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 Post subject: CBN can abrade ceramic *micrographs inside*
PostPosted: Thu Mar 20, 2014 5:30 am 
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Joined: Mon May 27, 2013 6:39 pm
Posts: 258
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.
Image

So I grabbed a fresh roo strop , loaded her with some 45u CBN and made a few strokes.
Image
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.
Image



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 Post subject: Re: CBN can abrade ceramic *micrographs inside*
PostPosted: Thu Mar 20, 2014 11:26 am 

Joined: Thu Jan 02, 2014 12:42 am
Posts: 26
Sadden, Thanks for your work. I have a question for you in regards to this thread. I have a small Boker ceramic with a small chip. Would high grit diamond or CBN be better to fix it in your opinion? I have been putting of tying to fix it due to being new in this art. Thanks


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 Post subject: Re: CBN can abrade ceramic *micrographs inside*
PostPosted: Thu Mar 20, 2014 6:58 pm 

Joined: Thu May 24, 2012 6:20 am
Posts: 2277
Are you using the Veho?


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 Post subject: Re: CBN can abrade ceramic *micrographs inside*
PostPosted: Fri Mar 21, 2014 4:39 pm 

Joined: Fri Feb 07, 2014 4:52 pm
Posts: 204
I really love seeing these high magnification photos. Thanks for sharing for those of us who are microscopically challenged.


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 Post subject: Re: CBN can abrade ceramic *micrographs inside*
PostPosted: Fri Mar 21, 2014 4:55 pm 
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Joined: Mon May 27, 2013 6:39 pm
Posts: 258
rutcrazed wrote:Sadden, Thanks for your work. I have a question for you in regards to this thread. I have a small Boker ceramic with a small chip. Would high grit diamond or CBN be better to fix it in your opinion? I have been putting of tying to fix it due to being new in this art. Thanks

Diamond if its an option.

cedarhouse wrote:Are you using the Veho?

Yes , the 400x one.

DarkStar wrote:I really love seeing these high magnification photos. Thanks for sharing for those of us who are microscopically challenged.

Glad everyone is enjoying some of the work I have been doing



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