JP2002161320A - Method for manufacturing metal-inorganic particle composite - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal-inorganic particle composite with superior characteristics, which can be formed into a complicated configuration without geometrical restriction, at low cost and with adequate productivity. SOLUTION: The method for manufacturing the metal-inorganic particle composite consisting of metal and inorganic particles is characterized by (a) filling the inorganic particles in a heat resistant vessel having an opening on its top, and sintering them, (b) mounting the metal on the sintered compact of the above inorganic particles as accommodated state in the above heat resistant vessel, (c) heating it at a melting point of the above metal or higher to make molten metal impregnated in the above sintered compact of inorganic particles, and (d) cooling and taking out a hardened article from the above heat resistant vessel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing a metal-inorganic particle composite comprising a metal and inorganic particles.

[0002]

2. Description of the Related Art Conventionally, a metal-inorganic particle composite material obtained by compounding a metal with inorganic particles such as ceramic particles has been used for the purpose of reducing the weight of the material. This metal-inorganic particle composite material is manufactured using, for example, a press device shown in FIG. That is, for example, a space formed by a cylindrical molding die 11 and a pair of upper and lower punches 12a and 12b is filled with a mixture 13 of inorganic particles and metal powder, and an initial load is applied by a spring 15 wound around a piston 14. give,
Electric current is applied between the piston 14 and the base 16 and after a predetermined time elapses, the piston 17 is compressed and lowered by hydraulic pressure and sintered.

However, the above method requires a press device 10 as shown in the figure. Also 30-500
Since a current density of A / cm ² and a press pressure of 10 to 200 kgf / cm ² are required, the production cost is high. In addition, since pressure is applied, it cannot be formed into a shape in which stress is concentrated, and there is a limitation in shape.
Furthermore, only one metal-inorganic particle composite is obtained in one operation, and the productivity is low.

Further, in such a metal-inorganic particle composite material, it is also possible to change the physical properties of the metal-inorganic particle composite material by adjusting the packing density of the inorganic particles by mixing and using a plurality of types of inorganic particles having different particle diameters. However, since the inorganic particles flow with the melting of the metal, uneven distribution occurs due to a difference in specific gravity between the large-diameter particles and the small-diameter particles, and there is a problem that it is difficult to obtain a homogeneous metal-inorganic particle composite material.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above situation, and has no problem in terms of shape, can be processed into a complicated shape, and has excellent properties. It is an object of the present invention to provide a method that can be manufactured at low cost and with high productivity.

[0006]

In order to achieve the above object, the present invention provides a method for producing a metal-inorganic particle composite material comprising a metal and inorganic particles, comprising the steps of: (B) placing a metal on the inorganic particle sintered body while holding the obtained inorganic particle sintered body in the heat-resistant container; A) heating to a temperature equal to or higher than the melting point of the metal, impregnating the molten metal into the inorganic particle sintered body, and (d) removing the cured product from the heat-resistant container after cooling. And a method for producing the same.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The method for producing a metal-inorganic particle composite of the present invention will be described in detail below. FIG. 1 is a process chart for explaining the method for producing a metal-inorganic particle composite material of the present invention.

First, as shown in FIG. 1 (a), a cavity substantially corresponding to a target shape is formed, and an inorganic particle is filled in a boat-type heat-resistant container 1 having an open upper surface, for example, and sintered. As a result, an inorganic particle sintered body 2 is obtained. The sintering of the inorganic particles is performed by placing the heat-resistant container 1 filled with the inorganic particles in a suitable heating furnace (not shown), and sintering the inside of the heating furnace with an inert gas such as nitrogen gas or argon gas. Can be easily performed by heating at a predetermined temperature while flowing a reaction gas.

Next, as shown in FIG. 1B, the heat-resistant container 1 containing the inorganic particle sintered body 2 is taken out of the heating furnace, and the metal 3 is placed on the inorganic particle sintered body 2. The heat-resistant container 1 is stored in the heating furnace again. At this time, the metal 3 may be a metal particle other than using a plate-shaped lump as shown in the figure. Then, the furnace temperature of the heating furnace is raised to a temperature equal to or higher than the melting point of the metal 3, and is maintained for a predetermined time to impregnate the molten metal into the inorganic particle sintered body 2.

After cooling to about room temperature, the metal-inorganic particle composite material 5 is obtained by removing the heat-resistant container 1 as shown in FIG. The metal-inorganic particle composite material 5 has a structure in which the metal 3 enters the gaps between the sintered inorganic particles 2a.

In the above production method, the types of the metal and the inorganic particles are not limited at all, and can be arbitrarily selected according to the purpose. For example, as the metal 3, copper, aluminum, magnesium, zinc, tin, silicon, titanium, etc.
Alternatively, these alloys can be arbitrarily selected. On the other hand, as the inorganic particles 2a, ceramics such as silica, alumina, and mullite (a mixture of SiO ₂ and Al ₂ O ₃ ) are generally used. Can be further reduced in weight.
Further, the inorganic particles 2a can be used by mixing solid particles and hollow particles.

Further, the inorganic particles 2a may be used as a mixture of plural kinds having different particle diameters, whereby the packing density of the inorganic particles 2a in the metal-inorganic particle composite material 5 can be adjusted, and the desired properties can be obtained. Can be obtained. At this time, since the inorganic particles 2a are sintered before compounding with the metal 3 (step (b)), the small-sized particles and the large-sized particles are not unevenly distributed as in the related art.
A homogeneous metal-inorganic particle composite material 5 is obtained. It is also preferable that the inorganic particles 2a be subjected to an appropriate surface treatment in order to enhance the wettability with the metal 3.

Further, in the above-described series of steps, a plurality of heat-resistant containers 1 can be processed by one operation, so that the productivity is high. Moreover, unlike the related art, the press device 10 (see FIG. 2), the energization, and the like are not required, and the metal-inorganic particle composite material 5 can be manufactured at low cost.

[0014]

As described above, according to the present invention,
The metal-inorganic particle composite material that can be processed into a complicated shape without any limitation in shape and has excellent properties can be manufactured at low cost and with high productivity.

[Brief description of the drawings]

FIG. 1 is a process chart for explaining a method for producing a metal-inorganic particle composite material of the present invention.

FIG. 2 is a cross-sectional view illustrating a conventional method for producing a metal-inorganic particle composite material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat-resistant container 2 Inorganic particle sintered body 2a Inorganic particles 3 Metal 5 Metal-inorganic particle composite material 10 Press device 11 Mold 12a Punch 12b Punch 13 Mixture of inorganic particles and metal particles 14 Piston 15 Spring 16 Base 17 Piston

Claims (3)

[Claims] 1. A method for producing a metal-inorganic particle composite material comprising a metal and inorganic particles, comprising: (a) filling inorganic particles into a heat-resistant container having an open upper surface and sintering the same; While holding the obtained inorganic particle sintered body in a container, a metal is placed on the inorganic particle sintered body, and (c) the molten metal is heated to a temperature equal to or higher than the melting point of the metal, and A method for producing a metal-inorganic particle composite material, comprising impregnating a sintered particle, and (d) taking out a cured product from the heat-resistant container after cooling. 2. The method for producing a metal-inorganic particle composite according to claim 1, wherein the inorganic particles are a mixture of a plurality of kinds having different particle diameters. 3. The method for producing a metal-inorganic particle composite according to claim 1, wherein the inorganic particles are hollow particles.