准晶强化钢的研究进展

准晶体是一种具有旋转对称性的介于晶体与非晶体之间的固体。由于其特殊结构，具有较高的强度、硬度、室温脆性、不黏性、电阻率高和导电性差等特性。准晶强化钢因其准晶的大量生成，其抗拉强度可以达到3 000 MPa以上。从准晶体的发现、钢中准晶的发现开始，对准晶钢相变反应及影响因素进行了深入探讨，总结了准晶钢的特性、制备和钢中准晶本身的特性等。最后，分析了准晶钢及准晶研究现状和存在问题，并针对准晶钢的应用前景和未来的研究方向作出了展望。

Research development of quasi- crystal strengthened steel

The quasi- crystal is a rotational symmetric solid with a structure between the crystalline and amorphous state. Due to its special structure, the strength, hardness and brittleness of quasi- crystal are very high at room temperature, and its stick- ability, friction coefficient, density and thermal conductivity are low. For the quasi- crystal steel, numerous quasi- crystal precipitates are formed, resulting in the tensile strength as high as 3 000 MPa. Based on the discovery of quasi- crystal and the quasi- crystal in steel, the influencing factors on the phase transition of quasi- crystal steel are discussed, the properties and preparation of quasi- crystal strengthened steel and the properties of the quasi- crystal in steel are summarized. Finally, the present situation and existing problems of quasi- crystal steel and quasi- crystal are analyzed, and the potential applications and future research direction of quasi- crystal steel are prospected.