Products for High Temperature Applications
We supply heat resistant products from molybdenum, tungsten, tantalum, and engineering ceramics.
Gammatec Engineering GmbH specialises in Powder Metallurgy technology. We advise you about the manifold chances and opportunities of sintering technology, manufacturers, materials, processes, products, properties and applications.
Molybdenum is a refractory metal used in high temperature furnace technology and in technical processes. Besides pure molybdenum we also supply molybdenum alloys such as Mo/La and TZM-Mo for example. Please enquire for more alloys.
Our highly temperature resistant metallic material Mo/La remains fine-grained, ductile and dimensionally stable even after long-term use in high temperature processes. Lanthanum oxide stabilizes the grain boundaries and hinders grain growth at high temperatures. Therefore, molybdenum doped with lanthanum oxide may be used at temperatures above 1500°C.
COMMON PRODUCTS AND SHAPES
- Molybdenum foil 0.015 to 0.1 mm thickness, max. width 110 mm;
- Molybdenum foil 0.15 to 0.2 mm thickness, max. width 200 mm;
- Molybdenum sheet 0.25 to 1.5 mm thickness, max. width 500 mm;
- Molybdenum plates, max. width 500 mm;
- Molybdenum rods, max. length 2000 mm;
- Molybdenum square bars, max. length 1000 mm;
- Molybdenum tubes, max. length 1000 mm;
- Molybdenum wire on coil;
- Molybdenum heating wire and heating elements;
- Molybdenum crucibles for growing single crystals;
- Molybdenum sputtering targets;
- Molybdenum glass melting electrodes to customer specifications;
- Molybdenum boats, trays and setters riveted;
- Molybdenum bolts, nuts, threaded pins;
- Furnace components to customer specifications;
- Customer specified turned and milled parts.
Tungsten (W) – tantalum (Ta) – niobium (Nb)
If even molybdenum cannot withstand the high temperatures, tungsten, tantalum or niobium are possible alternatives. Due to its high density, tungsten is also used for balancing weights and for shielding ionising radiation.
We provide expert advice in the selection of materials and supply you with engineering ceramics for the most diverse applications. Among the oxide ceramics, the most commonly used material for high temperature and wear applications is alumina, but we also have zirconia in various grades on offer. In addition, we also supply silicon carbide, silicon nitride, SiAlON, aluminium nitride and other materials on request.
Aluminium oxide (Al2O3) is characterised by high hardness and resistance to abrasive wear, excellent chemical resistance and heat resistance. Its excellent price-performance ratio makes it attractive for many applications.
Zirconia stabilised with yttria (ZrO2/Y2O3) has high strength and toughness at low temperatures. Because the thermal expansion is similar to that of steel, it is often used as a shrink-fit insert in steel tools.
Silicon carbide (SiC) is extremely hard and wear resistant even at high temperatures.
Silicon nitride (Si3N4) has excellent thermal shock resistance and is resistant to liquid aluminium. Its extremely low coefficient of friction makes it suitable as a material for high-quality ball bearings.
SiAlON are a specialist class of high-temperature refractory materials, with high strength at ambient and high temperatures, good thermal shock resistance and exceptional resistance to wetting or corrosion by molten non-ferrous metals. They have found extensive use in non-ferrous molten metal handling.
Aluminium nitride (AlN) offers itself as a material for heat sinks in electronics due to its high thermal conductivity.
COMMON SHAPES AND DIMENSIONS
- Plates up to 300 mm width and length, max. thickness 10 mm
- Discs up to 350 mm diameter and up to 10 mm thickness
- Tubes with 1 or more bores up to 4 m length
- Trays and boats
- Crucibles and bowls
- Slurries for spraying and brush application