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by aifooh7Keew6xoo
915 days ago
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https://en.wikipedia.org/wiki/Nitride > Like carbides, nitrides are often refractory materials owing to their high lattice energy, which reflects the strong bonding of "N3−" to with metal cation(s). Thus, cubic boron nitride, titanium nitride, and silicon nitride are used as cutting materials and hard coatings. Hexagonal boron nitride, which adopts a layered structure, is a useful high-temperature lubricant akin to molybdenum disulfide. Beyond that, when it comes to cutting tools in particular, there's often interesting solid phase and surface chemistry with layered gradients of oxynitrides forming at depth from the working interface that have similar properties to the base nitride and absorb energy through multiple phase changes and chemical dissociations before ultimate mass reduction, extending the life of the working surface |
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