Back to all

SiC Coated Graphite – Thermic Edge Coatings

SiC 3 Coating Blog Featured Image

SiC Coated Graphite Elements

We are an independent supplier of SiC Coated Products to many industries.  Whilst we are able to provide batch SiC coating in volume we also recognise the need for smaller volume requirements from R&D establishments and departments. 

Based in the UK we export around 90% of our SiC Coated Graphite around the world.

In this article, we focus on Silicon Carbide Coated Elements which will be offered as flat elements or as assemblies as required for substrate heating, illustrated below. 

SiC Coated Graphite

We have developed a range of high purity silicon carbide coated elements from 1” to 8” as part of a standard range.

The elements are compatible with UHV heaters, High Vacuum heaters and Inert Atmosphere heaters. The elements will operate consistently at 1450°C and for short periods up to 1600°C.

Thermic Edge Ltd are the sole manufacturers of SiC3, short for cubic silicon carbide. The process is unique as it combines a well defined crystal size, isotropic structure and low surface roughness. The high growth rates achieved by SiC3 ensures that the product remains cost effective. Layer thickness can be varied but typically a layer of 80 – 100µm is achieved.

The SiC Coating has excellent oxidisation, corrosion and chemical resistance.  The high purity SiC coating is achieved by using only the purest of ingredients in the coating process.

The combination of Isotropic graphite and our SiC Coating is stable and uniform at high temperatures. 

As we know, graphite oxides in air starting around 450°C Therefore, we have designed an element assembly whereby the power connecting is removed from the hot zone to ensure that the exposed graphite (required for the power connection) will be below the oxidisation temperature.

It is possible to order bespoke legs with a standard element to suit your heater requirements.

Examples of SiC Coated Graphite Applications

Susceptors used in processes that form the epitaxial layer on semiconductor wafers with heating element used in substrate heating

The coating can be used in semiconductor, aerospace and heating technologies. It will provide a high purity and impervious layer on graphite, porous ceramics and composites. The combination of graphite selection and graphite machining expertise, developed by Thermic Edge, will ensure that customers experience optimal support for various critical components within these industries

If you want to know more please contact us through our website or just give us a call to discuss High purity Sic Coating. 

Find Out More About Thermic Edge SiC Coatings

You might also enjoy

Cubic Silicon Carbide Coating
Thermic Edge Coatings: Ten Years of Independent Ceramic Coatings Expertise

Founded in 2016, Thermic Edge Coatings celebrates ten years as a specialist and independent provider of high purity ceramic coatings for high temperature and vacuum applications.

Thermic Edge Coatings operates as part of the Thermic Edge Group, which includes Thermic Edge, Thermic Edge Ceramics and Graphite, and Thermic Edge Europe.

SiC Coating
SiC vs. SiC3: The Next Generation of High-Purity Coatings

Silicon Carbide (SiC) has long been the gold standard for protective SiC coatings in high-temperature, corrosive environments. Its exceptional hardness and thermal properties make it invaluable in industries ranging from aerospace to semiconductor manufacturing. However, for the most demanding applications, especially those requiring ultra-high purity, standard SiC coatings often fall short. Enter Cubic Silicon Carbide (SiC3).

Silicon Carbide
What is Silicon Carbide Used For?

Silicon carbide (SiC) is a compound of silicon and carbon that has gained widespread attention across high-performance engineering, materials science, and vacuum technology. Known for its exceptional thermal conductivity, chemical inertness, and mechanical strength, silicon carbide has proven invaluable in environments where conventional ceramics or metals would fail.