JPS6277186A - Solid phase joining method - Google Patents

Abstract

PURPOSE:To execute firm solid phase junction by combining the same or different kind materials of ceramics, a fiber reinforced metallic material and a metallic material, placing the ultrafine powder of a specified particle diameter or below corresponding to a kind of a joining material, between joint surfaces, and heating and pressing it. CONSTITUTION:Between combination 1, 2 joint surfaces of the same material or a different kind material of ceramics, a fiber reinforced metallic material and a metallic material, an ultrafine powder 3 whose particle diameter is <=1mum, of one of materials to be joined 1, 2 or a mixed material of both of them is placed, and heated and pressed. By utilizing a high reactivity of the ultrafine powder 3, each of the material to be joined 1, 2 is brought to a solid phase junction firmly. In this regard, this junction is usually executed in a vacuum atmosphere or an inert gas atmosphere, but in case of joining ceramics of an oxide compound or a nitride compound, it can be executed in an oxidizing or nitrifying atmosphere.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a method for solid-phase joining of similar or dissimilar materials such as ceramics and metals or fiber-reinforced metals and metals;
[Conventional technology] In recent years, energy saving and energy efficiency have progressed in various industrial fields, and the environment in which materials are used has become harsher. The emergence of materials with wear properties is desired. Ceramics and fiber-reinforced gold #I (hereinafter referred to as IFRM) have been attracting attention as materials that meet these requirements, and some of them have already been put into practical use. The tζ used as a material has a poor interlayer in terms of impact resistance, which prevents its use from expanding.

In order to solve this problem, effectively utilize the high functionality of ceramics and IFRM, and expand their applications, it is essential to use them in combination with metal materials. That is, it is necessary to give ceramics or FRM the characteristics of corrosion resistance, heat resistance, and abrasion resistance, and to give metal materials the strength and toughness necessary as structural materials.

For this purpose, it is absolutely necessary to bond ceramics or FRM and metal materials. ◇ Diffusion bonding is usually used to bond these dissimilar materials. In general, a method of directly joining the metal material 1 and the ceramic 2, or a method of inserting an insert material made of foil or plate material between the joining surfaces of the metal material 1 and the ceramics 2 and joining them through this insert material is generally adopted. There is.

[Problem that the invention seeks to solve]

In the conventional method of bonding the above-mentioned ceramics or The problem is that you can't get it.

This invention was made to solve these problems, and the purpose is to propose a solid-phase joining method that can join similar or dissimilar materials such as ceramics, IFRM, and metal materials with high strength. That is.

[Means for solving problems]

The solid phase bonding method according to the present invention applies to ceramics.

In a solid-phase joining method in which fiber-reinforced metal materials and metal materials are used as materials to be joined, and the same material as each of the above materials or a combination of different materials is used, a particle size of 1 μm according to the type of materials to be joined is used.
The following ultrafine powder material is placed between the joint surfaces and heated and pressurized.

[For production]

In this invention, by filling an ultrafine powder material with an extremely large specific surface area between the bonding surfaces of the materials to be bonded, the characteristics of the bonded part are improved by utilizing the high reactivity of the ultrafine powder ◇ [Example ] Figure 1 is an explanation of one embodiment of the present invention, in which 1 is a metal material, 2 is a ceramic, and 6 is a metal material 1.
It is an ultrafine powder with a grain size of 1 μm or less that is filled between the bonding surfaces of the ceramic and the ceramic 2. The ultrafine powder 6 has an extremely large specific surface area, for example, the surface area of an ultrafine powder with a particle size of 25 m is about 55 rm.
'/gr, has very high reactivity, and is sometimes used as a catalyst.

As shown in Fig. 1, with ultrafine powder 5 filled between the joint surfaces of metal material 1 and ceramics 2,
．． The metal material 1 and the ceramics 2 are bonded by applying pressure at a pressure of approximately 0.0 mm and heating at a predetermined temperature for a predetermined time.

The heating temperature and heating time vary depending on the type of ultrafine powder 3, but the temperature is set so that the ultrafine powder 3 exhibits high reactivity and is below the melting point of the metal material 1 to be joined. Ultrafine powder 6 shows high reactivity in the state,
The joining surfaces of the metal material 1 and the ceramics 2 and the ultrafine powder 3 are activated, making the joining easier @ Also, since the ultrafine powder filled between the joining surfaces is also sintered, the joined joint has sufficient strength. 〇The ultrafine powder 6 used in this bonding method can be selected appropriately depending on the type of materials to be bonded, but since the ultrafine powder 6 itself has high reactivity, the selection range is limited. is broadly divided into metal materials 1 and ceramics 2
When joining, any of ceramics, metals, and mixed powders of ceramics and metals can be applied.
In this case, the ultrafine powder 3 does not necessarily have to be of the same type as the materials to be joined; for example, ZrO□ and N may be used as the materials to be joined.
When a single-based alloy is used, ZrO2- and IJi-based alloy powders of the same type as the materials to be joined and mixed powders thereof are effective as ultrafine powder materials, but At203. It has been confirmed that stainless steel pot powder is also effective.

Furthermore, the bonding atmosphere when performing solid phase bonding is usually a vacuum atmosphere or an inert gas atmosphere such as argon.
When oxide-based or nitride-based ceramics are bonded, good bonding can be achieved even in an oxidizing or nitriding atmosphere, respectively.

[Specific Example 1] A specific case of joining will be described based on the above embodiment.

At2o3 and Tl -6ht -4v alloy with bonding dimensions of 10w x 10w are used as the materials to be joined, and a gap of 1W is provided between the surfaces to be joined on the materials to be joined.
Filled with ultrafine powder of 1 to 0.1 μm, and applied pressure of 1 to φ
d. Heating The face-to-face bonding was performed under the conditions of heating at a heating temperature of approximately 900, heating and holding for 1 hour, and a vacuum atmosphere of 5 x 10-2 Torr. At the same time, the materials to be joined were directly joined under the above joining conditions without being filled with ultrafine powder, and the joining strength between the two was examined. This joint strength was evaluated by bending strength (three-point bending).

As a result, the joint strength in the case of direct joining without filling with ultrafine powder material was 1.3 Kyt/-, and the joint interface broke in the form of peeling, whereas the one filled with ultrafine powder had a lower bending strength. reached 11.2 to f/krl, and the fracture occurred not at the joint surface but at a location slightly deeper into the At203 base material side.

[Specific Example 2] The materials to be joined and the welding conditions were the same as those in Specific Example 1 above, and At203 fine powder with a particle size of α02 to 0.08 μm was used as the ultrafine powder material to join, and the joining strength was investigated. As a result, the bending strength was 12.6 kgt7-, and the fracture occurred at a location slightly deeper into the At203 base material side, as in Example 1 above.

In the above embodiments, the bonding between oxide-based ceramics and metal materials has been described, but the bonding between nitride-based, carbide-based or boride-based ceramics and metals, the bonding between ceramics and FRM, or the bonding between FRM and metals is also applicable. We have confirmed that it can be used effectively for bonding as well.

Furthermore, high bonding strength can be obtained not only when applying the bonding of dissimilar materials but also to bonding of the same type of materials. [Effects of the Invention] As explained above, this invention provides By filling the material with an ultrafine powder material with an extremely large specific surface area, the materials to be joined are joined by utilizing the high reactivity of the ultrafine powder, so the joining strength can be increased to a level close to that of the joining base material. It has the effect of Therefore, it is possible to expand the use of composite materials of ceramics and metal materials as structural materials.

[Brief explanation of drawings]

FIG. 1 is a detailed explanatory diagram of the present invention, and FIG. 2 is an explanatory diagram showing a conventional joining method.@1: Metal material, 2: Ceramics, 3: Ultrafine powder. Agent: Patent Attorney Tadashi Sato Year 1: Metals 2: Begging.../7th grade

Claims (1)

[Claims] In a solid-phase joining method in which ceramics, fiber-reinforced metal materials, and metal materials are used as materials to be joined, and the same material as each of the above materials or a combination of different materials is used, an ultrafine powder material with a particle size of 1 μm or less depending on the type of materials to be joined is used. A solid phase bonding method characterized by placing a material between the bonding surfaces and applying heat and pressure.