材料的性质取央于使原子在分子中结合的化学键。金属的延展性原于金属键。而陶瓷的优越性能(例如硬度,耐高温、耐腐蚀和耐磨损)来源于能使金属原子或金属扣非金属原子牢固结合在一起的共价键。另一方面由不同金属原子组成的金属间化合物,具有不同的化学键;某些键的性质接近金属 The nature of the material is taken from the chemical bonds that bind the atoms in the molecule. The ductility of the metal is due to the metal bond. The superior properties of ceramics, such as hardness, high temperature resistance, corrosion resistance and abrasion resistance, are derived from covalent bonds that bind metal atoms or metal non-metallic atoms firmly together. On the other hand, intermetallic compounds composed of different metal atoms with different chemical bonds; the nature of some of the bonds is close to the metal