It’s been a while since I posted anything. I do have several partly written, but I just haven’t had the motivation to finish them. So I thought I’d just put up a quick one today.
I bought this aluminum plate with a thin layer of green resin on the surface, which was claimed to contain “12000 grit diamond,” from AliExpress. I did some testing with it on my S110V Spyderco Para Military 2 and was surprised and disappointed to find that the hone wasn’t cutting the vanadium carbides in the way I would expect.
To investigate, I sawed off a small piece of the hone for analysis. A cross section through the resin layer shows that there is plenty of abrasive, although they are too large to call “12k grit.” Also, these are some very unusual shapes for diamond particles…
Next, I did elemental mapping on that surface, to see what the various materials are.
There are three distinct materials in the cross section. The sharp-edge particles are revealed to be silicon carbide. The dark region between them shows carbon and oxygen, as expected for polymer resin. The small, bright particles are chromium oxide, explaining the green colour of the resin. I don’t see any diamonds.