The high-purity slender single crystal grown under controlled conditions has nearly complete crystal structure, and does not contain crystal structure defects such as grain boundaries, subgrain boundaries, dislocations, cavities, etc. Its strength is close to the binding force between adjacent atoms. Taking SiC crystal whisker as an example, its tensile strength is greater than 27 GPa and its modulus is greater than 500 GPa. Because the crystal structure is complete. crystal whisker not only has unusual mechanical properties, but also has significant changes in electricity, optics, magnetism, ferromagnetism, dielectric, conductivity, and even superconductivity.
Fundamental of Material Science -> Structural basis of materials