(哈尔滨工业大学金属精密热加工国防科技重点实验室, 哈尔滨 150001
*东南大学分析测试中心，南京 210096)
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[0(-3)32]TiB2∥[110]α(Al)，(01(-1)1TiB2∥(002)α(Al)， 而在沉积态时其位向关系为[0001]TiB2∥[111]α(Al)， (11(-2)0)TiB2∥(2(-2)0)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。
关键字: 喷射沉积 自生复合材料 界面结构 性能
（National Defense S and T Key Lab of Metal Precision Hot Working,
Harbin Institute of Technology, Harbin 150001, P. R. China
* Analysis and Testing Center, Southeast University, Nanjing 210096, P. R. China）
Abstract:TEM was used to analyze the interface structure of Al-5.5Cu/TiB2(20%) in-situ composites produced by cast and spray deposition, respectively. Some relationships between TiB2 and α(Al) were found. They are ［[0(-3)32]TiB2∥[110]α(Al), (01(-1)1TiB2∥(002)α(Al)(as-cast), [0001]TiB2∥[111]α(Al), (11(-2)0)TiB2∥(2(-2)0)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 50MPa 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.
Key words: spray deposition; in-situ composites; interface structure; property
