KR20170081382A - Surface treatment method of metal or ceramic using carbonized layer production - Google Patents

Surface treatment method of metal or ceramic using carbonized layer production Download PDF

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KR20170081382A
KR20170081382A KR1020160000341A KR20160000341A KR20170081382A KR 20170081382 A KR20170081382 A KR 20170081382A KR 1020160000341 A KR1020160000341 A KR 1020160000341A KR 20160000341 A KR20160000341 A KR 20160000341A KR 20170081382 A KR20170081382 A KR 20170081382A
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South Korea
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metal
ceramic
surface treatment
layer
treatment method
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KR1020160000341A
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Korean (ko)
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KR101782815B1 (en
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이대길
오승진
김민국
이동영
최재헌
남수현
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한국과학기술원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/04—Time

Abstract

The present invention relates to a method for treating a surface of a metal or ceramic using a carbonized layer. More particularly, the present invention relates to a surface treatment method characterized in that an organic layer is formed on the surface of a metal or a ceramic and a carbonization layer is formed through a carbonization process of the organic layer, thereby improving adhesion of the metal or ceramic.
The carbonized layer formed on the metal or ceramic surface by the surface treatment method of the present invention can maintain stable and high adhesive force at room temperature and high temperature, and it is possible to reliably bond the metal material and the ceramic base material in a wide temperature range, It is possible to design the structure to be safe, and it is possible to show the applicability to a field requiring high-temperature adhesion such as a fire retardant or an insulating structure.

Description

TECHNICAL FIELD [0001] The present invention relates to a surface treatment method of metal or ceramic using carbonized layer,

The present invention relates to a method for treating a surface of a metal or ceramic using a carbonized layer. More particularly, the present invention relates to a surface treatment method characterized in that an organic layer is formed on the surface of a metal or a ceramic and a carbonization layer is formed through a carbonization process of the organic layer to improve the adhesion of the metal or ceramic.

The combination of materials in various fields such as construction, automobile, aircraft, and ship is widely used such as mechanical bonding such as bolting and riveting, adhesion and welding. The bonding is advantageous in that the bonding site of the material is thin and the load is widely dispersed in comparison with the mechanical bonding, and it is used in fields where it is difficult to apply a mechanical bonding method such as an aircraft or a ship.

Since the bonding performance greatly changes according to the surface precision of the material, the surface treatment of the material is performed before bonding. Examples of the surface treatment method of the material for improving the adhesion include a mechanical method such as sandpaper treatment or sand blast which mechanically increases the roughness of the surface to widen the bonding surface area, A chemical method has been developed for modifying the surface by using an acid or the like. In addition, there have been developed a method of improving the adhesion of an adhesive interface by using a primer, a coupling agent, etc., and a method of using a plasma or the like (Refer to Patent Document 1 and Non-Patent Document 1).

In the surface treatment method as described above, the surface treatment method for mechanically improving the adhesion area has limitations in improving the adhesive force in the case of metals or ceramics having low surface energy, and the surface of the material is greatly damaged or deformed. It is known that it is not suitable for a material weak in materials or deformation, and a chemical treatment or a surface treatment method using a coupling agent is disadvantageous in that the process is complicated and high cost is required. In addition, the mechanical and chemical surface treatment method has a remarkable deterioration in adhesion performance at a high temperature compared with room temperature, and thus can not be used in fields requiring high temperature adhesion. Therefore, it is required to develop a surface treatment method which requires a simple process, low cost, and maintains an adhesive force even at a high temperature.

Under these circumstances, the inventors of the present invention have confirmed that the adhesion of metal or ceramics can be improved by forming a carbonized layer on the surface of a metal or a ceramic, and the adhesion can be stably maintained even at a high temperature.

Korean Patent Publication No. 10-2013-0091686.

 Seo, Seung-Ho, et al., Transactions of the Korean Society of Mechanical Engineers, Vol. B, 2011, 35 (5), 445-450.

An object of the present invention is to provide a method for treating a surface of a metal or a ceramic using the formation of a carbonized layer. The present invention aims to improve the adhesion of metals or ceramics which are difficult to bond due to low surface energy by forming a carbonized layer on the surface of metal or ceramic. It is another object of the present invention to provide a surface treatment method in which adhesion performance of a metal or a ceramic is maintained even at a high temperature.

In order to achieve the above object, one aspect of the present invention provides a method for surface treatment of a metal or ceramic using the formation of a carbonized layer, comprising the steps of:

1) applying an organic material to the surface of a metal or ceramic;

2) forming an organic layer through a curing process of the organic material; And

3) forming a carbonized layer through a carbonization process of the organic layer;

The step of forming the carbonized layer in the method of surface treatment of metal or ceramic according to the present invention may be carried out at a temperature of 700 to 1000 占 폚 using a flame treatment, a heat treatment, an electromagnetic wave heating treatment or a laser energy heating treatment of an organic layer formed on the surface of a metal or ceramic For 5 seconds to 10 seconds.

The carbonized layer formed on the metal or ceramic surface by the surface treatment method of the present invention can maintain stable and high adhesive force at room temperature and high temperature, thereby enabling reliable bonding of the metal material and the ceramic base material in a wide temperature range, It is possible to design the structure as a safe structure. It may also indicate applicability in fields requiring high temperature adhesion such as fire retardants or adiabatic structures.

FIG. 1 is a flowchart illustrating a surface treatment method of a metal or ceramic according to the present invention.
2 is a cross-sectional view showing the surface of a metal or ceramic surface-treated by a surface treatment method of metal or ceramic according to the present invention.
3 is a schematic view for explaining a step of forming a carbonized layer in a surface treatment method of a metal or ceramic according to the present invention.
FIG. 4 is a graph showing the results of measurement of the adhesion force according to the process time of the carbonization process in the surface treatment method of metal or ceramics according to the present invention.
FIG. 5 is a graph showing the results of measurement of adhesion strength of a metal or ceramic surface-treated by a surface treatment method of metal or ceramic according to the present invention before and after high-temperature treatment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, but the present invention is not limited to or limited by the embodiments. In describing the embodiments, a detailed description of well-known functions or constructions may be omitted so as to clarify the gist of the present invention. Like reference numerals refer to like elements throughout the specification.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and examples taken in conjunction with the accompanying drawings.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

Throughout this specification, the term "combination thereof" included in the expression of the machine form means one or more combinations or combinations selected from the group consisting of the constituents described in the expression of the machine form, And the like.

Hereinafter, a surface treatment method of a metal or ceramic using the formation of the carbonized layer according to the present invention will be described in detail.

The method for surface treatment of a metal or ceramic using the formation of a carbonized layer according to the present invention comprises the steps of (1) applying an organic substance to the surface of a metal or ceramic (10); 2) forming the organic layer 20 through the curing process of the organic material (S30); And 3) forming a carbonized layer 30 through a carbonization process of the organic layer 20 (S40). In addition, the method may further include a step S10 of cleaning the metal or ceramic 10 using ultrasonic waves before the step S20 of applying the organic material (see FIGS. 1 to 3).

The cleaning step (S10) of the metal or ceramic (10) is a step of cleaning the metal or ceramic surface by using ultrasonic waves, and may be performed by ultrasonic cleaning in an ultrasonic washing machine with acetone or ethanol for 10 minutes to 15 minutes have. Also, the surface roughness of the metal or ceramic 10 may be controlled to improve the bonding strength between the carbonized layer 30 and the adhering agent 50.

The applying step S20 of the organic material on the metal or ceramic 10 is a step of applying an organic material to the surface of the metal or ceramic 10. The organic material may be applied by a knife coating method, a roll coating method, a spray coating method , A gravure coating method, a curtain coating method, a comma coating method, or a lip coating method may be appropriately applied according to the viscosity of an organic material, but the present invention is not limited thereto. In addition, the adhesive force to the surface of the metal or ceramics 10 can be improved through the pressing process after applying the organic material.

The organic material may be a polymer resin, an oil, a carbohydrate, or a combination thereof, but is not limited thereto. The polymer resin may be at least one selected from the group consisting of a phenol resin, an epoxy resin, a urethane resin, a polyester resin, a polyurethane resin, a polyvinyl chloride resin, But are not limited to, Urea resin, Polyethylene resin, and Acrylic resin. Non-limiting examples of the oil include semi-drying oils such as soybean oil and sesame oil, and non-drying oils such as castor oil and olive oil. Non-limiting examples of the carbohydrate include glucose, sucrose, maltose, Or starch.

The step of forming the organic layer 20 is a step of forming the organic layer 20 through a curing process of an organic material coated on the surface of the metal or the ceramic 10, The organic layer 20 may be formed by curing the applied organic material in an oven at 140 to 200 ° C for 20 to 60 minutes.

The organic layer 20 may be formed to a thickness of 5 to 10 mu m. If the thickness of the organic layer 20 is less than 5 탆, it may be difficult to improve the adhesion improving effect by forming the carbonization layer 30. If the thickness is more than 10 탆, the organic material 20 may aggregate during the curing process, The surface may become uneven or defects may occur.

The step S40 of forming the carbonized layer 30 is a step of forming the carbonized layer 30 through the carbonization process of the organic layer 20 formed on the surface of the metal or the ceramic 10, ) May be heated at a temperature of 700 to 1000 ° C for 5 seconds to 10 seconds to form the carbonized layer 30.

If the temperature of the carbonization process is less than 700 ° C., it may be difficult to form the carbonization layer 30. If the temperature is more than 1000 ° C., the metal or ceramic 10 may be annealed or partially melted, . If the time of the carbonization process is less than 5 seconds, it may be difficult to achieve uniform carbonization layer 30 formation and adhesion improving effect by formation of carbonization layer 30, and if it exceeds 10 seconds, dehydrogenation reaction the mechanical properties of the carbonized layer 30 may be deteriorated by the dehydrogenation reaction and the bonding strength with the metal or the ceramic 10 may be reduced and the carbonized layer 30 may be decomposed to decrease the adhesive strength.

The thickness of the carbonized layer 30 formed through the step S40 of forming the carbonized layer 30 may be 5 to 10 mu m. The carbonized layer 30 may be formed to a thickness of 5 to 10 탆. When the thickness of the carbonized layer 30 is less than 5 탆, it may be difficult to improve the adhesion of the carbonized layer 30. When the thickness of the carbonized layer 30 exceeds 10 탆, the surface of the carbonized layer 30 may become uneven or defective defect is generated, the bonding strength is lowered and thus the adhesive force can be reduced.

The carbonization process may be performed by a flame treatment, a heat treatment, an electromagnetic wave heating treatment, or a laser energy heating treatment, but is not limited thereto.

3, the step of forming a carbonized layer (S40) in an embodiment of the present invention is a step of forming a carbonized layer in an organic layer 20 formed on the surface of a metal or ceramic 10 by using a spark from 700 to 1000 占 폚 The carbonized layer 30 can be formed by performing the flame treatment. The gap between the metal or ceramic 10 and the flame can be maintained at about 5 mm. After the flame surface treatment is completed, the metal or ceramic 10 is cooled by natural cooling or air cooling so as not to weaken the mechanical properties of the metal or ceramic Process can be performed.

The carbonized layer 30 formed on the surface of the metal or ceramic according to an embodiment of the present invention is formed by the organic layer 20 being condensed on the surface of the metal or ceramic 10 through a high temperature carbonization process, The adhesive force to the ceramic 10 is excellent and the surface energy of the metal or the ceramic 10 is higher than that of the ceramic 10, By forming the optimized carbonized layer 30 through this principle, the adhesion can be greatly improved as compared with the metal or ceramic 10 which has not been subjected to the surface treatment.

Further, the carbonized layer 30 has a carbon-carbon bond structure such as diamond or graphite, and is stable even at a high temperature. Since the chemical change is small, high adhesion can be maintained even in a high temperature process. In addition, the carbonized layer 30 formed through the carbonization process can protect the adherend 50 adhered on the carbonized layer 30 by decreasing the heat transfer and the propagation speed of the flame when exposed to high temperatures. In the case of using a primer or a coupling agent among the conventional surface treatment methods, most of the polymers have a problem that adhesion is greatly reduced due to lowering of physical properties at a high temperature by applying a polymer material. However, The possibility of application at high temperature can be improved through the treatment method.

That is, the surface treatment method of metal or ceramics using the formation of the carbonized layer 30 of the present invention is characterized in that the adhesion of the metal or ceramic 10 is improved. 2, when an adhesive layer (adhesive agent and adherend) is formed on the carbonized layer 30 formed on the surface of the metal or the ceramic 10, The adhesive performance of the adhesive 40 and the adhesive 50 on the layer 30 can be improved.

Hereinafter, the surface treatment method using the formation of the carbonized layer of the present invention and the characteristics of the surface-treated metal or ceramics will be described with reference to examples.

Example  One : Of the carbonized layer  Surface treatment of metals through formation

A copper foil was added to the ultrasonic cleaning machine and subjected to degreasing cleaning by ultrasonication using an acetone solvent for 10 minutes. Thereafter, phenol resin was applied to the surface of the cleaned copper foil to a thickness of 10 mu m and then cured in an oven at 160 DEG C for 30 minutes. After the curing process was completed, the surface of the cured copper foil was carbonized by applying a flame of 900 DEG C for 5 seconds to 15 seconds, and then slowly cooled in the air.

Example  2: Analysis of adhesion of surface treated metal

In order to analyze the adhesion of the surface-treated metal with the carbonized layer prepared in Example 1, the strength of the joint was measured through a single lap shear test. A 0.1 mm thick copper foil was used as the adherend and aluminum foil was used as a backing to prevent the thin copper foil from being subjected to peel stress. The specimens were of uniform size (150 mm x 25 mm x 3 mm) with an aluminum plate (150 mm x 25 mm x 0.1 mm = width x length x thickness) backed up according to ASTM D 1002-10 and 5868-01 specifications. Width x length x thickness) of copper foil was applied as an adherend, and the two pieces were overlapped by an area of 25 mm x 25 mm, and adhesive strength was measured by applying an adhesive material between the joints. The joints were evenly coated with a uniform sized (25 mm x 25 mm) PTFE tape with a 15 mm x 15 mm hole and the PTFE tape was applied to the adhesive thickness guide And the thickness of the adhesive layer was kept constant at 0.165 mm.

The adhesion was measured before the flame surface treatment was performed during the carbonization process and after the flame surface treatment was performed for 5 to 15 seconds, and the burned metal was subjected to the burning treatment for 5 to 15 seconds on the carbonized layer formed metal. And the adhesive strength maintenance effect by the high temperature treatment was analyzed. The specimens were pulled at a rate of 1.0 mm / min to measure the shear strength.

From the analysis results of the adhesion of the metal on which the carbonized layer is formed, it was confirmed that the adhesion of the metal can be improved by forming the carbonized layer, and in the case of the metal in which the carbonated layer is formed, excellent adhesion can be maintained even at high temperature treatment 4 and FIG. 5).

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

10: metal or ceramic
20: Organic layer
30: carbonized layer
40: Adhesive
50: Adhesive

Claims (6)

A method for surface treatment of a metal or ceramic using the formation of a carbonized layer, comprising the steps of:
1) applying an organic material to the surface of a metal or ceramic;
2) forming an organic layer through a curing process of the organic material; And
3) forming a carbonized layer through a carbonization process of the organic layer; The method of claim 1, wherein the organic material is selected from the group consisting of a phenol resin, an epoxy resin, a urethane resin, a polyester resin, a polyurethane resin, A polymer resin selected from the group consisting of polyvinyl chloride resin, urea resin, polyethylene resin and acrylic resin; An oil selected from the group consisting of soybean oil, sesame oil, castor oil, and olive oil; Or a carbohydrate selected from the group consisting of glucose, sucrose, maltose and starch. The surface treatment method according to claim 1, wherein the organic layer is formed to a thickness of 5 to 10 탆. The surface treatment method according to claim 1, wherein the organic layer is heated at a temperature of 700 to 1000 占 폚 for 5 seconds to 10 seconds. The surface treatment method according to claim 1, wherein the carbonized layer is formed to a thickness of 5 to 10 탆. The surface treatment method according to claim 1, wherein adhesion of the metal or ceramic is improved by the surface treatment method.
KR1020160000341A 2016-01-04 2016-01-04 Surface treatment method of metal or ceramic using carbonized layer production KR101782815B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210097389A (en) * 2020-01-30 2021-08-09 송현주 System and method for recommending travel itinerary based on real-time user environment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210097389A (en) * 2020-01-30 2021-08-09 송현주 System and method for recommending travel itinerary based on real-time user environment

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