Residual microstructure associated with impact craters in TiB2/2024Al composite

Q Guo; D L Sun; L T Jiang; X L Han; G Q Chen; G H Wu

doi:10.1016/j.micron.2011.09.011

Residual microstructure associated with impact craters in TiB2/2024Al composite

Micron. 2012 Feb;43(2-3):344-8. doi: 10.1016/j.micron.2011.09.011. Epub 2011 Sep 29.

Authors

Q Guo¹, D L Sun, L T Jiang, X L Han, G Q Chen, G H Wu

Affiliation

¹ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.

PMID: 22019497
DOI: 10.1016/j.micron.2011.09.011

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't