About Amorphous Material Properties

Characteristics of amorphous material As a kind of rigid solid with a special structure, metallic glass has higher strength than ordinary metals (such as amorphous Fe80B20, the fracture strength σF is 37kgf/mm, which is more than seven times that of general structural steel); and the strength The size effect is small. Its elasticity is also better than ordinary metals, and its bending deformation can reach more than 50%. The hardness and toughness are also very high (Vickers hardness HV is generally around 1000~2000). The corrosion resistance of low-chromium-containing iron-based metallic glass (such as Fe27Cr8P13C7) is far better than that of stainless steel. Due to the long-range disorder of the atomic arrangement, the contribution of phonons to the scattering of conduction electrons is very small, so that the resistivity is very high, generally above 100μΩ·cm at room temperature, and the temperature coefficient of resistivity is very small (less than ±10K); It has high residual resistance at 0K. In some amorphous alloys (such as PdSiCr), the resistance has a minimum value when the resistance temperature curve T=Tm, when T