Recent content by PatrickP2

We all know that when we scratch a diamond with another diamond, millions and millions of covalent bonds are broken. I would like to ask what happens when a diamond burns in the atmosphere at temperatures above 750 C? Does the reaction of oxygen and carbon also break the bonds, or are we dealing...

The reason I mention this is that the acid is capable of dissolving glass. [Mild insult removed by the Mentors]

I read once that hydrofluoric acid can dissolve glass, whereas it does not react with diamond. I am curious why this is the case? Is it because the carbon atoms are so close together?

What do you mean?

Can someone explain to me why at room temperature acids cannot dissolve diamond? Is it related to its hardness?

I did a little research and found a study on the oxidation of diamond. It shows that the activation energy is 220 kJ/mol, while the pre-exponential factor is 4.3×10^11 per second. I used the Arrhenius equation and calculated that at 140 C the reaction would take place after 480 million years...

In order for a diamond to oxidize, do the covalent bonds have to be broken? What would happen if I put the diamond in an oven heated to 150 degrees Celcius? Would the reaction start and after some time the stone would disappear?

Stainless steel has a protective layer on its surface, which is 3-4 chromium oxide atoms thick. How is it possible that such a thin layer does not rub off immediately when we touch it?

Is it true that hydrogen and oxygen atoms on the surface of diamond make it have such a low coefficient of friction?

Thank you for all the replies! Could someone please explain to me what exactly the wear of rate equation means 1.2x10 -10mm3N-1m-1? How is it measured?

Of course, I realize that such exercises should be taken with a pinch of salt. However, it seems to me that the study conducted may indicate that the DLC coating can last a long time. "For instance, a covering of just 2 μm of ta-C expands the obstruction of stainless steel against rough wear...

Out of curiosity. I became interested in the topic because I read that DLC coatings with a thickness of 3 micrometers can last up to 85 years, and then I found a post on the Internet in which someone calculated that the sole of shoes shrinks by trillions of atoms every time we take a step. So...

I found a study on the abrasion of diamond against aluminum, in which the disks were loaded against the cube face of diamond in the [010] direction. The sliding speed was 88 mm s-1and the load 2.2 N. After 8000 min the scar depth was about 0,45 micrometers and the scar volume 10-5mm3. The...

I have already searched for information on this topic on Google, but I did not find an answer to my question, so I decided to write a post here and ask a question. What I'm most curious about is whether the atoms we remove with every touch of our hands can be counted in millions, billions or...

Ahh, sure! Referring to the DLC coating, here I have a study on the subject: https://www.mdpi.com/2076-3417/11/10/4445