3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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No porn (NSFW prints are acceptable but must be marked NSFW)
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No Ads / Spamming / Guerrilla Marketing
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Do not create links to reddit
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If you see an issue please flag it
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No guns
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No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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TL;DR: normal sand casting, using a microwave to heat up the metal inside an insulated silicon carbide crucible.
It's not, like, using the microwave to sinter a metal-powder 3D print or anything special like that.
I didn't know silicon carbide heated up in the microwave. I learned something from the article.
People often make rubies in microwaves. Microwave crucibles can get exceptionally hot.
I started watching the video on Youtube, but almost immediately switched to an older video from the same guy that went into more detail on the metal-melting part.
It's been popular for making ceramics at home in microwaves for years