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There seem to be several materials colloquially called "carbide". The one in this article is (I assume) Tungsten carbide. The one I first thought of when reading the article (being old enough to have used a carbide lamp while visiting a cave) is however https://en.wikipedia.org/wiki/Calcium_carbide. Any more candidates?

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There's a whole variety of carbide matrices/coatings used for insert-tooling for machining. They change the binder and coating to alter the properties a bit. TiC (titanium carbide), Ti(C)N (titanium carbide-nitride), TiAlN (titanium aluminum nitride), etc. The tend to all be referred to as 'carbide inserts' unless you're distinguishing between each other specifically.

Pretty cool stuff!

Here's a fun, hand-wavey description of the process from Kennametal (a popular manufacturer of carbide insert tooling): https://www.youtube.com/watch?v=Vfc9cQaE8-g&t=480s

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