Question

求化学文献翻译

The latest material development is aimed at further increasing the strength of such ceramics through the incorporation of fibers or whiskers.Whisker-reinforced ceramic composites hold the promise of quasi-ductile strength behavior.The whisker reinforcing principle is based on activation of the following mechanisms:transfer of stress from the matrix material to the high-strength reinforcing components through the introduction of whiskers with Young's moduli,generating compressive stresses in the matrix by introducing whiskerswith higher thermal expansion coefficients,impeding crack propagation through the whiskers, diverting the cracks along the whisker-matrix interface,and inducing microcracking by differerces in the mechanical and thermal properties of the whiskers and the matrix. However,the bonding forces between the whiskers and matrix should be kept low enough to ensure that dynamic stress will only pull the whiskers out of the matrix instead of tearing them apart.In whisker-reinforced ceramics,the mechanisms described may occur in superimposition.

Answer 1

最新的材料开发，目的是进一步通过纤维或晶须与陶瓷复合，增加这些陶瓷的强度。
晶须增强陶瓷复合材料具有准韧性强度的特性。
晶须增强原理是基于下列激活原理：通过引入具有杨氏模量的晶须，使压力从基体材料转移到高强度增强组份；通过引入具有较高的热膨胀系数的晶须在基体中产生压缩应力；通过晶须阻碍裂纹扩展，沿晶须-基体界面转移裂缝，；并通过晶须和基体材料间的机械和热力学行为的差异来诱导微裂纹。然而，晶须与基体之间应保持足够低的粘结力，以确保动态压力只会从基体中拉出晶须，而不是撕裂他们.在晶须增强陶瓷中，这些被描述的机制可能出现重叠。