Tape, strip, foil tantalum
Tantalum is heat — resistant and refractory metal is solid yet plastic like gold. The temperature of its melting point of 2996 °C, a density of 16.6 g/cm3, It is chemically inert. At ordinary temperatures it is stable in air. Oxidation starts above 280 °C. a Characteristic feature of tantalum is its ability to absorb nitrogen, hydrogen and oxygen. The hydrogen is absorbed with a maximum speed at a temperature of almost 500 °C, with the formation of hydrides. The absorbed hydrogen informs metal fragility, but upon further heating above 600 °C in vacuum, hydrogen is released almost all, and tantalum restores the original mechanical properties. The absorption of nitrogen begins at 600 °C, when a stronger heat is generated nitrite, which melts at t° 3087 °C.
Tantalum does not form toxic or explosive compounds in the work area, therefore, refers to the IV category of danger. Sheet, foil and strip of tantalum produced by rolling shtabikov obtained by sintering a powder of tantalum (after carbon). The manufacture of the tape normalized GOST 15 515−70 thickness of 0.05−2 mm with deviation of 0.01−0.1 mm in the direction of decreasing thickness. If necessary, the tape thickness of 0.1−0.5 mm can be supplied with a length of about 100 meters. Its surface is smooth, with visible welds. When the density of tantalum is 16.6 g/cm3, the weight of the rental, depending on thickness ranges from 0,5 to 18 kg/sq. m. the tantalum sheets dimensions: 5 mm in thickness, 500−800 mm in width and 500−2000 mm in length. The permissible deviation of the length of + 20 mm. Tantalum sheets are manufactured in accordance with GOST 492−73. Due to the fact that the properties of sheets of tantalum directly depend on the impurities, developed strict standards of quality control. According to GOST 18 904.6−89 the proportion of such elements as aluminum, vanadium, iron, calcium, silicon, magnesium, manganese, copper, Nickel, tin, titanium, chromium, zirconium in pure tantalum should not exceed tenths of a percent.
Tantalum foil and sheet
|Type||Thickness, mm||Deviation, mm||Width, mm||Deviation, mm||Length, mm|
|Foil||0,01 -0.03||±0,0002||30−400||+1||up to 500|
|Foil||0,04−0,09||±0,0004||30−400||+1||up to 500|
|Foil||0,1−0,2||±0,02||30−400||+2||up to 500|
|Foil||0,25−0,4||±0,02||30−400||+2||up to 500|
|Foil||0,5−1||±0,04||30−400||+2||up to 500|
|Sheet||1,2−1,9||±0,09||500−800||+3||more than 500|
|Sheet||2−4,9||±0,12||500−800||+3||more than 500|
|Sheet||5 mm or more||±0,19||500−800||+5||more than 500|
The most frequently tantalum sheets used in engineering, petrochemical, aerospace, metallurgy, military-industrial complex. Tantalum alloyed with the heat resistant and corrosion resistant alloys, foil is used for cladding. Developed a method of coating the layer of tantalum with different thicknesses of large products — pipes, crucibles, sheets, parts of jet engines. Interestingly, the strength of the tantalum coating Brinell equal to 180−200 kg/sq mm, while the technical strength of tantalum sheet is 50−80 kg/sq. mm. Coating the tantalum sheet improves heat shells penetration. In electrical engineering produces high-capacity capacitors, the surface of the sheet obtained by powder metallurgy porous, which is ten times increases the contact area with the electrolyte. Tantalum tape demanded by instrumentation and electrical engineering for the production of heaters with stable characteristics. Often these elements are made of tantalum tape, the thickness of which is 5−20µm. Biological inertness of tantalum allows you to use tape and foil in surgery for fastening tissue, the overlay patch and the production of prostheses For the same purpose suitable tantalumniobium alloys.
Supply certified products of tantalum and its alloys. The specification included data on the percentage composition and mechanical properties of products. We can easily buy in bulk any semi-finished products for large-scale production. We also work with retail buyers. A high level of service and speed of service are the face of our company.
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