KR100629323B1 - Multi-layer material and Munufacturing method therefor - Google Patents

Abstract

The present invention relates to a composite layer material and a method of manufacturing the same,

Mixing the raw powder homogeneously with a binder to obtain a molding mixture, and injecting the obtained molding mixture into a mold by using a powder injection molding apparatus to obtain a molding having a predetermined shape; Attaching a bonding material to the bonding target surface of the molding, and then bonding the object through the bonding material; Degreasing the conjugate of the molding and the object; It comprises a; sintering the degreasing treatment in the sintering furnace;

Various materials such as metals or ceramics are manufactured as one material in the form of a composite layer, but are realized through a simple process.

Composite layer materials, manufacturing

Description

Multi-layer material and Munufacturing method therefor}

1 is a flow chart of a method of manufacturing a composite layer material according to an embodiment of the present invention,

2 is a flow chart showing a manufacturing process of the bonding material according to an embodiment of the present invention,

Figure 3 is a schematic diagram showing a case of manufacturing a bonding material in the tape casting process according to an embodiment of the present invention,

4A and 4B are tissue photographs of the composite layer material prepared by one embodiment of the present invention,

5A and 5B are tissue photographs of a composite layer material prepared by another embodiment of the present invention,

6 is a tissue photograph of a composite layer material prepared by another embodiment of the present invention,

7 is a tissue photograph of a composite layer material prepared by another embodiment of the present invention,

8 is a tissue photograph of a composite layer material prepared by another embodiment of the present invention,

9 is a schematic view showing various examples of the composite layer material produced by the present invention.

<Description of Symbols for Main Parts of Drawings>

10: slurry 30: green tape

40: carrier film 110: reservoir

120: doctor blade 130: hot air means

140: cutting means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite layer material and a method of manufacturing the same. More particularly, the present invention relates to a method of manufacturing a variety of materials such as metals and ceramics into a single layer in the form of a composite layer. A method of making a composite layer material having functionality and a composite layer material produced thereby.

Various types of processing methods have been proposed to manufacture various tool materials or machine parts. Among these processing methods, powder metallurgy which obtains a metal product of the desired form by pressurizing and shaping | molding a metal powder, hardening | curing, and heating and sintering has attracted the spotlight.

Powder metallurgy enables the manufacture of products that are otherwise difficult or impossible to manufacture with other processing methods such as casting and forging.

For example, high-temperature materials such as tungsten, molybdenum, tantalum, refractory, ceramics, etc., which have a high melting temperature, are difficult to be manufactured by melting, but they can be manufactured using powder metallurgy.

Alloys of non-soluble metals (tungsten-copper, iron-palladium), composite materials such as cemented carbide (tungsten carbide-cobalt), dispersion reinforcing materials, electrical contact materials, Composite materials of metal-nonmetals such as copper-graphite, materials having a layered structure such as dental amalgam, and the like can also be manufactured through powder metallurgy.

Porous materials such as bearings, filters or sponge-like materials cannot be obtained as castings but can be manufactured with powder metallurgy.

On the other hand, in recent years, such a powder metallurgy to manufacture a product consisting of a composite material of metal-heterometal, metal-non-metal, or to manufacture a product in the form of a composite layer material in which these materials form a separate layer integrally combined The trend is in the spotlight.

For example, in the case of a mechanical part, the main body part is formed by a general metal powder layer, and the part which is rubbed with other parts is formed by a mixed metal powder layer to which wear resistant powder is added.

However, the technique of manufacturing a composite layer material using powder metallurgy has the following limitations.

First, in order to manufacture a molded body using powder, each powder layer injected into the mold must be pressurized with a punch-like mechanism. It was difficult to make.

In addition, since the process of injecting each powder layer into the mold is actually a situation that greatly depends on the manual work, there is a problem that the productivity is greatly reduced and the production cost is increased. In particular, this problem is more serious when the heterogeneous powder layer is formed in multiple layers.

The present invention has been made in view of the above problems, and is a method of manufacturing various materials such as metals or ceramics into a single layer in the form of a composite layer, and in particular, by applying a brazing method, a composite having high functionality at low cost It is an object to provide a method for producing a layer material.

Moreover, another object of this invention is to provide the composite layer material manufactured by such a manufacturing method.

The present invention for achieving the above object, homogeneously mixing the raw material powder with a binder to obtain a molding mixture, by using a powder injection molding apparatus to inject the obtained molding mixture into a mold to obtain a molded article of a predetermined shape step; Attaching a bonding material to the bonding target surface of the molding, and then bonding the object through the bonding material; Degreasing the conjugate of the molding and the object; And sintering the degreased conjugate in a sintering furnace.

More preferably, the raw powder is selected from the group consisting of metal powder, ceramic powder, carbide powder, glass powder, oxide powder, diamond powder or mixtures thereof.

More preferably, the binder is an organic binder, the molding mixture is composed of the raw material powder 40 ~ 60 vol% and the remaining amount of the binder.

More preferably, the raw material powder and the binder is mixed homogeneously for 2 to 3 hours at a temperature condition of 80 ~ 150 ℃.

More preferably, the injection is made at an injection pressure of 1000 ~ 3000 psi in a state where the molding mixture is heated to 150 ~ 500 ℃.

More preferably, the bonding material is applied by applying to the surface to be bonded as a brazing paste.

According to another aspect of the present invention, the bonding material is a green tape made by tape casting and laminated on the surface to be bonded.

More preferably, the object is a molding obtained by homogeneously mixing the raw material powder with a binder to obtain a molding mixture, and injecting the obtained molding mixture into a mold by using a powder injection molding apparatus. .

According to another aspect of the present invention, the object is any one of a metal member, a ceramic member, and a metal-glass mixed sintered body.

More preferably, the degreasing is carried out in a pyrolysis method in a vacuum furnace, by heating at a temperature increase rate of 20 ~ 35 ℃ / hr from 80 ℃ to 600 ℃.

More preferably, the sintering is carried out under a reducing hydrogen atmosphere or a nitrogen atmosphere, when the raw powder is made of a metal powder or diamond powder, a mixture thereof, the first temperature conditions of 500 ~ 1300 ℃, the raw powder is a ceramic powder or Carbide powder, glass powder, oxide powder, or a mixture thereof, the second temperature conditions of 1000 ~ 1500 ℃, the raw material powder is a mixture powder of the powder of the first temperature conditions and the powder of the second temperature conditions 500 A predetermined temperature is achieved while the third temperature condition of ˜1300 ° C. is maintained.

The present invention applies a brazing method to produce a product in the form of a composite layer material in which various materials, such as a metal, a nonmetal, a mixture of a metal-divalent metal, a mixture of a metal-nonmetal, and a single layer are integrally bonded to each other. Bonding material having a slurry form, such as tape casting is further applied in the form of a green tape.

In the present invention, in particular, another molding or metal member is bonded to the powder-molded green body by the above method, and then prepared as one composite layer material by degreasing and sintering.

Powder Injection Molding (PIM) is a fusion of injection molding technology developed in the plastics field and metal powder sintering technology developed in the powder metallurgy field. Its existing technologies such as cutting, precision casting, die casting and powder metallurgy It is a high-tech processing technology that enables mass production of high-performance complex precision parts that are difficult to manufacture or costly at low cost.

The general powder injection molding consists of a mixing process of powder and binder, injection molding process, debinding process, and sintering process. It is further classified into (Metal Injection Molding, MIM) or Ceramic Injection Molding (CIM).

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a flow chart of a method of manufacturing a composite layer material according to an embodiment of the present invention, Figure 2 is a flow chart showing a manufacturing process of the bonding material according to an embodiment of the present invention.

First, the raw powder is mixed homogeneously with a binder to obtain a molding mixture.

As the raw material powder, metal powder, ceramic powder, carbide powder, glass powder, oxide powder and diamond powder are used. A mixed powder in which two or more of these powders are mixed as necessary may be used.

As the metal powder, for example, a powder made of Co, Cr, Fe, Cu, Zn, Ti, Ni, Ag, Sn, W, B, Mn, or an alloy thereof is used. As the carbide powder, for example, WC, TiC, CrC and the like are used, and as the ceramic powder, Zr, Si and the like are used.

The raw material powder is prepared in a size of about 1 to 20 μm. In the case of a larger size, the sintering property and the injection moldability are generally relatively poor and the strain due to shrinkage is large. It is difficult to uniformly mix with and the price is relatively high. However, the size of the raw material powder may be nano-size if the characteristics of the material is prioritized without considering the price, may be a size of several tens to several hundred μm in some cases.

As the binder, a conventional organic binder selected according to the raw material powder is used. For example, paraffin wax, vinyl acetate, polyolefin, ethylene vinyl acetate, and the like are used. Particularly, as the water-soluble binder, polyethylene glycol, polypropylene glycol, polyvinyl Alcohol and the like are used, and polystyrene, polyethylene and the like are used as the water-insoluble binder.

Each raw material powder and the binder are homogeneously mixed at a ratio of 40 to 60 vol% of the raw material powder and the remaining amount of binder, and then mixed for 2 to 3 hours at a temperature condition of 80 ~ 150 ℃. This mixing can be accomplished using, for example, a conventional double planetary mixer or the like.

When the raw material powder is less than 40 vol%, the fluidity during injection is good, but it takes a long time when degreasing. When the raw material powder is more than 60 vol%, the molding may not have sufficient strength during injection. .

In addition, when the mixing is performed at a temperature lower than the above conditions or for a short time, the binder may not be mixed with sufficient fluidity. If the mixing is performed at a temperature above or above the above conditions, the binder may be degreased during mixing. Therefore, it is preferable to maintain the above mixing conditions.

As a result of the mixing, a molding mixture in which the raw material powder particles are wrapped in a binder is obtained. The molding mixture may form a lump by mutual bonding of the binders, but may be in powder form by a slight pressing force. Easily shredded.

Next, the obtained molding mixture is injected into a mold using a powder injection molding apparatus to obtain a molded article having a predetermined shape.

The powder injection molding apparatus of this embodiment uses a material having a conventional configuration provided with a hopper for raw material supply, a plasticizing cylinder, an injection screw, a mold, and the like.

This injection is preferably made at an injection pressure of 1000 ~ 3000 psi in a state where the molding mixture is heated to 150 ~ 500 ℃.

If the injection temperature is lower than 150 ℃ may not be uniform injection molding because the fluidity of the molding mixture is not good, if higher than 500 ℃ may cause the evaporation of the binder, it is preferable to inject under the above conditions.

In addition, when the injection pressure is lower than 1000 psi, the molding mixture may not be injected smoothly from the nozzle, when the injection pressure is higher than 3000 psi, the powder injection molding apparatus may be overloaded, it is preferable to inject under the above conditions.

In particular, the injection is preferably performed by a three-point heating method under the above conditions. The three-point heating method controls heating and flow at at least three points such as an inlet, a break point, and an outlet through which the molding mixture is injected during the injection molding machine. This is how it is done.

Next, after attaching a joining material to the joining object surface of a molded object, an object is joined through a joining material.

In this step, another molding obtained through the same process is bonded to the molding obtained through the above-described process to form a material.

In this way, two or more moldings made of dissimilar materials can be made into one composite layer material, or two or more moldings can be made into one material by joining two or more moldings that are difficult to obtain in one injection molding. Will be.

For example, in the case of mechanical parts, the parts of the body are made of a molding of a general metal material by using powder injection molding, and the parts which are rubbed with other parts are made of a molding of a mixed material to which the wear-resistant powder is added, and both sides are joined. To form the final product.

In another aspect, as well as moldings of the same type, metal members or ceramic members, metal-glass mixed sintered bodies, etc., manufactured in a predetermined form may be bonded to the moldings to form one composite layer material.

For example, in the case of a cutting bite, the main body is made of ordinary carbon steel and the cutting part is made of cemented carbide. At this time, the main body is made of a general carbon steel material through a general metal processing, the cutting portion can be made into a final product shape by joining both sides in a state made of cemented carbide material by powder injection molding.

To this end, in this embodiment, a brazing method is applied to join another molding or metal member to the powder injection molded green body.

Brazing method is a method of joining both base materials to be joined without melting, by applying brazing paste to the surface to be joined of both base materials, melting the filling metal in the brazing paste, and filling metal by diffusion phenomenon. The atom or molecule of is moved to the base material on both sides to cause the bonding between the base material. Such brazing methods include indirect brazing and direct brazing.

In general, both materials may be dissimilar metals such as aluminum-stainless steel, or dissimilar materials such as metal-ceramic.

In this embodiment, a green body obtained through the above-described process is used as at least one base material.

A brazing paste is used as the bonding material, and the brazing paste is applied to and adhered to the bonding target surface of the molded product.

The main component of the brazing paste may be appropriately determined according to the components of the molding and the bonding object. For example, when the temperature condition of the final sintering treatment is set to 500 to 1000 ° C., an Ag-based brazing paste is used. In the case of 1500 ° C, a Ni-based brazing paste is used. In addition, a brazing paste containing a ferrite-based or other carbide or oxide-based main component may be used.

Exemplary brazing paste is a mixed powder with a fine metal or ceramic mainly composed of Ag or Ni, and an aqueous or non-aqueous solvent, a binder, a plasticizer, a dispersant, a defoamer. It has a slurry form which mixed surfactant, etc. through an appropriate process.

For example, commercialized brazing pastes include various kinds of additives selected in consideration of the main component and the purpose of brazing. As a solvent, MEK (metal-ethyl-ketone), TCE (trichloroethylene), and the like are used. As vinyl butyral), an acryl binder, and a plasticizer, components, such as PEG (Polyethylene Glycol) and BBP, are used.

As an example of the manufacturing process, a solvent and a dispersant are added to a mixed powder with a fine metal or ceramic, which is a main component such as Ag or Ni, and first mixed by using ball milling. A binder, a plasticizer, and an antifoamer are further added thereto, followed by secondary mixing using ball milling, followed by stirring and defoaming. Through this process, a low viscosity brazing paste mainly containing Ag or Ni is obtained.

In this step, the brazing paste applied to the surface to be bonded to the molding is subjected to a heat treatment effect similar to the high temperature heat treatment in the general brazing method through the sintering step described below. As a result, the molding and the bonding target are integrally combined to form a composite Layer material.

On the other hand, the molded article and the object to be bonded thereto may be selected from various materials according to the use of the final product, etc., and may be composed of various layers. .

Next, the joined body of the molded object and the object is degreased.

Degreasing is a process of removing the binder added to the mutual binding of the raw material powder in the molding, in this embodiment degreasing is carried out by pyrolysis in a vacuum furnace, in particular in the temperature rise of 20 ~ 35 ℃ / hr from 80 ℃ to 600 ℃ By heating at a rate.

Looking at the degreasing process in more detail, a passage for debinding the binder is formed in the injection molding in the initial temperature rise temperature range, degreasing of the binder for low temperature is performed in the intermediate temperature range, degreasing of the binder for high temperature is performed sequentially in the high temperature range. . In this respect, it is preferable that degreasing is performed within the above temperature range.

In addition, from the technical aspect of the degreasing process, it is preferable that the temperature increase rate is low, but if the temperature increase rate is too low, the high temperature atmosphere of the vacuum furnace must be maintained for a long time, and as a result, the production cost is increased and the operating time is increased. It is desirable in terms of actual manufacturing to keep the rate of heating as high as possible under the conditions achieved. However, if the temperature increase rate is excessively high, since the warping and internal cracks, pores, swelling phenomenon may occur when degreasing, degreasing is preferable as the temperature increase rate.

The temperature increase rate of the vacuum furnace has an average meaning, and may be a method of continuously raising the temperature at a constant rate during the degreasing process, and if necessary, the process may be performed to include a process of temporarily stopping the temperature increase and maintaining a fixed temperature in the middle. It can also be operated.

Meanwhile, in such a degreasing process, the degreasing process of the solvent extraction method may be further performed. The solvent extraction method is a method of eluting and removing the binder by immersing the injected molding in a solvent.

At this time, the solvent used may vary depending on the type of the binder, for example methanol, butanol, hexane, dichromemethanol and the like can be used.

When such a solvent extraction degreasing step is added, it is preferable to pass it as a previous step of the pyrolysis degreasing step.

Next, the degreased bonded body is sintered in a sintering furnace.

Sintering is performed under a reducing hydrogen atmosphere (or nitrogen atmosphere), but may be performed in a separate sintering furnace, but the sintering furnace may be configured by injecting hydrogen gas into a vacuum furnace in which degreasing is completed. When sintering is carried out under such a reducing hydrogen atmosphere, oxygen remaining in the molding is removed, so that voids are removed to obtain a dense structure, and the oxidation of the molding is also prevented.

This step basically has the meaning of sintering heat treatment in which the powder particles in the molding obtained by powder injection molding adhere to each other and harden integrally, but at the same time, the brazing heat treatment in which the objects joined to the molding by brazing paste are integrally bonded. It also has meaning. That is, not only the sintering of the molded product itself but also the brazing joining of the object are performed by this sintering process simultaneously.

When the raw powder is composed of metal powder or diamond powder, or a mixture thereof, the raw powder is sintered at a first temperature of 500 to 1300 ° C., and the raw powder is composed of ceramic powder or carbide powder, glass powder, oxide powder, or a mixture thereof. Is sintered under a second temperature condition of 1000 to 1500 ° C.

When the raw material powder is a mixed powder of the powder at the first temperature condition and the powder at the second temperature condition, the raw powder is sintered at a third temperature condition of 500 to 1300 ° C.

At temperatures lower than these conditions, the powder may not have sufficient hardness even if the powder is sintered, and at higher temperatures, the sintered powder may be thermally damaged, so it is desirable to maintain such temperature conditions.

At this time, the sintering process is performed for a predetermined time set according to the characteristics of each raw material powder or molding under the above temperature conditions. Such sintering time may be, for example, a time of about several minutes, or may be about 2 to 3 hours depending on the characteristics of the raw material powder or the molding.

In the said process, in order to make the bonding property of a molding object and object more favorable, you may pressurize at predetermined pressure as needed.

Upon completion of this sintering, various types of composite layer materials can be obtained, as illustrated in FIG. 9.

9 (a) to 9 (d) show a case where various materials corresponding to A to E are formed as one composite layer material via an intermediate bonding layer.

9 (d), for example, may be configured in the form of A (low cost material) -B (expensive material), may be configured in the form of A (soft material) -B (hard material), Various material layers may be formed as one composite layer material, such as may be configured in the form of A (metal) -B (ceramic).

In particular, the brazing method of the present embodiment can be usefully applied when the joining target surface has a complicated or irregular shape as shown in FIG. 9 (d).

Such composite layer materials are required in terms of function and price, for example, watch bands, office equipment parts, electronic parts, parts of military equipment, parts in the semiconductor field, parts in the automotive field, and parts for machine tools. It can be used in various fields.

An embodiment of another aspect of the present invention will be described.

Figure 3 is a schematic diagram showing a case of manufacturing the bonding material according to an embodiment of the present invention by a tape casting process.

In this embodiment, a bonding material in the form of a slurry similar to the brazing paste is prepared, which is further subjected to a tape casting process to make a green tape, and a molding is bonded using the same.

For example, a slurry 10 in which an aqueous or non-aqueous solvent and a binder, a plasticizer, a dispersant, an antifoaming agent, a surfactant, and the like are mixed in a mixed powder with a fine metal or ceramic which is a main component such as Ag or Ni through an appropriate process. Prepare.

The slurry 10 is charged into a reservoir 110 of the tape casting apparatus, and the doctor blade 120 is finely adjusted so that the appropriate amount of the slurry 10 is continuously discharged constantly.

In the lower portion of the slurry 10 discharged through the doctor blade 120, for example, a carrier film 40 made of a thermosetting film made of PET is simultaneously moved at a constant speed. The release agent is evenly applied to the surface of the carrier film 40 so that the attached substance is well separated.

Through this process, the slurry 10 discharged by the doctor blade 120 is applied to the upper portion of the carrier film 40 in a predetermined thickness (for example, 30 to 50 μm) to have a form 20 attached thereto. do.

Then, the slurry 10 attached to the upper portion of the carrier film 40 by the hot air discharged from the hot air means 130 is dried, and is easily separated from the carrier film 40 by the release agent.

The slurry 10 thus dried is manufactured as the green tape 30 cut into a predetermined width and length by the cutting means 140.

In this way, the green tape thus manufactured is laminated and adhered to the surface to be joined of the molded article produced by powder injection molding, and then another molded article, a metal member, a ceramic member, a metal-glass mixed sintered compact, and the like are bonded to each other to form a single piece. It will be made in the form of a composite material.

Thereafter, the final product is obtained through the same type of degreasing treatment and sintering treatment as in the above-described embodiment.

The main component of the green tape may be appropriately determined according to the components of the molding and the bonding object. For example, when the temperature condition during the final sintering treatment is 500 to 1000 ° C, an Ag-based green tape is used. In this case, Ni-based green tape is used. In addition, a brazing paste containing a ferrite-based or other carbide or oxide-based main component may be used.

Such a tape casting of the present embodiment can be particularly useful for joining the case where the surface to be joined is flat and multilayered as shown in FIG. 9C.

<Example 1>

A) Co-Fe-based powder, B) another Co-Fe-based powder, C) WC-Co-based powder, and D) WC-Co-Fe-based powder each having a size of 1 to 5 탆 as a raw material powder were prepared. Low density polypropylene (LDPE), high density polypropylene (HDPE), ethylene vinyl acetate (EVA), wax (WAX), stearic acid (Stearic Acid) were prepared.

Each prepared powder was mixed with the binder in a ratio of 1: 1, and mixed for 2 hours while heated to a temperature of 120 ℃ using a double planetary mixer, the molding mixture corresponding to the A) ~ D) Were obtained respectively.

Next, using a powder injection molding apparatus, each of the moldings consisting of the molding mixture of A) to D) was injected.

Injection was achieved by a three-point heating method, with all three points at an injection pressure of 2000 psi while being maintained at temperatures below 300 ° C.

Next, Ag-based brazing pastes and Ni-based BNi ₂ -based brazing pastes were prepared.

The prepared Ag-based brazing paste is composed of a main component at a ratio as shown in the following table, and a solvent, a dispersant, a binder, a plasticizer, an antifoaming agent, and the like are added to have a low viscosity slurry.

ingredient Ag Cu Sn ratio(%) 60 30 10

The prepared BNi ₂ brazing paste is composed of a main component at a ratio in the ratio of the following table, and components such as a solvent, a dispersant, a binder, a plasticizer, and an antifoaming agent are added thereto to have a slurry having a low viscosity.

ingredient Ni Cr Fe B Si ratio(%) 82.4 7 3 3.1 4.5

Next, after applying the brazing paste to the bonding target surface of the molding as shown in the following table, another molding was bonded.

First molding Second molding Brazing paste Inventive Example 1 A B Ag Inventive Example 2 A B BNi ₂ series Inventive Example 3 A C Ag Inventive Example 4 A D Ag

Next, degreasing treatment was performed on the molded article by pyrolysis using a vacuum furnace. The vacuum furnace in the room temperature was heated to raise the temperature, but the average temperature increase rate during the degreasing treatment was 30 ° C / hr, and the following temperature maintenance process was included during the temperature increase.

i) hold at 130 ° C. for 1 hour

ii) hold at 300 ° C. for 1 hour

iii) hold at 420 ° C. for 2 hours

Next, the molded product was sintered through a process subsequent to the degreasing step.

To this end, the vacuum furnace was continuously heated even after the degreasing step was completed, and hydrogen gas was injected into the inside of the vacuum furnace to form a reducing hydrogen atmosphere. In this state, the mixture was maintained at a temperature of 1000 ° C. for 2 hours and then cooled in a furnace.

4A and 4B are tissue photographs and enlarged photographs of Inventive Example 1, FIGS. 5A and 5B are tissue photographs and enlarged photographs of Inventive Example 2, FIG. 6 is a tissue photograph of Inventive Example 3, and FIG. 7 is a tissue of Inventive Example 4 It is a photograph.

According to the structure | tissue photograph, it is confirmed that each invention example is joined firmly through the intermediate | middle bonding layer, and forms one composite layer material.

<Example 2>

A) Co-Fe-based powder and B) another Co-Fe-based powder having a size of 1 to 5 μm were prepared as raw material powders, and powder injection molding was performed in the same manner as in Example 1 to obtain respective moldings.

Next, a green tape obtained by tape casting the ferrite slurry was prepared. The prepared ferritic green tape includes the main component powder made of the following ratio.

(Fe ₂ O ₃ : NiO ₂ : ZnO = 1: 0.5: 0.5): Ag = 95 (wt%): 5 (wt%)

A solvent, a dispersing agent, a binder, a plasticizer, an antifoamer, etc. are added to this, and tape-cast. [Main component: additive component] was mixed at a ratio of [6: 4].

Next, the green tape was laminated and adhered to the joining target surface of the molded product.

Then, degreasing treatment and sintering treatment were performed in the same manner as in Example 1 using a vacuum furnace to finally obtain Inventive Example 5. 8 is a tissue photograph of Inventive Example 5. FIG.

According to the structure | tissue photograph, also in the case of invention example 5, it is confirmed that it joins firmly through the intermediate | middle bonding layer, and forms one composite layer material.

The present invention described above can be embodied in many different forms without departing from the spirit or main features thereof. Therefore, the above embodiments are merely examples in all respects and should not be construed as limiting.

The present invention, while manufacturing a variety of materials such as metal or ceramic as a single material in the form of a composite layer, it is implemented through a simple process.

In addition, since the present invention takes a method of forming a molding by applying a powder injection molding method and bonding the object by applying brazing or tape casting, the conventional powder metallurgy is difficult to manufacture or requires a high cost of complex shape It allows mass production of composite layer materials at low cost.

Claims (12)

Mixing the raw powder homogeneously with a binder to obtain a molding mixture, and injecting the obtained molding mixture into a mold by using a powder injection molding apparatus to obtain a molding having a predetermined shape; Attaching a bonding material including a brazing paste or a green tape to the bonding object surface of the molding, and then bonding the object through the bonding material; Degreasing the conjugate of the molding and the object; Sintering the degreasing treatment in the sintering furnace; a method of manufacturing a composite layer material comprising the. The method of claim 1, The raw powder is selected from the group consisting of metal powder, ceramic powder, carbide powder, glass powder, oxide powder, diamond powder or mixtures thereof. The method of claim 1, The binder is an organic binder, the molding mixture is a method for producing a composite layer material, characterized in that consisting of the raw material powder 40 ~ 60 vol% and the remaining amount of the binder. The method of claim 3, The raw material powder and the binder is a method for producing a composite layer material, characterized in that homogeneously mixed for 2 to 3 hours at a temperature condition of 80 ~ 150 ℃. The method of claim 3, The injection method is a method for producing a composite layer material, characterized in that the injection pressure of 1000 ~ 3000 psi in a state where the molding mixture is heated to 150 ~ 500 ℃. delete delete The method of claim 1, The object is a molded product obtained by mixing a raw material powder with a binder homogeneously to obtain a molding mixture, and injecting the obtained molding mixture into a mold by using a powder injection molding apparatus. Manufacturing method. The method of claim 1, The said object is any one of a metal member, a ceramic member, and a metal-glass mixed sintered compact, The manufacturing method of the composite layer material characterized by the above-mentioned. The method of claim 3, The degreasing is carried out in a pyrolysis method in a vacuum furnace, the method of producing a composite layer material, characterized in that the heating is carried out at a temperature increase rate of 20 ~ 35 ℃ / hr from 80 ℃ to 600 ℃. The method of claim 2, The sintering is carried out in a reducing hydrogen atmosphere or a nitrogen atmosphere, If the raw material powder is made of metal powder or diamond powder, mixed powder thereof, the first temperature condition of 500 ~ 1300 ℃, When the raw material powder is made of ceramic powder or carbide powder, glass powder, oxide powder, and mixed powder thereof, the second temperature condition of 1000 to 1500 ° C, When the raw material powder is a mixed powder of the powder of the first temperature condition and the powder of the second temperature condition, the composite layer material is produced for a predetermined time while the third temperature condition of 500 ~ 1300 ℃ is maintained Way. A composite layer material prepared according to the method of claim 1.

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