JP3535470B2 - Manufacturing method of functionally graded material - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing a functionally gradient material whose composition or structure changes continuously, stepwise or intermittently.

[0002]

2. Description of the Related Art As a conventional method of manufacturing a functionally graded material, for example, a method (first manufacturing method) is known in which thin plates of which composition is changed little by little are sequentially laminated and integrated.
As another manufacturing method (second manufacturing method), a raw material slurry having a composition different from the raw material slurry is added to a container containing a raw material slurry having a certain composition and stirred to adjust the composition of the slurry in the container. A method of stacking (filling) these while changing them is known.

[0003]

However, in the case of the first manufacturing method described above, a functionally gradient material whose composition changes stepwise can be obtained, but a functional gradient material whose composition changes continuously or intermittently. It is impossible to make the material.

On the other hand, in the case of the second manufacturing method, it is possible to produce a functionally gradient material whose composition continuously changes, but it is difficult to change the gradient pattern in various ways such as increasing the compositional change. However, there is a drawback that the degree of freedom of composition change is low.

The present invention has been made by paying attention to the problems existing in the prior art as described above. It is an object of the present invention to provide a method for producing a functionally gradient material, which can obtain a functionally gradient material whose composition or structure changes in various gradient patterns.

[0006]

In order to achieve the above object, the invention according to claim 1 provides a functionally gradient material for producing a functionally gradient material whose composition or structure changes continuously, stepwise or intermittently. A method for producing a material, wherein the raw material slurry having two or more kinds of fluidity is kept constant at the sum of the feed rates of the respective raw material slurry, and the ratio of the respective raw material slurry is continuously, stepwise or intermittently. And a step of supplying the mixed slurry to the mixing space while changing it, a step of mixing the raw material slurry in the mixing space to obtain a mixed slurry, and a step of spray-discharging the mixed slurry and stack-filling in a molding die. , The volume of the mixing space depends on the mixing space
The mixing processing speed is almost the same as the sum of the feed rates of the raw material slurries
The gist is that the ratio of each raw material slurry when it is supplied to the mixing space while varying is maintained such that it is maintained in the mixing slurry.

[0007] According to a second aspect of the invention a method of manufacturing a gradient function material according to claim 1, in the prior SL mixing space, the mixing ball is accommodated, a mixing space shaking mixing by vibrating In addition, a mixing slurry is obtained by simultaneously performing stirring and mixing with a mixing ball, and the gist is that the raw material slurry is mixed in the mixing space to form a mixed slurry, and at the same time, the mixed slurry is spray-discharged.

[0008]

The invention according to claim 3 is the method for producing a functionally gradient material according to claim 1 or claim 2 , wherein the material is a slurry, and the material is dispersed particles. Sedimentation of
The gist is that a stabilizer for preventing separation is added. The invention according to claim 4 is the invention according to claim 1 to claim 3.
In the functionally gradient material according to any one of the items,
The slurry is obtained by mixing two types of raw material slurries.
The feed rate of each raw material slurry is one raw material
At the same time as the slurry grows linearly over time
In addition, the secondary raw material slurry was reduced linearly.
And are the gist. The invention according to claim 5 is claim 1
To the production of the functionally graded material according to claim 3.
In the method, the mixed slurry is two kinds of raw material slurry.
Of each raw material slurry obtained by mixing
In terms of speed, first increase the raw material slurry linearly.
And decrease the second raw material slurry linearly,
After that, the direction of fluctuations in the feed rate of each raw material slurry was reversed halfway.
Therefore, the raw material slurry of 1 is reduced linearly and
Of changing the raw material slurry to increase linearly
The point is to repeat the process once or twice. In claim 6
The invention described in any one of claims 1 to 3
In the method for producing a functionally graded material described above, the mixed slurry is
Is obtained by mixing two types of raw material slurries.
Regarding the supply rate of each raw material slurry,
The material slurry is constant, and then one raw material slurry is linear
Increase the secondary raw material slurry linearly
Finally, the feed rate of each raw material slurry will be constant again.
The main idea is to change it. According to claim 7,
The light is the gradient according to any one of claims 1 to 3.
In the method for producing a functionally graded material, the mixed slurry is
Obtained by mixing different types of raw material slurries,
Regarding the feed rate of the raw material slurry,
Linearly increasing the raw material slurry
The feed rate of each raw material slurry at a constant rate.
After that, finally increase the raw material slurry again linearly
In addition to linearly reducing the second raw material slurry
The point is that it is changed. The invention according to claim 8
Is the inclination according to any one of claims 1 to 3.
In the method for producing a functional material, the mixed slurry is of three types.
Obtained by mixing raw materials slurry of
Regarding the feed rate of raw slurry, one raw slurry is linear
And linearly decrease the second raw material slurry
Then, stop the supply of the second raw material slurry and replace it.
The supply of three raw materials slurry was started, and
While increasing the slurry supply rate linearly,
The summary is that the raw material slurry was changed to reduce it.
To do. The invention described in claim 9 is from claim 4 to claim 7.
In the method for producing a functionally graded material according to any one of
The mixed slurry mixes two kinds of raw material slurry.
Of the two raw material slurries
At least one of the porosity-imparting material and the sintering aid is at least one.
The main point is that one is also added. Claim 10
The invention according to any one of claims 4 to 7
In the method for producing a functionally gradient material, the mixed slurry
Is there two kinds of raw material slurry, conductive material and insulating material?
The main point is to be composed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a conceptual diagram showing an apparatus for manufacturing a functionally gradient material (hereinafter, also simply referred to as a manufacturing apparatus) in the present embodiment. As shown in the figure, this manufacturing apparatus has a pair of storage tanks 11a and 11b for storing raw material slurries A and B (materials having fluidity).
And a mixing / discharging section 13 for mixing the raw material slurries A and B supplied from the storage tanks 11a and 11b to form a mixed slurry (mixture) and at the same time spray-discharging the mixed slurry to fill the forming mold 12 in a stacked manner. Is equipped with.

The storage tanks 11a and 11b and the mixing / discharging section 13 are provided with transport pumps 14a and 14b and an opening / closing valve 15.
The raw material slurries A and B, which are connected to the storage tanks 11a and 11b by the connection pipes 16a and 16b, are supplied to the mixing / discharging unit 13 through the connection pipes 16a and 16b. It has become so.

A control unit 17 is connected to the transport pumps 14a and 14b to control the supply speed of the raw material slurries A and B supplied from the storage tanks 11a and 11b to the mixing / discharging unit 13. In the case of the present embodiment, pulsation-free uniaxial eccentric pumps are used for the transport pumps 14a and 14b, and the control unit 17 controls the rotation speed of the servomotor mounted on each uniaxial eccentric pump in an interlocking manner. The feed rates of the raw material slurries A and B are controlled so as to be linked to each other.

FIG. 1B is an enlarged half sectional view showing the mixing / discharging section 13. As shown in the figure, the mixing / discharging section 13 has a mixing space 18 for mixing the raw material slurries A and B, and the storage tanks 11a and 11b.
The raw material slurries A and B supplied from the mixing / discharging section 13 to the mixing / discharging section 13 are first supplied to the mixing space 18 and mixed.

A vibrating device (not shown) is attached to the mixing / discharging section 13, and the raw material slurries A and B are shake-mixed in the mixing space 18 by vibrating the mixing / discharging section 13 by the vibrating device. It has become. Further, since the mixing balls 19 are accommodated in the mixing space 18, the mixing balls 19 are added in addition to the shaking mixing.
The stirring and mixing by means of will also be performed at the same time.

The mixing space 18 communicates with a discharge port 20 provided at the lower end of the mixing / discharging section 13 via a communication passage 21, and is obtained by mixing the raw material slurries A and B in the mixing space 18. The mixed slurry is discharged from the discharge port 20 via the communication passage 21. Communication passage 2
Since an air supply pipe 22 extending from a compressor (not shown) is connected to the intermediate portion of 1, the mixed slurry is discharged from the discharge port 20 by compressed air supplied from the compressor via the air supply pipe 22. It is designed to be sprayed.

The volume of the mixing space 18 (volume excluding the volume of the mixing balls 19) is preferably as narrow as possible, but the mixing space 18 of the mixing slurry is preferable.
It is essential that the moving speed from the fuel cell to the communication passage 21, that is, the speed of the mixing process in the mixing space 18 is substantially the same as the sum of the supply speeds of the raw material slurries A and B. By doing so, both connecting pipes 16a, 1
The ratio of the raw material slurry A and the raw material slurry B when supplied from the 6b to the mixing space 18 can be maintained even in the mixed slurry sprayed and discharged to the molding die 12.

Next, a method of manufacturing a functionally graded material using the above manufacturing apparatus will be described. When the functionally graded material is manufactured using the above manufacturing apparatus, first, the raw material slurries A and B are put into the storage tanks 11a and 11b, respectively. Specific examples of the raw material slurries A and B include inorganic materials such as ceramics, glass, and metals, or organic materials such as synthetic resins, which are slurried with a dispersion medium (water, organic solvent). A dispersant, a stabilizer, a binder and the like are added to the raw material slurry as needed. Specific examples of the stabilizer for preventing sedimentation / separation of dispersed particles include:
Examples include alcohol-based or glycol-based organic solvents, polyvinyl alcohol, and crystalline cellulose.
Among them, crystalline cellulose is particularly preferable.

Then, the supply of the raw material slurries A and B to the mixing / discharging section 13 is started, and both slurries A and B are mixed in the mixing space 18 of the mixing / discharging section 13 to form a mixed slurry, and at the same time, spray discharging. Then, the mold 12 is stacked and filled.

The feed rate of the raw material slurries A and B at this time is, as shown in FIG. 2 (a), the feed rate of the raw material slurry A is linearly increased with the passage of time, and at the same time, the feed rate of the raw material slurry B is increased. Try to decrease the speed linearly. In this way, as shown in FIG. 2B, the concentration of the component a contained in the raw material slurry A increases linearly from one surface to the other surface, and the raw material slurry B is increased.
It is possible to obtain a molded body (gradient functional material) whose composition changes in the thickness direction such that the concentration of the component b contained in (3) linearly decreases.

The effects obtained by this embodiment will be described below. -According to the present embodiment, the volume of the mixing space 18 is
The moving speed of the mixed slurry from the mixing space 18 to the communication passage 21, that is, the speed of the mixing process in the mixing space 18 is set to be substantially the same as the sum of the supply speeds of the respective raw material slurries. Therefore, both connecting pipes 16a, 16b
The ratio of the raw material slurry A and the raw material slurry B when they are supplied to the mixing space 18 from the mixing space 18 can be maintained even in the mixing slurry sprayed and discharged to the molding die 12.
Therefore, by controlling the supply rate of each raw material slurry variously by the control unit 17, it is possible to obtain a functionally graded material whose composition changes in various gradient patterns.

The functionally gradient material having a continuously changing composition obtained by the manufacturing method of the present embodiment has no heterophasic interface inside. Therefore, the strain caused by the difference in the shrinkage ratio or the thermal expansion coefficient can be alleviated, so that the peeling or cracking caused by the strain can be suppressed.

Since the raw material slurries A and B in the mixing space 18 are mixed by shaking mixing and stirring mixing, both can be surely mixed even in a narrow mixing space 18.

By adding a stabilizer to the raw material slurries A and B, sedimentation and separation of dispersed particles can be prevented. Further, when crystalline cellulose is added as a stabilizer, it is possible to prevent sedimentation / separation of dispersed particles and at the same time impart thixotropic properties to the raw material slurries A and B, and transport the respective raw material slurries A and B. Connecting pipe 16
It is possible to prevent air from being bitten at a and 16b.

The above embodiment may be modified as follows. In the above-described embodiment, the supply speeds of the raw material slurries A and B are increased in one direction and decreased in the other direction, but the direction of change remains unchanged. You may reverse it with.

For example, as shown in FIG. 3 (a), one of the supply rates of the slurries A and B is first (raw material slurry A).
Is linearly increased and the other (raw material slurry B) is linearly decreased, and then one (raw material slurry A) is linearly decreased and the other (raw material slurry B) is linearly increased. May be. By doing so, as shown in FIG. 3A, the components a and b contained in the slurries A and B are initially one (component a) as they go from one surface in the thickness direction to the other surface. ) Linearly increases while the other (component b) linearly decreases, and then one (component a) linearly decreases and the other (component b) linearly increases. Obtainable.

Alternatively, as shown in FIG.
The supply speeds of the slurries A and B may be changed so that the mode of change of the supply speed shown in (a) is continuously repeated twice. By doing so, similarly as shown in FIG. 3B, it is possible to obtain a functionally graded material in which the manner of the change in the concentrations of the components a and b shown in FIG. 3A is continuously repeated twice. You can

In the above-described embodiment, the supply rate of each slurry A, B is constantly changed, but there may be a period in which the supply rate is maintained constant. For example, in FIG.
As shown in (a), the supply rates of slurries A and B were initially constant for both, and then one (raw slurry A)
May be linearly increased and the other (raw material slurry B) may be linearly decreased, and finally both may be changed so as to be constant. By doing this, the same as in FIG.
As shown in (a), the components a and b contained in each of the slurries A and B are initially constant as they go from one surface in the thickness direction to the other surface, and thereafter one (component a) is a straight line. It is possible to obtain a functionally graded material in which the other component (component b) linearly decreases as the temperature increases and finally both of them become constant, and the composition changes intermittently.

Alternatively, as shown in FIG. 4B, first one (raw material slurry A) is linearly increased and the other (raw material slurry B) is linearly decreased, and then both are made constant, Finally, it may be changed again so that one (raw material slurry A) is linearly increased and the other (raw material slurry B) is linearly decreased. By doing so, as shown in FIG. 4B as well, the components a and b contained in the slurries A and B are initially one (component a) as they go from one surface in the thickness direction to the other surface. ) Linearly increases and the other (component b) linearly decreases, then both are constant, and finally one again (component a) linearly increases and the other (component b) linearly decreases. It is possible to obtain a functionally gradient material whose composition changes intermittently as described above.

In the above embodiment, each slurry A,
Although the supply rate of B is continuously changed, it may be changed stepwise. For example, as shown in FIG. 5, the supply velocities of the raw material slurries A and B may be changed so that one (raw material slurry A) increases stepwise and the other (raw material slurry B) decreases stepwise. . By doing so, as shown in FIG. 5 as well, the components a and b contained in the slurries A and B are stepwise in one (component a) as they go from one surface in the thickness direction to the other surface. It is possible to obtain a functionally graded material in which the composition changes stepwise such that the other (component b) decreases stepwise as the other increases.

In the above embodiment, each slurry A,
Although the magnitude of the fluctuation of the supply speed of B is always constant, the magnitude of the fluctuation may be changed on the way. For example, although not shown, the supply slurries of the raw material slurries A and B may be changed so that one is increased in a curve and the other is decreased in a curve. In this way, the components a and b contained in the slurries A and B are increased so that one increases in a curve and the other decreases in a curve from one surface in the thickness direction toward the other surface. It is possible to obtain a functionally gradient material.

The number of storage tanks connected to the mixing / discharging section 13 via the connecting pipe may be changed from two in the above embodiment to three or more. In the case of a manufacturing apparatus equipped with three storage tanks, the supply rates of the three kinds of raw material slurries A to C stored in the storage tanks can be varied as shown in FIG. 6, for example. That is, slurry A is increased linearly and slurry B is decreased linearly,
After that, the supply of the slurry B is stopped and the supply of the slurry C is started instead of the supply of the slurry B to linearly increase the supply speed of the slurry C and decrease the slurry A. By doing so, as shown in FIG. 6, the raw material slurries A to C are also used.
The components a to c included in the first component linearly increase and the component b linearly decrease from one surface in the thickness direction to the other surface, and then the component c instead of the component b. It is possible to obtain a functionally gradient material in which the component a increases linearly and the component a decreases linearly.

In the embodiment and each of the above-described examples, the functionally gradient material whose composition is continuously, stepwisely or intermittently changed is exemplified, but the structure is continuously, stepwisely or intermittently changed. It may be made to be.

As one of the methods for obtaining a functionally graded material whose structure changes continuously, stepwise or intermittently, a porosity imparting material is added to at least one of the raw material slurries A and B, and In the same manner as above, there is a method of obtaining a molded body having a distribution of the pore-forming material different in the thickness direction, and then burning the molded body to burn off the pore-forming material. This way
It is possible to obtain a functionally graded material whose density changes continuously, stepwise, or intermittently. Specific examples of the pore-imparting material at this time include synthetic resins such as acrylic resin that disappear by firing, starch, organic compounds such as cellulose, carbon,
Examples include inorganic balloons.

As another method for obtaining a functionally graded material whose density changes continuously, intermittently or stepwise, a sintering aid is added to at least one of the raw material slurries A and B, and There is a method of operating the same as in the embodiment to obtain a molded body in which the distribution of the sintering aid is different in the thickness direction, and then firing the molded body. Since the degree of denseness after firing varies depending on the concentration of the sintering aid, it is possible to obtain a functionally graded material having different densities in the thickness direction by making the distribution of the sintering aid different in the thickness direction. . Specific examples of the sintering aid at this time include aluminum oxide and yttrium oxide.

As raw material slurries A and B, a slurry of a conductive material and an insulating material is used, and the distribution of the conductive material and the insulating material is made different in the thickness direction so as to be continuous, stepwise or intermittent. Alternatively, a functionally gradient material whose electric resistance changes may be manufactured. Specific examples of the conductive material at this time include titanium, zirconium, hafnium, vanadium, tantalum, and niobium carbide.
Nitride and boride, chromium nitride / chromium carbide / tungsten carbide, tungsten / cobalt / molybdenum / nickel / manganese / iron / titanium / chromium / copper / zinc / tin / aluminum, etc., and their partial oxides and carbon , Graphite and the like. Specific examples of the insulating material include non-oxide ceramics such as silicon nitride, aluminum nitride, boron nitride, and silicon carbide, oxide ceramics such as aluminum oxide, zirconium oxide, mullite, and zircon, glass, and thermoplastic resin. , Rubber and the like.

In the above embodiment, the storage tank 11
Although a slurry-like material (raw material slurry A, B) was used as the material having fluidity to be introduced into a and 11b, the material is not limited thereto. For example, powder, liquid resin material or solution,
It may be used as a material having fluidity, but in that case, an operation of hardening or solidifying after stacking and filling the materials is necessary.

[0037]

EXAMPLES Next, the above-mentioned embodiment will be described more specifically with reference to Examples and Comparative Examples. (Example 1) Using the manufacturing apparatus of the above-described embodiment, raw material slurries A and B prepared to have compositions as shown in Table 1 below were charged into storage tanks 11a and 11b, respectively. The mixture was supplied to the mixing / discharging section 13 for 12 minutes to obtain a molded body in the molding die 12. At this time, with respect to the raw material slurry A, the initial supply rate was set to 12 cc / min and 1
For the raw material slurry B, the initial feed rate was set to 0 cc / min.
The supply rate was gradually increased at a rate of 1 cc / minute. The total supply speed of the two raw material slurries A and B supplied to the mixing space 18 is always 12 cc.
/ Min.

[0038]

[Table 1] Here, in this embodiment, the connecting pipes 16a and 16b have an inner diameter of 4 mm.
mm of fluororesin tube, the diameter of the discharge port 20 is 1.
2 mm, spray pressure 0.1 MPa, mixing space 18
Was 0.8 cc (excluding the volume of zirconia balls having a diameter of 5 mm).

The obtained molded body was fired by an atmosphere firing method to obtain a fired body. Specifically, the molded body was fired at 1750 ° C. for 3 hours under a 0.7 MPa nitrogen atmosphere to obtain a fired body.

The fired body obtained had some curvature, but no cracking was observed. This fired body was divided into 5 equal parts in the stacking direction, and silicon and titanium contained in each sample were analyzed using an X-ray microanalyzer (manufactured by Horiba, Ltd.). FIG. 7 is a graph showing the analysis result. As shown in the figure, the height of the peak of titanium becomes smaller from (a) to (e).
Therefore, it was shown that the titanium content (concentration) gradually decreased along the stacking direction (thickness direction), and the composition changed in the stacking direction.

(Example 2) In Example 1, a change was made so that the compact was fired by the hot press firing method instead of the atmosphere firing method. Specifically, while applying a press pressure of 9.8 MPa (press start temperature 1100 ° C.), 0.7 M
It was changed so that the molded body was fired at 1600 ° C. for 2 hours in a nitrogen atmosphere of Pa. Other than that was operated similarly to Example 1, and the baked body was obtained.

No bending or cracking was observed in the obtained fired body. About this fired body, an electronic probe microanalyzer (EPMA) manufactured by JEOL Ltd.
Was analyzed. As a result, in the cross section cut along the stacking direction (cross section in the stacking direction), the concentration of silicon gradually increases from one side to the other, and conversely, the concentration of titanium gradually increases from the other side to one. It was found that such a concentration distribution was exhibited. (Fig. 8
(See (a) and (b)) Further, when the electric resistance of the obtained fired body was measured using a tester, the electric resistance was 0 to 0 from one end face side to the other end face side in the cutting plane in the stacking direction.
It was shown to change continuously in the range of 1000Ω.

[0043]

Since the present invention is constructed as described above, it has the following effects. Claim 1 and Claim
2. According to the inventions of claims 4 to 8 , it is possible to obtain a functionally graded material whose composition or structure changes in various gradient patterns.

Further, the raw material slurry can be surely mixed even in a narrow mixing space .

[0045] According to the invention described in claim 3, claim 1
Alternatively , in addition to the effect of the invention described in claim 2, sedimentation / separation of dispersed particles in the raw material slurry can be prevented. Claim
According to the invention of claim 9, any one of claims 4 to 7
In addition to the effect of the invention described in any one of the above, continuous, stepwise or
It is possible to obtain a functionally graded material whose density changes intermittently.
Wear. According to the invention described in claim 10, claims 4 to
In addition to the effect of the invention described in any one of claim 7, continuous
Slope that changes electrical resistance in a static, stepwise or intermittent manner
A functional material can be obtained.

[Brief description of drawings]

FIG. 1A is a conceptual view showing a manufacturing apparatus of a functionally graded material of the present embodiment, and FIG. 1B is a half sectional view showing an enlarged mixing / discharging section of the manufacturing apparatus.

FIG. 2 (a) is a graph showing the relationship between the feed rate of the raw material slurry and time, and FIG. 2 (b) shows the relationship between the concentration of the components contained in each raw material slurry in the functionally gradient material and the position in the thickness direction. Graph.

3A and 3B are graphs showing the relationship between the feed rate of the raw material slurry and time.

4A and 4B are graphs showing the relationship between the feed rate of the raw material slurry and time.

5A and 5B are graphs showing the relationship between the feed rate of the raw material slurry and time.

6A and 6B are graphs showing the relationship between the feed rate of the raw material slurry and time.

7A to 7E are graphs showing the results of analyzing the functionally gradient material of Example 1 using an X-ray microanalyzer.

FIG. 8A is a mapping image showing a concentration distribution of silicon in a cut surface in the stacking direction of the functionally gradient material of Example 2;
(B) is a mapping image showing the concentration distribution of titanium.

[Explanation of symbols]

A, B ... Raw material slurry as a material having fluidity, 12
... Mold, 18 ... Mixing space.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takanori Nomura 777 Maeno, Mino City, Gifu Prefecture Gifu Prefecture Product Technology Research Laboratory, Mino Branch Office (56) Reference JP-A-6-297429 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B28B 1/14-1/16 B28B 1/32 B28B 13/02

Claims (10)

(57) [Claims] 1. A method of producing a functionally gradient material, the composition or composition of which is continuously, stepwisely or intermittently changed, wherein the raw material slurry having two or more kinds of fluidity is used for each raw material. Supplying the raw material slurry to the mixing space while continuously, stepwise or intermittently varying the ratio of each raw material slurry while always keeping the sum of the supply rates of the slurry constant, and mixing the raw material slurry in the mixing space. And a step of spray-discharging the mixed slurry and stacking and filling the mixture in a molding die, and the volume of the mixing space is determined by the mixing process by the mixing space.
The processing speed is almost the same as the sum of the supply speed of each raw material slurry
A method for producing a functionally gradient material, characterized in that the volume ratio is such that the ratio of each raw material slurry when it is supplied to the mixing space while fluctuating is maintained also in the mixing slurry. The 2. A front Symbol mixing space and mixed for ball housing, stirring and mixing well mixed slurry obtained by carried out simultaneously by mixing ball in addition to the shaking mixing by vibrating the mixing space, wherein The method for producing a functionally gradient material according to claim 1, wherein the raw material slurry is mixed in a mixing space to form a mixed slurry, and the mixed slurry is simultaneously spray-discharged. 3. The raw material slurry contains sedimentation particles of dispersed particles.
The method for producing a functionally gradient material according to claim 1 or 2 , wherein a stabilizer that prevents separation is added . 4. The mixed slurry is two kinds of raw material slurry.
Of each raw material slurry obtained by mixing
Regarding the speed, one raw material slurry was measured directly over time.
Linearly increase the second raw material slurry at the same time
The method for producing a functionally gradient material according to claim 1, wherein the functionally graded material is reduced . 5. The mixed slurry is two kinds of raw material slurry.
Of each raw material slurry obtained by mixing
In terms of speed, first increase the raw material slurry linearly.
And decrease the second raw material slurry linearly,
After that, the direction of fluctuations in the feed rate of each raw material slurry was reversed halfway.
Therefore, the raw material slurry of 1 is reduced linearly and
Of changing the raw material slurry to increase linearly
The process is repeated once or twice.
A method for manufacturing the functionally graded material according to claim 3.
Law. 6. The mixed slurry is two kinds of raw material slurry.
Of each raw material slurry obtained by mixing
Regarding the speed, first, each raw material slurry was constant, and then
While linearly increasing the raw material slurry of No. 1
The material slurry is reduced linearly, and finally each material slurry
It is characterized by changing the supply rate of
The inclination according to any one of claims 1 to 3.
Manufacturing method of functional materials. 7. The mixed slurry is two kinds of raw material slurry.
Of each raw material slurry obtained by mixing
In terms of speed, first increase the raw material slurry linearly.
And linearly reduce the second raw material slurry,
After making the feed rate of each raw material slurry constant,
And linearly increasing the raw material slurry of
That the slurry was changed to decrease linearly
Claim 1 to 3 characterized by the above-mentioned.
Manufacturing method of functionally gradient material of. 8. The mixed slurry is three kinds of raw material slurry.
Of each raw material slurry obtained by mixing
Regarding the speed, if one raw material slurry is increased linearly,
In both cases, the second raw material slurry was decreased linearly, and
Supply of raw material slurry was stopped and replaced with three raw materials
Supply of slurry was started, and the supply speed of these three raw material slurries
Linearly increase the degree and reduce one raw material slurry
The method according to claim 1, characterized in that it is changed so as to be reduced.
To the production of the functionally graded material according to claim 3.
Method. 9. The mixed slurry is two kinds of raw material slurry.
Is obtained by mixing
Of at least one of the
5. At least one of them is added.
Made in tilting the swash functional material according to any one of claims 7
Build method. 10. The mixed slurry comprises a conductive material and an insulating material.
Obtained by mixing two types of raw material slurries
Any of claims 4 to 7 characterized in that
A method for producing a functionally graded material as described in 1 above.