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How is something hard but brittle?
Brittle means something breaks very suddenly. The opposite (ductile) means it will deform before it breaks. Hard means it will resist being stretched or bent.
How can a metal be hard and brittle at the same time?
Coming back to the question……a metal can be hard and brittle at the same time. For example when steel is tempered it becomes hard and brittle. To remove the brittleness the metal is carefully heated and then allowed to cool down. Like life is hard but trust is brittle.
Does harder mean more brittle?
Harder, stronger metals tend to be more brittle. The relationship between strength and hardness is a good way to predict behavior. Mild steel (AISI 1020) is soft and ductile; bearing steel, on the other hand, is strong but very brittle. Brittle materials do not undergo significant plastic deformation.
What does hard brittle mean?
adjective. An object or substance that is brittle is hard but easily broken.
Are Diamonds tough or hard?
Diamonds are among the hardest substances known to man, it is incredibly difficult to scratch a diamond. However, while a diamond is hard it is not tough. If you took a hammer to a diamond it would shatter, which demonstrates that not all materials that are hard are also tough.
Are Diamonds tough?
As the king of the Mohs scale, diamond is considered the “hardest” mineral. But this measure of hardness is just looking at its ability to scratch, or cut, another substance.
Is diamond hard or tough?
Hardness: A material’s ability to withstand friction, essentially abrasion resistance, is known as hardness. Diamonds are among the hardest substances known to man, it is incredibly difficult to scratch a diamond. However, while a diamond is hard it is not tough.
What makes diamonds so hard?
The crystallized form of carbon created from extreme pressure and heat leads to the creation of diamonds. Diamonds are incredibly hard because they have crystallized in a particular atomic shape that resulted from heat and pressure on earth at a depth of 140 to 150 kilometers.
Why is the diamond hard yet brittle?
Diamonds are brittle precisely because they are so hard! Hardness is the ability of a material to resist plastic deformation. That is, its ability to resist scratching or denting. Atoms in diamond are held together by extremely strong covalent bonds, making them extremely hard.
Why is diamond so hard?
The molecular structure of a diamond makes it hard, as diamonds are comprised of carbon atoms linked closely together in a lattice structure.
What are the hardest gemstones?
Hardest Gemstone. The most popular and hardest gemstones on earth are diamonds. No other gemstone or even ‘stone’ that is harder than diamond on earth and diamond can only be polished or cut by another diamond itself. However, diamonds and many other “hard” gemstones can chip. Although they are very hard but don’t forget they are also brittle.