JPH074808B2 - Sheet-like single fiber-ceramics powder matrix mixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sheet shape for molding a fiber reinforced ceramic composite material, a fiber reinforced glass composite material or the like used for a heat resistant structural member such as a gas turbine engine part. It relates to a monofilament-ceramic powder matrix mixture.

[Conventional technology]

Conventionally, as shown in FIG. 4, single fibers 2 are arranged in a composite material molding die 1, and as shown in FIG. 5, ceramic powder matrix 3 is charged, and heated and processed to
Fiber-reinforced ceramic composites and fiber-reinforced glass composites were molded.

[Problems to be solved by the invention]

The disadvantages of this conventional method include the following two points.

(1) It is difficult to obtain a high-performance molded product because the ceramic powder matrix cannot be uniformly and sufficiently inserted between the single fibers.

(2) Since the binding force between the single fiber and the ceramic powder matrix is weak, they are easily separated from each other, so that it is necessary to handle them with extreme care. It is an object of the present invention to provide a sheet-shaped single fiber-ceramics powder matrix mixture capable of easily forming a high performance fiber reinforced ceramics composite material or a fiber reinforced glass composite material by solving the above drawbacks. And

[Means for solving problems]

The present invention has the above object (1) of adding a ceramic powder matrix to a single fiber having a required density.
(2) This is achieved by adding an adhesive to increase the binding force between the single fiber-ceramics powder matrix.

That is, the present invention is obtained by forming monofilaments aligned at a required density, applying a slurry of any ceramic powder matrix with an adhesive, and molding the mixture by heating it as necessary. Relates to a sheet-shaped monofilament-ceramics powder matrix mixture.

In the present invention, it is preferable to use monofilaments having a diameter of 100 to 150 μm, and ceramic powders having a particle diameter of 10 μm or less.

[Action]

In the present invention, in order to apply the slurry-like ceramic powder powder matrix between the single fibers aligned with the required density,
The matrix can be sufficiently and uniformly inserted between the single fibers. Further, since the ceramic powder matrix is used together with the pressure-sensitive adhesive, the binding force between the single fiber and the ceramic powder matrix is enhanced, and a sheet-shaped molding material having excellent handleability can be obtained.

〔Example〕

Although there are various methods for producing the sheet-shaped monofilament-ceramics powder matrix mixture according to the present invention, an example of a preferable method will be described with reference to the drawings.

First, a frame 4 as shown in FIG. 1 is prepared. Next, as shown in FIG. 2, the monofilaments 2 to be used are aligned on the frame 4 at required intervals. Further, the ends may be fixed so that the single fiber 2 does not move.

Next, the single fiber 2 is coated with the ceramic powder matrix 3 (see FIG. 3). A brush or a brush may be used at the time of application, but as the brush, a brush having a fine tip such as a face brush is preferable. Also, ceramic powder matrix 3
May be used in the form of slurry. The ceramic powder matrix 3 applied here preferably has a particle size of 10 μm or less. On the other hand, the slurry may be composed of a ceramic powder matrix 3, water and gelatin, or a pressure sensitive adhesive that decomposes and disappears at a temperature lower than the composite molding temperature, such as gelatin or a polymer compound.

The sheet coated as described above is dried by heating in a drying oven or the like to remove water. When the ceramic powder matrix 3 is a material such as glass whose viscosity is lowered by heating, the fiber surface may be covered with a glass layer in advance by heating to the softening point and melting. After drying, the sheet-shaped monofilament-ceramics powder matrix mixture is separated from the frame 4.

Fig. 3 shows the sheet-like monofilament obtained as described above.
It is a figure which shows an example of a mode at the time of putting the ceramics powder matrix mixture 5 in the composite material shaping | molding die 1 and laminating | stacking, and shaping | molding a desired molded object.

〔The invention's effect〕

With the sheet-shaped monofilament-ceramics powder matrix mixture according to the present invention, (1) sufficient powder matrix is inserted between the monofilaments, so that a uniform molded product is easily obtained, and (2) monofilaments and ceramics. Since the binding force of the powder matrix is high due to the effect of the pressure-sensitive adhesive, it can be made into a sheet shape, and by stacking it, handling at the time of molding the composite material is easy, and the disorder of the arrangement and distribution of fibers does not occur easily. The effect of is obtained.

[Brief description of drawings]

FIG. 1 shows a frame for producing a sheet-shaped monofilament-ceramics powder matrix mixture according to the present invention, FIG. 2 shows a diagram in which monofilaments are aligned in the frame of FIG. 1, and FIG. FIG. 3 is a cross-sectional view in which the sheet-shaped single fiber-ceramics powder matrix mixture of the present invention is put into a composite material mold and laminated. Further, FIG. 4 shows a cross-sectional view in which single fibers are arranged in a molding die according to a conventional method, and FIG. 5 shows a cross-sectional view in which a ceramic powder matrix is put into a molding die in which single fibers according to the conventional method are arranged.

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Claims (1)

[Claims] 1. A monofilament having a required density and aligned,
A sheet-shaped monofilament-ceramics powder matrix mixture, which is obtained by applying a slurry of any ceramic powder matrix and applying it with an adhesive, and heating this as necessary to form the mixture.