SU996499A1 - Cermet material based on nickel for soldering metal with glass - Google Patents

Description

The invention relates to metal-ceramic materials used as an intermediate layer for soldering metals to glasses.

Metal-ceramic material 1 is known for soldering metal with glass of the following composition, in, wt.%:; Glass. 5-12

Iron88-95,

The disadvantages of this material are the fabrication capacity and the narrow interval of consistency of the coefficients of thermal expansion.

The closest to the invention in its technical essence and the achieved effect is nickel-based t2I metallo-ceramic material for soldering metal with glass of the following composition, in wt.%:. Nickel60-70

Chrome 11-15

Silicon 3-6

Iron3-5

Bor3-7

Glass1-7

Clay3-5

However, in the case of a known cermet material, the strength of the combination of metal with low-melting glasses is the strength. The strength of the combination of metal with low-melting glass using a known cermet material. The determined impact test method (operation, causing visible damage to glass fused with metal) is 0.15-0.16 J.

The purpose of the invention is to increase the strength of the combination of metal with light alloy glasses.

To achieve this goal, a nickel-based metal-ceramic material for soldering has been proposed. metal with glass, containing nickel, chromium, silicon, iron, boron, glass, and clay, which, according to the invention, additionally contains carbon in the following ratio of components, in wt.%:

20

4-6

Chromium

0.1-0.6. Silicon 0.1-0.6 Iron

3-5 Bor

0.2-0.6

Glass

25 0.2-0.6 Carbon

3-5 Clay Nickel Else

Moreover, the cermet material contains carbon in the form of lamp soot.

Example. The proposed cermet material based on nickel for soldering metal to the stele is obtained as follows.

The powders of the technically pure components are mixed with moistening with water until the formation of a slurry with a volume weight of 2.4 g / cm and kept in a glass vessel for 1015 hours. Bentonite clay is used to prepare the material. The slurry is applied with a brush to a pre-cleaned metal surface, dried and calcined in a muffle furnace in an atmosphere at 900 ° C for 8-15 seconds.

After cooling, glass prepared for bonding with metal was applied to the surface prepared in this way and heated in a furnace to the glass reflow temperature.

In the quality of low-melting glass. Glass of the following composition is used, in mole fractions: Na20-BCO-5Si02.

Glass prayer temperature is € 57 ° C.

A test of the strength of a metal spa with low-melting glasses was carried out by testing for an impact. The strength parameter of the spa is work that causes visible damage to the glass that is soldered to the metal with the help of the proposed metal-ceramic material.

The proposed cermet material has the peculiarity of changing the strength of a spa with glasses, depending on the firing temperature of the material. At elevated firing temperatures, it gives a strong weld with refractory glasses, at low temperatures with fusible glasses.

The table shows the compositions of the proposed cermet material based on nickel and the strength of the combination of metal with low-melting glass, determined by means of an impact test.

As follows from the data in the table, the strength of the combination of metal with low-melting glasses when using the proposed cermet material in comparison with the known increases to 70%.

The use of the proposed cermet material improves the strength of the combination of metal with low-melting glass, and it can also be used for soldering refractory glass, which saves labor, electricity and production space.

Claims (2)

1. Nickel-based metal-ceramic material for soldering metal with glass, containing chromium, silicon, iron, boron, glass and clay, characterized in that, in order to increase the strength of the combination of metal with low-melting glasses, it additionally contains carbon in the following ratio of components, weight.%: Chrome 4-6 Silicon, 0.1-0.6 Iron 0.1-0.6 Bor3-5 Glass 0.2-0.6 Carbon 0.2-0.6 Clay3-5 Nickel Else 2. The material of claim 1, characterized in that it supports carbon in the form of lamp soot. i, Sources of information taken into account in the examination 1. USSR author's certificate number 198585, cl. From 03 to 27/04, 1966. 2. USSR author's certificate 0 No. 444744, class From 03 to 27/04, 1973.