; the metal nickel powder in the metal nickel powder layer is nickel-chromium alloy powder; metal iron layers are deposited on the carbon fiber surface of the first carbon fiber net and the carbon fiber surface of the second carbon fiber net;
specifically, the deposition of the metallic iron layer comprises the following steps:
respectively cleaning the surfaces of the first carbon fiber net and the second carbon fiber net by using alcohol, and then respectively putting the first carbon fiber net and the second carbon fiber net into a physical vapor deposition furnace to perform iron deposition on the surface of the carbon fiber of the first carbon fiber net and the surface of the carbon fiber of the second carbon fiber net for 3 hours;
s2, laminating the tungsten-nickel bimetal compound material by using the pressing mould to prepare a tungsten-nickel bimetal compound green body;
wherein the pressing pressure of the tungsten-nickel bimetal composite green body is 120 MPa;
s3, sintering the tungsten-nickel bimetal composite green body at 1650 ℃ to obtain the tungsten-nickel bimetal composite material.
Specifically, the tungsten-nickel bimetal composite green body is subjected to heat preservation at 1650 ℃ for 3 hours, so that the tungsten-nickel bimetal composite green body is sintered into the tungsten-nickel bimetal composite material
S4, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold for hot-pressing diffusion treatment;
wherein S4 includes:
s401, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s402, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 1100 ℃, and pressurizing the hot pressing mold to 14 MPa;
and S403, preserving the heat of the tungsten-nickel bimetal composite material at 1100 ℃ for 60 minutes.
The third embodiment of the invention is as follows:
a method for preparing a tungsten-nickel bimetallic composite material, comprising the steps of:
s1, sequentially laying a first metal tungsten powder layer, a first carbon fiber mesh, a metal nickel powder layer, a second carbon fiber mesh and a second metal tungsten powder layer from bottom to top in a cavity of a pressing die to obtain a tungsten-nickel bimetal composite material layer, wherein the thicknesses of the first carbon fiber mesh and the second carbon fiber mesh are both 1cm, the bottom of the first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber mesh is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber mesh is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber mesh is embedded into the bottom of the second metal tungsten powder layer;
0.5 wt% of silicone is mixed in the first metal copper powder layer, the second metal copper powder layer and the metal nickel powder layer; the metal tungsten powder in the first metal tungsten powder layer and the second metal tungsten powder layer is tungsten carbide alloy powder; the metal nickel powder in the metal nickel powder layer is nickel-chromium alloy powder; metal iron layers are deposited on the carbon fiber surface of the first carbon fiber net and the carbon fiber surface of the second carbon fiber net;
specifically, the deposition of the metallic iron layer comprises the following steps:
respectively cleaning the surfaces of the first carbon fiber net and the second carbon fiber net by using alcohol, and then respectively putting the first carbon fiber net and the second carbon fiber net into a physical vapor deposition furnace to perform iron deposition on the surface of the carbon fiber of the first carbon fiber net and the surface of the carbon fiber of the second carbon fiber net for 2 hours;
s2, laminating the tungsten-nickel bimetal compound material by using the pressing mould to prepare a tungsten-nickel bimetal compound green body;
wherein the pressing pressure of the tungsten-nickel bimetal composite green body is 160 MPa;
s3, sintering the tungsten-nickel bimetal composite green body at 1550 ℃ to obtain the tungsten-nickel bimetal composite material.
Specifically, the tungsten-nickel bimetal composite green body is subjected to heat preservation for 2.5 hours at 1550 ℃ so that the tungsten-nickel bimetal composite green body is sintered into the tungsten-nickel bimetal composite material
S4, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold for hot-pressing diffusion treatment;
wherein S4 includes:
s401, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s402, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 1250 ℃, and pressurizing the hot pressing mold to 12 MPa;
and S403, preserving the heat of the tungsten-nickel bimetal composite material at 1250 ℃ for 45 minutes.
In summary, in the method for preparing a tungsten-nickel bimetal composite material provided by the present invention, after laminating a tungsten-nickel bimetal composite mixed material to prepare a tungsten-nickel bimetal composite green body, two by two primary bonding is performed between a first metal tungsten powder layer, a metal nickel powder layer and a second metal tungsten powder layer, the tungsten-nickel bimetal composite green body is sintered to form the tungsten-nickel bimetal composite material at 1550 to 1750 ℃, nickel-tungsten atoms between the first metal tungsten powder layer and the metal nickel powder layer and nickel-tungsten atoms between the second metal tungsten powder layer and the metal nickel powder layer are respectively diffused with each other to form a first tungsten-nickel diffusion bonding interface between the first metal tungsten powder layer and the metal nickel powder layer, and a second tungsten-nickel diffusion bonding interface is formed between the second metal tungsten powder layer and the metal nickel powder layer, so as to improve the bonding strength between tungsten and nickel compared with the conventional mechanical embedding structure, the bottom of a first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, the top of first carbon fiber net imbeds the bottom on metal nickel bisque layer, the bottom embedding metal nickel bisque layer's of second carbon fiber net top, the bottom on second metal tungsten bisque layer is imbed at the top of second carbon fiber net, further zonulae occludens through first carbon fiber net between first metal tungsten bisque layer and the metal nickel bisque layer, further zonulae occludens through the second carbon fiber net between second metal tungsten bisque layer and the metal nickel bisque layer, make the bonding strength at tungsten-nickel interface further promote by a wide margin, in order to promote the life of the tungsten-nickel bimetal composite who makes.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (9)
1. A method for preparing a tungsten-nickel bimetallic composite material is characterized by comprising the following steps of:
s1, sequentially laying a first metal tungsten powder layer, a first carbon fiber mesh, a metal nickel powder layer, a second carbon fiber mesh and a second metal tungsten powder layer from bottom to top in a cavity of a pressing die to obtain a tungsten-nickel bimetal composite material layer, wherein the thicknesses of the first carbon fiber mesh and the second carbon fiber mesh are 1-3 cm, the bottom of the first carbon fiber mesh is embedded into the top of the first metal tungsten powder layer, the top of the first carbon fiber mesh is embedded into the bottom of the metal nickel powder layer, the bottom of the second carbon fiber mesh is embedded into the top of the metal nickel powder layer, and the top of the second carbon fiber mesh is embedded into the bottom of the second metal tungsten powder layer;
s2, laminating the tungsten-nickel bimetal compound material by using the pressing mould to prepare a tungsten-nickel bimetal compound green body;
s3, sintering the tungsten-nickel bimetal composite green body at 1550-1750 ℃ to obtain the tungsten-nickel bimetal composite material.
2. The method for preparing a tungsten-nickel bimetal composite according to claim 1, wherein the carbon fiber surface of the first carbon fiber mesh and the carbon fiber surface of the second carbon fiber mesh are both deposited with a metallic iron layer in S1.
3. The method for preparing a tungsten-nickel bimetallic composite material as in claim 2, wherein the deposition of the metallic iron layer comprises the steps of:
and respectively cleaning the surfaces of the first carbon fiber net and the second carbon fiber net by using alcohol, and then respectively putting the first carbon fiber net and the second carbon fiber net into a physical vapor deposition furnace to perform iron deposition on the surfaces of the carbon fibers of the first carbon fiber net and the surfaces of the carbon fibers of the second carbon fiber net for 1-3 hours.
4. The method for preparing a tungsten-nickel bimetal composite material according to claim 1, wherein 0.5 wt% of silicone is mixed in each of the first metal tungsten powder layer, the second metal tungsten powder layer and the metal nickel powder layer in S1.
5. The method for preparing a tungsten-nickel bimetallic composite material as in claim 1, further comprising, after S3:
and S4, placing the sintered tungsten-nickel bimetal composite material in a hot-pressing mould for hot-pressing diffusion treatment.
6. The method for preparing a tungsten-nickel bimetallic composite material as in claim 5, wherein S4 includes:
s401, placing the sintered tungsten-nickel bimetallic composite material in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s402, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 1100-1250 ℃, and pressurizing the hot pressing mold to 12-15 MPa;
and S403, preserving the heat of the tungsten-nickel bimetal composite material at 1100-1250 ℃ for 30-60 minutes.
7. The method for preparing a tungsten-nickel bimetal composite material according to claim 1, wherein the metal nickel powder in the metal nickel powder layer in the step S1 is nichrome powder.
8. The method for preparing the tungsten-nickel bimetal composite material as claimed in claim 1, wherein the pressing pressure of the tungsten-nickel bimetal composite green body in S2 is 120-160 MPa.
9. The method for preparing a tungsten-nickel bimetallic composite material as in claim 1, wherein S3 includes: and (3) preserving the heat of the tungsten-nickel bimetal composite green body at 1550-1750 ℃ for 2-3 hours to sinter the tungsten-nickel bimetal composite green body into the tungsten-nickel bimetal composite material.
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| CN105818476A (en) * | 2016-03-21 | 2016-08-03 | 中南大学 | Surface-modification three-dimensional-network-carbon-fiber-reinforced composite material and preparing method |
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