DE1671265C3 - Fused alloy - Google Patents

Description

To better illustrate the invention, the aim is to achieve homogenization by melting again The following description is used. sated.

A Aufr.chmelziegierung the present invention of all alloys was tested by testing

dung proved to be particularly suitable for resistance to potassium vapor at high temperature melts of aluminum oxide ceramics, such as B. 5 doors determined. For this purpose, the alloy was airtight sapphire, and for high-purity hot-pressed aluminum together with potassium in a capsule made of carbon oxide on refractory metals, such as. B. niobium, free steel introduced and heated until at 85O ° C the tantalum and molybdenum, where it is necessary that the steam in the capsule was saturated with potassium.
Bond both mechanically strong and airtight. A hot melt alloy of the invention allows

is completed. A good helium seal between the niobium has proven to be particularly advantageous a reflow alloy containing 50 to 65% titanium and aluminum oxide and niobium and tantalum in tubes and 20 to 35% nickel as main ingredients besides or capsules.

at least one other refractory metal to create bonds between ceramics

in an amount of 5 to 30%. made of sapphire or high-purity, hot-pressed aluminum

Each of the melting alloys has a nominal 5 oxide and high melting point metals with a melting point in the range from about 1000 to 1120 ⁰ C, melting alloy according to the invention is based on the temperatures that were observed during the melting according to the melting temperature. The measured temperatures between 50 and 100 ° C above the melting point can be a little higher. the fused alloy carried out. Furthermore, the

The following table shows thirteen specific at least fused alloys during bonding games of fused alloys of the present 1 min adhered, preferably it should not be longer than Invention from which firmly melted connections are retained for 5 minutes. It is particularly beneficial fertilize between very pure aluminum oxide ceramics- melting at a temperature of approximately ken and refractory metals were produced 50 ° C above the melting point of the alloy. 25 lead, because when melting at temperatures

The alloys of the present invention may to be higher than 100 ⁰ C, for example, 150 ⁰ C, no hinleicht be made of metals or Legie- obtained by melting together sufficiently good bonding between the ceramic and the corresponding amounts of the Metali.

containing the metal components. As can be seen from the preceding,

The reflow alloy according to the invention can be produced either in an electric arc or by vacuum 3 ° Melting technology take place. The starting metals have vacuum-tight connections of high mechanical generally a high degree of purity. If that strength, which are resistant to alkali metal metal was only available as a powder, the material became vapors at elevated temperatures between high rial tabletted to the arc melting to melting metals and ceramics with high facilitate. In most cases the alloy was 35 alumina content.

Alloy components in%

Melt-No. Ti Ni Nb V Mo W Cr Al Fe Zr Mg point in ⁰ C

4 - - 3 1040

7 1050

- 10 1100

- - 5 5 1,100

- - 7 - 8 1100

- - - 2 1030 ----- 5 1020 4 - - 3 - 10 1040

1 60 30th 10 7th 2 60 25th 15th .— 3 60 33 - - 4th 50 33 10 15th 5 50 33 10 - 6th 65 20th - 10 7th 65 25th - 8th 65 25th - 9 65 25th - 15th 10 65 20th - 5 11th 50 30th 3 12th 50 28 12th 13th 50 33

Claims (4)

that contain less than 96% aluminum oxide. It is ... well known that joining metal with claim. Alumina ceramics becomes more difficult when the 1. Reflow alloy made of titanium, nickel and ** «* &*"' ^^^ f ^^ _u ^^ _d ^ fr _h XZißnSä ^ K * is a Le _£ ie. von Kerarmkte.ien m, ^ f ^ fj ^ J ₀ ./ rungslot for connecting ceramic parts with M. gc kc η η ζ c ι ch η e: t, that ™haben # ££ j ° ₅ 6 described tallteile, in addition to titanium and nickel Titanium, at least 20 / ^{N 'ck} t "l _e n _en MetS (-. A high melting point" metal such as zirconium containing At least one refractory metal is made from _{USA patent 28 47 302} 2. "Melting alloy after Anbruch 1, connecting titanium with other miles of alloy characterized by the fact that it contains 60% nickel and 30 to 40% of the metal niobium, vanadium, molybdenum as a high melting point , Tungsten, titanium next to copper silver chromium manganese, koba t s ^ nti _a r ^ium ^^ 3. Fused alloy according to claim 1 or 2, connecting ceramic with metal and with ceramic characterized in that it contains 5 to 65% titanium, besides, wöbe, which is used for joining 20 to 35% nickel and 5 to 30% of high alloy in addition to nickel and titanium 0.3 to 10 / silicon Contains melting metal. and contains carbon 4. Melting alloy according to claims 1 «o The currently available melting alloys up to 3, characterized in that they are still 0.5% in general insufficient for the Konstrukt.on contains carbon ^of airtight connections where the ceramic one High purity aluminum oxide, which also has a low resistance to alkali metal vapor with increased th temperature. These considerations are often of particular importance, e.g. B. in the construction of alkali metal vapor lamps and by For many uses today, the melting is alkali metal vapor driven power systems. Those required from metals to ceramics to make parts different from these two materials, the fused alloys of the present invention improve the direct reflow of refractory. For many purposes, the operating temperature is relative to the metals on ceramics. This is particularly true, so that the currently available materials for airtight connections of aluminum oxide of high purity for the construction of the connections on such metals by melting,
iind. Different types of melts can be used. if the metal-ceramic 35 melting alloy of titanium, nickel and a high-compound temperatures up to a maximum of 400 ⁰ C melting metal is used for the production of metals and if no alkali metal vapor is used to ceramic compounds, which is for use at height. One of these melts contains a ren temperatures are suitable.
Molybdenum-manganese metallization. According to the invention, this object is achieved by metallizing the ceramic with a molybdenum-manganese alloy, 4 <> by a melting alloy, which is followed by at least 50% which is a suitable coating of nickel or copper titanium, at least 20% nickel and at least 5% then finally one of a suitable at least one refractory metal contains. Fused alloy. Another method, which is preferably used a lot as a high-melting metal, is the production of metal niobium, vadadium, molybdenum, tungsten, chromium, aluminum-ceramic compounds by a diffusion process. 45 nium, iron, zirconium and magnesium. Titanium or molybdenum can be diffused into the ceramic and it has been found that particularly good connections are made in a hydrogen atmosphere. The metal, if the reflow alloy contains 5 to 65% titanium, is then melted onto the metallized ceramic surface with 20 to 35% nickel and 5 to 30% high melting of a suitable molten metal. the metal contains. Furthermore, in some suitable connections have also been obtained, it can be advantageous if the fused alloy between metals and ceramics without the metal still contains 0.5% carbon, in order to achieve the grain waxing step by using an active mixture during the gluing process regulate,
High melting alloy, which can react with the ceramic with a melting alloy according to the invention and forms a chemical bond. With vacuum-tight connections, the good mechatronic process, a melting can be carried out in a 55 niche strength, good adhesive strength and a high step, since the melting material so-resistance to alkali metal vapors with high probably metal as well as ceramic connects with each other. Have temperatures, especially against saturated An alloy for this purpose must generally contain potassium vapor generated at temperatures above 850 ⁰ C at least one active component, such as. B. be. It is of particular importance, titanium or beryllium, which reacts with the ceramic at the 6o that these advantages also with connections of high melting temperature. Was used so melting metals with aluminum oxide ceramics z. B. the titanium-nickel eutectic, which occur approximately high purity. Contains 75.5% titanium. With the alloy made of titanium, an inventive Melts made with a nickel eutectic are appropriate melting alloys in the case of metal-ceramic but not resistant to metal vapors at high bonds in hermetically sealed capsules in Temperature. Other alloys that also commercially present alkali metal vapors at relatively high levels are available, are generally only suitable for temperatures such. B. in alkali metal vapor Bonding of alumina-containing ceramics, charge lamps are required.