JPH0570259A - Production of metal-nonmetal joined body - Google Patents

Abstract

PURPOSE:To produce a ceramic-metal joined body without forming a pool of a brazing filler metal after joining with the brazing filler metal. CONSTITUTION:When a metal is joined to a nonmetal with Ti foil and a brazing filler metal or a clad material consisting of them to produce a metal-nonmetal joined body, the thickness of the Ti foil is regulated to 2-10mum and the total thickness of the brazing filler metal and the Ti foil is regulated to <=40mum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining non-metals such as ceramics and graphite to metals, and is particularly applicable to rocker arms, tappets, ceramic rotors and the like as engine parts.

2. Description of the Related Art Conventionally, a technique for joining metal and non-metal or the like using a roller has been disclosed. Under such circumstances, JP-A-6
Japanese Unexamined Patent Publication No. 2-110868 discloses a method for producing an active metal rod as the roller material. In the manufacturing method, an active metal layer such as Ti is deposited on the surface of a metal substrate (raw material), and the thickness ratio of the metal layer and the raw material is specified.

[0002]

However, in the joined body joined by using the roll material of the above publication, the roll material protrudes from between the joining surfaces of the metal and the ceramic and becomes a lodge after joining.
The lodge has a drawback that it causes residual stress and deteriorates the strength of the joined body itself. Further, since the lodge and the jig for positioning are attached to each other at the time of joining, the durability of the jig is lost. It is an object of the present invention to provide a method for manufacturing a joined body in which ceramics and metals are joined together by using a roller, in which many lodges do not occur after joining.

[0003]

[Means for Solving the Problems] The means is a method for manufacturing a joined body, in which a metal and a nonmetal are joined using a Ti foil and a roll material or a clad material of a Ti foil and a roll material. If the thickness of the foil is 3 μm or more and 10 μm or less, the roll
The sum of the thickness of the material and the thickness of the Ti foil is 40 μm or less. Here, using Ti foil and a roll material means
It does not matter whether the Ti foil is on the ceramic side or the metal side of the material. The Ti foil and the cladding material of the ro material are a physical vapor deposition method such as a vacuum vapor deposition method, a sputtering method and an ion plating method, a chemical vapor deposition method, a metal plating,
The Ti layer is adhered to the roll material by pressure bonding or the like. A reaction layer may be formed between the roller and the Ti layer depending on the deposition method, but the thickness of the Ti layer includes the thickness of the reaction layer. The raw material is Ag-based or Ag-C.
u-based alloy, Ag-Pd-based alloy or Ag-Cu-In
It is desirable that the alloy be a system alloy.

[0004]

By setting the sum of the thickness of the roll material and the thickness of the Ti foil to 40 μm or less, it is possible to obtain a joined body with a small amount of pooling and improve the dimensional accuracy of the joined body. Further, since there is little lodge, the residual stress is small and the possibility that cracks will occur in the ceramic during use of the bonded body is small. Furthermore, since the lodges are small, the lows do not adhere to the set jig or tool made of graphite for positioning.
If the thickness of the Ti foil is less than 2 μm, sufficient bonding strength cannot be obtained, and if it exceeds 10 μm, the brittle layer (TiSi intermetallic compound such as Ti ₃ Si) at the bonding portion disappears and the bonding strength becomes stable. .. Ti, which is generally an active metal
Is better and more compatible with ceramics than other metals. The Ti-containing roll may be difficult to process with a rolling roll because the roll itself is hard, whereas the Ti-free roll is not hard and is easy to process.

On the other hand, Ti-containing silver rolls are easily affected by the atmosphere in which they are rolled, and it is necessary to roll them in a high vacuum. It is difficult to adjust. In addition, since the Ti-containing silver roll has Ti dispersed uniformly throughout the roll, the viscosity of the roll increases due to the influence of the atmosphere, and a good bonded body cannot be obtained. On the other hand, silver clad with Ti is
A good bonded body is obtained which is less affected by the atmosphere as compared with a silver roller containing Ti.

EXAMPLE A manufacturing method of the present invention will be described with reference to FIG. FIG. 1 shows a metal 2 and a ceramic 3 as a roller material 4.
It is a joined body 1 joined by using, and can be applied to tappets, rocker arms, ceramic rotors and the like which are engine parts.

[Figure 1]

FIG. 2 is an enlarged view of the main part A of FIG. A lodge 6 is formed on the outer periphery of the joint surface depending on the thickness of the material of the joint surface.

FIG. 2 is a view of joining the metal 2 and the ceramic 3 with the roller material 4 by using a temperature, a time, an atmosphere, a vacuum degree and the like suitable for the roller material 4. First, as the ceramic 3 to be bonded, there are known ceramics such as zirconia, alumina, mullite, silicon nitride, silicon carbide, AlN, glass ceramic, PZT, TiN, cemented carbide, and cermet. Further, as the metal 2 to be joined, nickel chrome molybdenum steel,
Kovar, molybdenum, copper, nickel, Incoloy 90
3rd grade is possible. Then, if necessary, a load is applied to the joint surface by a weight 7 or the like, and the jig 5 for positioning is used for joining. This is because the jig 5 for positioning made of graphite or the like is in a liquid state when the temperature of the roller 4 reaches a certain temperature and prevents the joining surfaces from being displaced from each other at that time. (Example 1) Silicon nitride having a diameter of 10 mm and a length of 10 mm and nickel-chromium-molybdenum steel (JIS-SNCM630) were bonded together by using the roll material and the Ti foil shown in Table 1. The sizes of silicon nitride and nickel-chromium-molybdenum are the same, and the diameter is 10 mm and the length is 10 mm. The size of the roll material was 10 mm in diameter and the thickness was variously changed as shown in Table 1.

[Table 1]

The loading conditions are 1 × 10 at a temperature of 750 ° C.
Performed in a vacuum of ^-2 Pa for 10 minutes, and 10 pieces each were joined. (Example 2) The same silicon nitride and nickel-chromium-molybdenum steel (JIS-SNCM630) as in Example 1 were joined by the clad material of the Ti foil and the roll material shown in Table 2. The clad material used in this embodiment was a material obtained by depositing a Ti foil on the material by ion plating. Each sample No. 10 pieces each were joined. Sample No. 17-No. 20
With respect to the metal (nickel chrome molybdenum steel) side, the Ni end plate having a thickness of 0.5 mm is joined to the joint end surface on the metal (nickel chrome molybdenum steel) side through a Ni material which is preliminarily plated with Ni and does not contain Ti.

[Table 2]

Five cantilevers of each of the bonded bodies 11 obtained in (Example 1) and (Example 2) were measured for initial cantilever bending strength, and the other five each had -40 ° C and 150 ° C. After repeating the heat cycle of 500 times, the cantilever bending strength was measured. As for cantilever bending strength, as shown in FIG. 3, the metal part (JIS-SNCM630) 12 of the joined body 11 was chucked.
Then, the scissors ceramic (silicon nitride) portion 13 was subjected to a static load at a position 7 mm from the joint surface. The results are shown in Tables 1 and 2. In addition, each of the ten sample Nos. Among them, Table 1 shows the number of the graphite jigs and tools for positioning which are bonded at the time of joining.

FIG. 3 (Results) When the appearance of the joint portion of the obtained joint body was visually observed, the sum of the thicknesses of the roll material and Ti was 40 μm.
Samples exceeding m (No. 3R, No. 4R, No. 8)
R, No. In 16R), relatively many lodges occurred. The samples in which the sum of the thicknesses of Ti and the other materials did not exceed 40 μm had a relatively small amount of lodge and had a good appearance.

Further, the larger the sum of the raw material and the Ti is, the more closely the graphite jig and tool are bonded (4R, 8R,
3R). When the degree of crevice generation was examined on the bonded surfaces using an ultrasonic flaw detector, there was no unbonded portion for all samples and it was good. Ti thickness is 2 μm
Samples less than (No. 12R, No. 13R, No. 17
R, No. 18R) had poor reactivity with ceramics and had low initial strength and low strength after thermal cycling. Also,
Samples where the sum of the thickness of the roll material and Ti exceeds 40 μm (N
o. 3R, No. 4R, No. 8R, No. 16R)
Had a large variation in both the initial strength and the strength after the heat cycle due to the non-uniformity of rolling. Also, the deterioration after durability is large.

[0010]

[Effect] The manufacturing method according to the present invention is an industrially useful invention because it can obtain a joined body with little dimensional accumulation and high dimensional accuracy.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a manufacturing method of the present invention.

FIG. 2 is an enlarged view of a main part A of FIG.

FIG. 3 is a diagram showing a method of a cantilever bending strength test of a joined body.

[Explanation of symbols]

 1, 11 Joined body 2, 12 Metal 3, 13 Ceramic 4, 14 Roll material 5 Jig and tool 6 Rhodare 7 Weight 8 Chuck

Claims (2)

[Claims] 1. A metal foil and a non-metal, a Ti foil and a roll material or T.
In a method for manufacturing a joined body, in which a clad material of an i-foil and a roll material is used for joining, a total thickness of the roll material and the Ti foil is 40 μm when the thickness of the Ti foil is 2 μm or more and 10 μm or less. A method for producing a metal-nonmetal joined body characterized by the following: 2. The alloy is an Ag-based or Ag-Cu-based alloy,
It is an Ag-Pd type alloy or an Ag-Cu-In type alloy, The manufacturing method of the metal-nonmetal joined body of Claim 1 characterized by the above-mentioned.