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Refractory

Sintering

REFRACTORY
Graphite the ideal material for Sintering

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Carbone Lorraine materials are used extensively throughout the pressure sintering industry to produce moulds for diamond saw segments, diamond core drills, ceramic cutting tool inserts, and ceramic armour plates to name but a very few.

Our advanced isostatically pressed materials provide superb performance in the presence of extremes of heat and pressure encountered during the processing of sintered products. High thermal conductivity combined with low thermal expansion coefficients impart dimensional stability essential for ceramic moulds.

Typical Coefficient of Thermal Expansion

As temperature increases to the elevated extremes of processing it is essential to the design of the mould at room temperature that the materials used present a clearly defined and stable expansion curve.

Graphite and in particular our materials concieved for this purpose assist the mould designer in this exercise offering ideal characteristics

Making your material selection

When selecting the material to be employed environmental and process parameters must be considered. We are confident whatever the values you are working with we will have a suitable material available.

Grade 2020 is the material of choice in diamond segment die bodies/punches where high electrical resistivity is needed to shorten the time to reach operating temperature. Grade 2191 is used where similar properties are required to 2020 but with higher thermal conductivity. Grade 2114 is employed where strength and density are the prime consideration.

Grades 2020 and 2191 can be machined to tight tolerances offering a good surface finish. This is ideal for ceramic dressing rolls. Ceramic tool inserts, armour plates and sputtering targets are 'classic' punch and hot die applications. 2020 is often selected here for large cross section components and 2114 or 2124 for high strength items.

Grade 2715 and 2720 with their relatively high electrical resistivity are recommended for many resistance heating applications. High operating temperatures can be achieved in shorter times using this grade within components of the mould carrying the current.

With the scope of choice trials can often be the best or only way to select optimal materials. Please call the UK sales office where our experienced service and engineering staff will be available to assist you in your material selection