Thread: Do diamonds wear

Originally Posted by eKretz

And our point is that it doesn't take a billion years for this to happen. Actually very little time even with a diamond plate containing thousands of diamonds used for hand lapping hones - lapping one hard Arkansas stone is enough to make a significant difference in the cutting speed of a new diamond plate.

You are verifying my point as you tell me I'm wrong. The plate IS wearing out. The DIAMONDS are not. We are in agreement. Somewhere along the lines of our discussion we created confusion. Diamonds are doing 1 of 2 things in this scenario. They are fracturing, or they are coming loose from the plate. There are no particles that can erode them, not even an ark...

Nope, diamonds wear and fracture. As said, do a quick Google search.

Or, lap an Ark with a new diamond plate…

Chipped Diamonds (the agonizing reality) 3 Examples

"Everybody knows that diamond is the hardest mineral substance on earth. So you might be wondering why we have a page about chipped diamonds. Well, the key word to focus upon here is mineral.

Diamond is not the hardest thing on earth, it is simply the hardest mineral. The reality is that you can scratch the surface of a diamond with the pop-top from a can of soda.

Right about now, your mind is probably swimming with the possibilities, so we might as well finish it off. You can actually crack a diamond trying to scratch glass! Understand that I’m not saying the old myth that diamonds scratch glass isn’t true, because it is. I’m simply advising you not to rely upon that method to determine whether a diamond is real. Holding the diamond at the wrong angle, or applying too much pressure can cleave the diamond in two. Imagine the look on little Johnny’s face when that little science experiment fails!"

Originally Posted by prodigy

You are verifying my point as you tell me I'm wrong. The plate IS wearing out. The DIAMONDS are not. We are in agreement. Somewhere along the lines of our discussion we created confusion. Diamonds are doing 1 of 2 things in this scenario. They are fracturing, or they are coming loose from the plate. There are no particles that can erode them, not even an ark...

No, we aren't in agreement. Yes, diamonds CAN and DO "erode" as you put it - actually it's abrasion, not erosion, but that's semantics. How do you think they are cut into faceted shapes? They are abraded using - wait for it - diamond dust! Or did you think that all the facets just happened to lie along the stones' natural cleavage lines? There is also a significant difference in their ability to be abraded based on the direction that they are abraded. This can be as much as a two order of magnitude difference. This is one of the reasons that the diamonds are carefully examined and oriented before they are faceted as jewels.

Originally Posted by Euclid440

or applying too much pressure can cleave the diamond in two.

Originally Posted by eKretz

How do you think they are cut into faceted shapes? They are abraded using - wait for it - diamond dust! Or did you think that all the facets just happened to lie along the stones' natural cleavage lines?

Brings to mind a show I saw on TV when I was a kid. A diamond cutter with a mallet and a wedge taking a huge diamond and cutting it into different shapes. IIRC they said that one miscue and he would end up with dust. Needed to be an expert in the field.

https://scienceofsharp.wordpress.com...eak-in-part-2/

if this perpetuates the argument , oh well, guys , if I,m drilling with a diamond bit, into rock that is under heavy pressure(10,000 feet down hole)I,m drilling into formations that are softer than my diamond bit. sometimes we loose the cutting diamonds, but this isn't to tell anyone their wrong or right, I have to change my bit because of the rounding off of the corners , so diamonds will wear down, even against a softer substrate.

now after a bit hits my doghouse its sent to the lab. there I get a report and analysis on the wear and failure points of the bit, almost always there is a heavy wear of the sharp corners.

now under normal circumstances, I agree is tough to wear a diamond in short periods of time, but they do wear. I,ll have a bit on surface hear in the next week that has to be swapped because of the wear.

but really guys is this worth arguing about? not really its just shaving! shave on my friends,( Kyle, diamonds aside, the razor is smooth still)

Tc

But if I were not arguing my tongue might get bored and decided to leave. Then where would I be?!?

Originally Posted by prodigy

https://scienceofsharp.wordpress.com...eak-in-part-2/

Are you conceding that some abrasion does occur? The linked blog post only further proves my point. Todd (an "internet" friend of mine, BTW - we've discussed this and several other of his blog posts over email quite a few times) only did a few minutes worth of break-in on the depicted diamond plate and he mentions in several places that the diamonds have been worn - or "smoothed" - at the points on the diamonds that made contact with the Shapton hone.

Now come on guys,,,,,

Prodigy,, weren't you trying to spell " Studebaker".,, ??

Originally Posted by Hirlau

Now come on guys,,,,,

Prodigy,, weren't you trying to spell " Studebaker".,, ??

Dang auto correct...