Dealing with silicon carbide...

[Externet]

Hi.

Trying to build a box/vessel made of silicon carbide, about 12 cubic inches capacity (~125ml). Will be exposed to 300 degrees C.

Can be a cube,

Can be a cylinder,

Can be a pyramid,

Can be cup shaped but crucibles are too expensive to play with,

 

Can be made of thin ~3mm 'boards' of grinding disc material like this :

---->https://www.forneyind.com/store/detail/695/masonry_concrete_asphalt_cutting_type_1/6620/cutting_wheel_masonryasphalt_type_1_14_x_532_x_20mm_arbor_c24r-bf/

But cutting its material off to form/make the sides of the box has to be mission impossible.

 

Can be made of carbide sanding paper/cloth, but the backing would burn unless there is one that won't,

 

So far the simplest seems two of these 'mouth-to mouth':

---->http://www.pferdusa.com/photos/1000/206/ETT_C_30_Q_SG.jpg

 

Any suggestions, please?

 

 

[Enthalpy]

Silicon carbide exists as a compact material. The linked examples are agglomerated, hence they would leak.

 

Cutting SiC should be avoided, yes. You better sinter it from the beginning in its shape.

 

Are you sure you want SiC? Many ceramics exist, and 300°C is nothing for them. The most common (after clay and porcelain...) is alumina. Zirconia is rather common as well. Alumina exists as a powder that you mix with water (just like Portland cement) and mould in the final shape.

 

Slightly easier than compact SiC, but damned expensive as well, are carbon fibres in a silicon matrix. Carbon cloth is put in shape, liquid silicon is poured to soak it and maintained for some time. SiC forms by dissolving some carbon. Brake materials for Porsche are made that way. Available on request, we paid like 200€ for each 10mm*50mm*300m part in a previous job.

[Externet]

Thanks.

Solved... this, made into a roll ----> http://ecx.images-amazon.com/images/I/61YVaAYcaIL._SL1280_.jpg

 

Sanding screen by 3M ----> http://www.handymanclub.com/Portals/0/Project%20photos/silicone-carbide-screen.jpg