Silicon Carbide · Product form
Silicon Carbide Ceramic Component
I have a ceramic part drawing. Who can press, sinter and diamond grind it to tolerance?
What it is
Machined or near-net ceramic part made to a drawing: radome, nose cone, seal face, bearing, nozzle or bracket. Almost always finished by diamond grinding after firing, because sintering shrinkage is too large to hold tolerance directly.
- Typical dimensions
- Made to the part; envelope limited by press and kiln size.
- Also known as
- ceramic part, radome, nose cone, seal face, custom ceramic
Suppliers
Grouped by what they actually are. A mill and a distributor answer different needs.
Mills and producers 5
Companies that manufacture this form. Mill direct means longer lead times and mill minimums, with full melt traceability.
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Aperture Optical Sciences Verified25 mm to 800 mm
Silicon carbide mirror substrates and optostructures. Recorded as a ceramic component rather than an optical window on purpose: SiC is opaque and is used here as a stiff, thermally stable REFLECTOR, not as a transmitting window. Flats, spheres, aspheres and integrated optostructures from 25 to 800 mm in CVD, reaction bonded, chemical vapour conversion and carbon-reinforced SiC. AOS SOURCES the blanks rather than making the material, so the substrate supply chain is a separate question.
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CoorsTek Reportedsource
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Entegris, Inc. Reported
Silicon carbide mirror substrates and optostructures. Recorded as a ceramic component rather than an optical window on purpose: SiC is opaque and is used here as a stiff, thermally stable REFLECTOR, not as a transmitting window. SUPERSiC mirrors and mirror substrates made by chemical vapour conversion, allowing highly lightweighted closed-back geometry. Cryo tested to 20 K with minimal wavefront error change. Which US plant produces these is not established.
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PremaTech Advanced Ceramics VerifiedCVD SiC
Machined components from high-purity and CVD silicon carbide.
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Hexoloy sintered silicon carbide for wear and seal applications.
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Production methods
The same form, purchased as tolling on your own material.
Pressing and Sintering 2
Compacting ceramic powder by uniaxial, isostatic or hot pressing, then firing below the melting point so particles bond and the body densifies. The part shrinks substantially during firing, which is why almost nothing comes out of a kiln at final dimension.