JPS59145751A - Alloy for metallizing ceramic - Google Patents

Abstract

PURPOSE:To obtain an alloy for metallizing ceramics by ultrasonic vibration with favorable wetting properties by adding Cu or Ag to prescribed percentages of Zn and Al. CONSTITUTION:Ceramics 2 is immersed in a vessel contg. a molten alloy 1 consisting of, by weight, 15-99.5% Zn, 0.05-45% Al and 0.05-40% Cu, 0.05-20% Ag or 0.05-5% Si while in contact with an ultrasonic vibrator 4. Ultrasonic vibration is applied to the vibrator 4 to metallize 3 the immersed surface of the ceramics 2. The metallized surface is joined to a metallic substrate 5 in the molten state. Said alloy can metallize the ceramics with favorable wetting properties and has high work efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alloy for metallizing ceramics using ultrasonic waves.

Conventionally, methods such as the Telefunken method, active metal method, and hydrogen compound method have been used to metallize ceramics, but all of them are processed at high temperatures.1For example, in the Telefunken method, a metal film is formed on the ceramic in advance in a high-temperature furnace. After that, pot brazing requires high-temperature treatment and complicated operations, such as joining the metal with a method such as pot brazing, and requires high-temperature furnaces, vacuum, or gas surroundings, which increases work and costs. In this respect, it has been difficult to use it for purposes that have considerable added value.

The present invention is intended for use under conditions of about 300 to 400°C or higher, but it is easy to metalize, requires simple equipment, and can be used with relatively large ceramics. This was developed to facilitate the production of composites.

That is, 1 weight ratio Znl 5-99.5%, A/0
．． It is a metallized alloy for medium temperature use with a relatively high melting point of about 400°C to 500°C and a considerably strong strength of < + Cj.
It has a shear strength of about 2 kg/- to 6-kg/+nIR depending on the ratio of u. Examples include 9 For example, 65 Zn 25AI! In the case of an alloy for metallizing ceramics having a composition of 100 u, as shown in FIG.
The shear strength when the immersion surface of the ceramic 2 is metallized by immersing the lzoi and applying ultrasonic vibrations of 18 kJ (lkW, z), and then lip-bonded immediately to the metal substrate 5, for example, C1^, is 1. As shown in Figure 2, the shear strength varies depending on the temperature of molten metallized alloy 1 and the immersion time.
℃, the shear strength is high, and the immersion time is 5 seconds.
'kg/-strong, 6 kg/- for 120 seconds of soaking time
It shows the largest value of just over mA, and when the melting temperature is 400℃, the difference in shear strength due to immersion time is less than 10%, and is approximately 4.
It shows the value of kg/-strong.

Next, the shear strength was measured for a trial metallized using molten metallized alloy 1 having a composition of 9495 Zn 5 Al O, 05Qu in the same manner as above. As shown in Figure 3, the temperature of molten metallized alloy 1 was 450°C.
The shear strength in the case of
By changing the ratio of Ou, from 2 kg//- to 6
．． A shear strength of up to 5 kg/- can be determined as required.

As mentioned above, in the case of Zn Al Ou gold alloy, 40
Metallized alloy for medium temperature near 0℃, shear strength is 4 ~
It is possible to metalize ceramics with a culm weight of 6 kg/-.

Next, A and g can also be used in place of the above Ou. That is, 'Zn 35-9'? , 5%, Al 0
．． In metallized alloys containing 0.05 to 45% Ag and 0.05 to 20% Ag, the shear strength is slightly lower, but the wettability and workability are good. For example, 80. Zn-10AI
The shear strength in the case of IQ Ag is 5.5 kg/-, which shows the same temperature and shear strength as the above-mentioned Zn Al-=Qu, and can be used for metallization when used under the same conditions as above.

Next, instead of Ou, Sj can also be used. In this case, the composition is zn50-995%, A10
0.05 to 45%, Si 0.05 to 5%, and although the melting point is slightly lowered, the corrosion resistance is improved.

In the example, the shear strength in the case of the composition of 77zn 20AJ 3Si is about 4 kg/-, which is slightly lower than that of O or Ag, but it is characterized by improved corrosion resistance.

Next, to metalize ceramics with the metallized alloy of the present invention, 1. For example, as shown in FIG. The ceramic 2 is brought into contact with this and immersed, and the ultrasonic vibrator 4 is exposed to the
By applying ultrasonic waves of kW/13 KHz, metallization 3 is formed on the immersion surface of ceramic 2, and the metallization 3
In the molten state, it is immediately welded to, for example, a metal substrate 5 as shown in FIG.

In this case, bonding can be facilitated by preheating the metal substrate 5 to a temperature close to the melting temperature of the metallized alloy I, if necessary, or by using Tx.

Note that the metallizing alloy of the present invention can be easily metallized on all kinds of ceramics because it is metallized onto the surface of the immersed ceramic using ultrasonic vibration.
For example, it has the characteristic that it can be easily metalized in sizes ranging from porous materials such as refractory bricks to honeycomb-like ceramics.

However, since metallization can be performed at a relatively low temperature, cracks in ceramics due to differences in thermal expansion, which are a problem when metallizing ceramics, are less likely to occur, and relatively large objects can be easily metalized. In actual use, for example, as shown in FIG.
．． 2, which is metallized by ultrasonic bonding using the metallized alloy according to the present invention, the bonding strength of the Zn-based alloy is strong and the metallized bonded part does not peel off during use (A12072 will wear out completely and will last for a long time. After using it for a while, I got amazing results.

Below 1-. The ceramic metallized alloy of the present invention can be produced by ultrasonic vibration at relatively low temperatures.

It is a metallizing alloy that can be metallized into ceramics, and it can be used satisfactorily for assembling wear-resistant parts in terms of mechanical strength and heat resistance. Since metallization can be performed at a relatively low temperature using ultrasonic waves, there is no need for a high-temperature furnace or gas atmosphere, and the equipment is simple and economical.

It has many features, such as metallization at low temperatures and less cracking due to the difference in thermal expansion between ceramics and metals.

[Brief explanation of the drawing]

FIG. 1, FIG. 4, and FIG. 5 are illustrations for explaining the present invention. Figures 2 and 3 are diagrams showing the relationship between immersion temperature and shear strength with immersion time. ( is alloy for metallizing ceramics, 2 is ceramic, 3 is metallization welding, 4 is ultrasonic vibration T-, 5 is metal substrate, 6 is belt cleaner. 3 Figure 0 20406080 +00120140 Soaking time c
seconds)

Claims (3)

[Claims] (1) Zn 15-99.5% by weight, h, zO
, 05-45% and CuO, 05-40%. Alloy for metallizing ceramics using ultrasonic vibration. (2) Weight ratio Tezn 35~'? 9.5%, A40
．． It is characterized by a composition consisting of 0.05% to 45%, and 0.05% to 20% Ag. Ceramic metallization alloy by ultrasonic vibration. (3) Weight ratio "TeZn 50~'?'?, 5%,
AI! 0.05-45%. An alloy for metallizing ceramics using ultrasonic vibration, characterized by a composition consisting of 05 to 5% SiO.