Products in Carbon Fiber-Reinforced Silicon Carbide
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SIGRABOND® Carbon Fiber-Reinforced Carbon and Graphite High-Temperature Applications Broad Base. Best Solutions.

SIGRABOND FilWound SIGRABOND® – The tailor-made composite materials for SIGRABOND is the trade name used by the SGL Group for a extreme demands high-strength composite material consisting of a carbon or graphite matrix with carbon fiber reinforcement.

SIGRABOND® Carbon Fiber-Reinforced Carbon SIGRABOND high-performance products Page 4 Selected materials from a variety of production processes Page 6 Thermal and mechanical properties Page 8 Chemical properties Page 13 High-Temperature Applications Typical components and properties Page 15 Components Made from SIGRABOND® For the chemical industry and the glass industry Page 1 7 For high-technology applications Page 19 Designing with SIGRABOND® Use / Quality assurance / Machining / Page 21 Monolithic designs Forms and Dimensions Supplied SIGRABOND Mechanical Fasteners Page 22 SIGRABOND...

SIGRABOND® High-Performance Products SIGRABOND® Standard SIGRABOND® Premium Universal semifinished material in sheet form and as profiles. Manufactured from woven carbon fabric for general-purpose use. High-rigidity semifinished materials in sheet form. Manufactured from woven carbon fiber fabric for highly stressed components. . o Furnace linings o Backing strips for sintering work o Charging systems o Support grids for chemical separation columns o Edge protection for furnace insulation systems o Charging trays o Plate heaters o Highly stressed filigree structural components o Circulation...

SIGRABOND® FilWound SIGRABOND® Customized SIGRABOND® Mechanical Fasteners Wound rotationally symmetrical components. Structural components tailor-made from carbon fibers to customers‘ specifications. Components and mechanical securing devices. o Crucibles for silicon production o Hot press dies o Heating tubes o Shafts for circulation fans o Interior linings (susceptors) o Thermocouple protection tubes o Heat protection tubes Structural packings Rocket nozzles Heater connections Covers Thrust vectoring paddle Screws Rods Threaded rods Nuts Washers Pins

Lamination and subsequent hardening, e.g. into laminates: • Wound parts • Shaped items SIGRAFIL® C SIGRATEX® fabrics SIGRATEX® prepregs Binders R esins / pitches Phenolic and furan resins; pitches with different softening points for various uses Final treatment Thermal finishing stages Manufacturing process Thermal finishing stages • Carbonizing • Graphitizing Final treatment Mechanical processing, finishing, e.g.: • Coating • Silicon carbide coating • ubsequent cleaning S to high purity levels • Impregnation Thermal and mechanical properties of selected SIGRABOND materials As the range of...

Selected Materials from a Variety of Production Processes The individual properties of SIGRABOND are determined by various factors, namely the type of fiber, fiber content, fiber arrangement, matrix materials, layer buildup, densification, thermal treatment and any upgrading. Carbon fiber-reinforced carbon (C/C) can thus be adapted to any individual profile of requirements or desired component design. Only the most important classes of raw material and process steps are shown in the production scheme opposite. The thermal treatment steps involve baking at around 1,000 °C and graphitizing at...

Heating elements made of SIGRABOND Premium Thermal expansion SIGRABOND Premium Linear coefficient of thermal expansion (a) of SIGRABOND Premium; measured parallel to and perpendicularly to the plane of the laminate

SIGRABOND Standard SIGRABOND Premium SIGRABOND Premium Z Electrical resistivity Tubes with different winding patterns have very different electrical resistivity values even when other production parameters are identical, e.g. number of densification processes and treatment temperature. The less the fibers are aligned with the axis of the tube, the higher is the resistivity. Electrical resistivity The characteristic paths of the curves for various grades of material are shown in the adjoining figure. The curves are unaltered by repeated heating. The highly graphitized material grade Premium...

Circulation fan made of SIGRABOND Premium and SIGRABOND FilWound Resistance to temperature fluctuations SIGRABOND has better resistance to fluctuations in temperature than most other ceramic materials and also metals. Such resistance is a key requirement for the successful use of this class of materials in hightempe­ature applications. r Dynamic strength One special feature of SIGRABOND is its dynamic strength at high service temperatures. After 106 to 107 load alternations the recorded decline in its initial strength is only some 5 %.

Unlike all other ceramic and metallic high-temperature materials, carbon fiber materials increase in strength with a rise in temperature. At high temperatures the materials are in a largely stress-free state. As they cool, the materials undergo a continuous build-up of internal stresses. These are additional to any extraneous stresses. They result in low strength at room temperature but high strength at 1,000 °C or 2,000 °C, for example. Properties at high temperatures Hot bending strength Typical hot bending strength values of various high-temperature materials SIGRABOND Premium SIGRABOND...

Charging grid made of SIGRABOND Premium Oxidation behavior SIGRABOND is used mainly in vacuum or protective gas. Oxidation occurs in the presence of oxidizing gases at elevated temperatures. Its intensity is governed by the partial pressure of O2 and also varies according to the material type used. In air, oxidation begins at about 300 °C. The rate of oxidation depends also on the nature of the matrix carbon, the porosity and the catalytic effect of the impurities, as well as the rate of movement and composition of the surrounding gas – e.g. moisture content and other factors. The...

Chemical Properties Purity Essentially, C/C materials consist entirely of the element carbon. Other elements are present only as impurities introduced through the raw materials or production equipment employed. Exceptional purity is obtained in graphitiz­ ed workpieces, in other words components heated to well above 2,000 °C. At temperatures as high as this, many substances vaporize. Consequently, only a few unwanted elements remain behind in the graphitized SIGRABOND component. High purity is an advantage in the following applications: • n the semiconductor industry; I the processes are...