【摘要】 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更多还原

【Abstract】 TEM was used to analyze the interface structure of Al 5.5Cu/TiB 2(20%) in situ composites produced by cast and spray deposition, respectively. Some relationships between TiB 2 and α (Al) were found. They are [0332] TiB 2 ∥[110] α (Al) , (0111) TiB 2 ∥(002) α (Al) (as cast), [0001] TiB 2 ∥[111] α (Al) , (1120) TiB 2 ∥(220) α (Al) (as deposition). It is proved based on mechanical properties test that the tensile strength of the materials produced by spray deposition is increased 50 MPa than that of the composites fabricated by casting, and the elongation of the materials is elevated about 5 times, meanwhile the wear resistance of the material is elevated a lot.更多还原