JPH01258947A - Fiber-reinforced ceramics composite material - Google Patents

Abstract

PURPOSE:To improve the quality such as anti-rupture toughness and the like of a fiber-reinforced ceramics composite material, by dispersing one or more kinds of fine particles or whiskers etc. between long fiber layers of said material, and molding the same with added heat and pressure. CONSTITUTION:A sheet like molding material is prepared, on the surface of which one or more kinds of fine particles, whiskers etc. are uniformly dispersed. In this case, the molding material may be applied with a slurry of such an adhesive material which is made of water and gelatine, or high polymer that is dissolved and disappear at a temperature lower than the composite molding temperature, but the material applied with this slurry should be heated and dried in a drying furnace or the like so as to remove moisture therefrom. Then, the prepared sheet-like material is laminated in a mold 3 and molded by a hot press or the like with adding heat and pressure. As a result, the one or more kinds of the dispersed fine particles or whiskers etc. reinforce between the layers, thereby to improve the quality of the material such as anti-rupture toughness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fiber-reinforced ceramic composite material molded using a sheet-shaped molding material.

[Conventional technology]

Conventionally, a sheet-shaped molded material as shown in Fig. 3 was used, and the fourth
As shown in the figure, they were laminated and placed in a composite mold and molded under heat and pressure using a press or dobles tool. In FIGS. 3 and 4, 01 indicates a fine ceramic powder matrix, 02 indicates fibers, and 03 indicates a composite mold.

[Problem to be solved by the invention]

In the conventional method, between the layers of laminated sheet-shaped molding materials,
M) IJ hooks are easy to break, and the fibers remain sparse even after molding, making it impossible to fully expect the improvement in toughness that is the aim of fiber reinforcement.

An object of the present invention is to provide a fiber-reinforced ceramic composite material that can eliminate the above drawbacks.

[Means to solve the problem]

The fiber-reinforced laminate/cush composite material according to the present invention is characterized in that one or more types of fine particles or whiskers are dispersed between the long fiber layers of the fiber-reinforced ceramic composite material, and the material is heated and press-molded. .

[Effect]

According to the present invention, instead of uniformly dispersing one or more types of fine particles or whiskers between the sheet-shaped molding materials and then heating and press-molding them using a hot press or the like, in the conventional method, the fibers are loosely dispersed. It becomes possible to strengthen the area between the eyebrows, which is a cause of deterioration in performance, by using fine particles or whiskers.

〔Example〕

Figures 1 and 2 are diagrams for explaining one embodiment of the present invention, respectively. Figure 1 is a perspective view of a sheet-shaped molding material, and Figure 2 is a heating of the material shown in Figure 1. FIG. 2 is a cross-sectional view of a composite mold for pressure molding.

In FIGS. 1 and 2, reference numeral 1 indicates a fine ceramic powder matrix or a matrix, 2 indicates fibers, 3 indicates a composite mold, and 4 indicates fine particles and a whisker-dispersed layer.

Although there are various methods for molding the fiber-reinforced ceramic composite material according to the present invention, a preferred method involves preparing a sheet-shaped molding material as shown in FIG.

Next, as shown in Figure 1, fine particles (e.g. SiC, Sl, N4.8102.A/, 20
．． .

Z rO2, etc.) or whiskers (e.g. 81C, Si
, N4, etc.) are uniformly dispersed. At that time, it may be applied in the form of a slurry with water and an adhesive, such as gelatin or a polymer compound, which decomposes and disappears at a lower temperature than the composite molding temperature. The sheet-shaped molded material coated with the coating film is dried by heating in a drying oven or the like to remove moisture.

The sheet-shaped molding materials prepared as described above are laminated as shown in FIG. 2, and then heated and pressed at a splinterless stop.

〔Effect of the invention〕

The fiber-reinforced ceramic composite material according to the present invention is:

By reinforcing the interlayers with one or more types of dispersed fine particles or whiskers, performance such as K fracture toughness can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one or more types of fine particles, whiskers, etc. uniformly dispersed on the surface of a sheet-like molded material as an embodiment of the present invention. A cross-sectional view of the molding materials shown in Figure 1 placed in a mold and laminated,
FIG. 3 is a perspective view of a sheet-like molding material material as a conventional example, and FIG. 4 is a cross-sectional view of a sheet-like molding material material as a conventional example placed in a mold and laminated. ! ... Ceramic fine powder matrix, 2... Fiber, J... Composite mold, A... Fine particles, whisker dispersion layer. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] A fiber-reinforced ceramic composite material, characterized in that one or more types of fine particles or whiskers are dispersed between the long fiber layers of the fiber-reinforced ceramic composite material and then heated and press-molded.