School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Micron. 2012 Feb;43(2-3):344-8. doi: 10.1016/j.micron.2011.09.011. Epub 2011 Sep 29.
Residual microstructures associated with hypervelocity impact craters in 55 vol.% TiB(2)/2024Al composite were investigated by transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). TiB(2)-Al interface, TiB(2) particles and Al matrix before and after hypervelocity impact were compared to discuss the effect of hypervelocity impact. A new Al(x)O(1-x) phase with the fcc structure and the crystal parameter of 0.69 nm was formed at TiB(2)-Al interface. Stacking fault with width of 10-20 nm was formed along the (001) plane of TiB(2) particle. Formation of nanograins (≈ 100 nm) was observed within Al matrix, moreover, lamellar S' phase was transformed into lenticular or spherical S phase after hypervelocity impact.
利用透射电子显微镜（TEM）和高分辨率透射电子显微镜（HRTEM）研究了 55vol.%TiB(2)/2024Al 复合材料中与高速冲击坑相关的残余微观结构。对比了高速冲击前后的 TiB(2)-Al 界面、TiB(2)颗粒和 Al 基体，以讨论高速冲击的影响。在 TiB(2)-Al 界面处形成了具有 fcc 结构和 0.69nm 晶体参数的新型 Al(x)O(1-x)相。在 TiB(2)颗粒的（001）面上形成了宽度为 10-20nm 的堆垛层错。在 Al 基体中观察到纳米晶粒（≈100nm）的形成，此外，高速冲击后层片状 S'相转变为板状或球形 S 相。
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