运用ＴＥＭ 观察了铸态、喷射沉积态Ａｌ５ ．５Ｃｕ／ＴｉＢ２ 复合材料中ＴｉＢ２ 与基体的界面结构，发现在铸态时ＴｉＢ２ 与α（Ａｌ） 之间存在的位向关系为［０３３２］ ＴｉＢ２ ∥［１１０］ α（Ａｌ） ，（０１１１）ＴｉＢ２ ∥（００２） α（Ａｌ） ， 而在沉积态时其位向关系为［０００１］ ＴｉＢ２ ∥［１１１］ α（Ａｌ） ，（１１２０）ＴｉＢ２ ∥（２２０）α（Ａｌ） 。力学性能测试结果表明： 喷射沉积后的Ａｌ５ ．５Ｃｕ／ＴｉＢ２ 自生复合材料的抗拉强度比铸态提高约５０ ＭＰａ ， 延伸率则提高５００ ％ 左右，耐磨性能也有较大提高 TEM observation of the as-cast, spray deposited Al  5. The interfacial structure between TiB2 and matrix in 5Cu / TiB2 composites shows that the orientation relationship between TiB2 and α (Al) is as follows: TiB2 ∥ [110] α (Al), (0111) TiB2 ∥ (002) α (Al), while in the as-deposited state the orientation is [0001] TiB2 ∥ [111] α (Al), (1120) TiB2 ∥ (220) α (Al). Mechanical properties test results show that: spray deposited Al  5. The tensile strength of 5Cu / TiB2 composites increases by about 50 MPa as compared with that of as-cast, the elongation increases about 500% and the wear resistance also increases greatly