Diamond has the highest bulk modulus measured, and is the stiffest and also the hardest material known. Our recent pressure-volume measurements indicate that the high-pressure phases of ruthenium and hafnium dioxides formed in a diamond anvil cell at pressures greater than 12 and 42 GPa, ...
scientists have calculated that a material called wurtzite boron nitride (w-BN) has a greater indentation strength than diamond. The scientists also calculated that another material, lonsdaleite (also called hexagonal diamond, since
carbon(iv) nitride c3n4— a new material harder than diamond?ion C3N4 having a β-Si3N4 structure, which should have the hardness and stability of diamond. Rdoi:10.1002/anie.199315801Prof.LaboratoriumDr.LaboratoriumWolfgangLaboratoriumSchnick
"We would like to find something harder than a diamond. If you could find other materials that are hard, potentially you could make them cheaper. They might also have useful properties that diamonds don't have. Maybe they will interact differently with heat or electricity, for example." ...
But for materials that are purportedly harder than diamond, using such relative criteria become problematic, which in turn raises the question of what it means — in quantitative terms — for a material to be harder than diamond. This question was the subject of intense debate amongst delegates ...
New material may be harder than diamond Researchers at Northwestern University's materials science and engineering laboratories have developed a new material that may be harder than diamond, the hardest known substance. Preliminary evidence indicates that a carbon nitride, 尾-... J Haggin - 《Chemica...
A prime contender for a material harder than diamond is lonsdaleite. Like diamond, lonsdaleite is made up of carbon atoms, but they are arranged into a hexagonal crystal structure instead of a cubic one. "Lonsdaleite is very puzzling," Asimow told Live Science. Until recently, it had been fo...
Despite its theoretical superiority, Lonsdaleite hasn’t replaced diamond in industrial applications. Diamond remains the hardest known material that can be reliably produced and used. The complexities of synthesizing pure Lonsdaleite, along with its rarity in nature, mean that for now, diamond is stil...
The new carbon crystals were too small to test for precise hardness but they are known to be harder than normal diamonds because the researchers found them by using a diamond paste to polish a slice of the meteorite. The crystals were raised more than 10 µm above the polished surface, ...
is made up of just two sheets of graphene, upon a silicon carbide substrate. It is described as being as light and flexible as foil – in its regular state, that is. When sudden mechanical pressure is applied at room temperature, though, it temporarily becomes harder than bulk diamond. ...