So earlier this evening I received a Skype from Ken asking if I had ever concluded that CBN could in fact abrade ceramic knives. This was a project I started awhile ago but lost some wind when I realized that the knife I was working on was heavily chipped out from the atomas , making further work a moot point. I had been planning on revisting this topic earlier but I just have not had the time. Now I have a wider (mostly coarser) range of diamond films , and CBN.
Back to this evening. Ken inquired regarding the issue so I told him to give me 5 minutes and grabbed the scope. Here is the factory , used and abused edge on a Stone River ceramic knife, I managed to find a spot big enough without chips to take a picture.
So I grabbed a fresh roo strop , loaded her with some 45u CBN and made a few strokes.
Looks pretty conclusive to me , those are indeed scratches from the CBN , theres actually two visible sets of scratches , one near the edge of the edge and one occupying 95% of the bevel , initially I was too steep so I used lighting to check my contact area and made the necessary adjustments.
So with that in mind here what it looks like after 5 minutes of stropping. Ignoring the fugly edge of the edge for now (I will need to go -much- coarser in order to fix all the damage this thing has) we can see that I relatively quickly removed all the factory scratches , and cutting performance , wow , it can actually cut paper now , something the knife could not do 5 minutes ago.