(哈爾濱工業(yè)大學(xué)金屬精密熱加工國(guó)防科技重點(diǎn)實(shí)驗(yàn)室, 哈爾濱 150001
*東南大學(xué)分析測(cè)試中心，南京 210096)
摘 要: 運(yùn)用TEM觀察了鑄態(tài)、噴射沉積態(tài)Al-5.5Cu/TiB2復(fù)合材料中TiB2與基體的界面結(jié)構(gòu)，發(fā)現(xiàn)在鑄態(tài)時(shí)TiB2與α(Al)之間存在的位向關(guān)系為[0(-3)32]TiB2∥[110]α(Al)，(01(-1)1TiB2∥(002)α(Al)， 而在沉積態(tài)時(shí)其位向關(guān)系為[0001]TiB2∥[111]α(Al)， (11(-2)0)TiB2∥(2(-2)0)α(Al)。力學(xué)性能測(cè)試結(jié)果表明：噴射沉積后的Al-5.5Cu/TiB2自生復(fù)合材料的抗拉強(qiáng)度比鑄態(tài)提高約50 MPa，延伸率則提高500%左右，耐磨性能也有較大提高。
關(guān)鍵字: 噴射沉積 自生復(fù)合材料 界面結(jié)構(gòu) 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
