SHS复合管Al-Fe-Ni合金复层组织特征及性能分析  

Organization Structure and Properties Analysis of Al-Fe-Ni Alloy Double Composite Layers of Composite Pipes Prepared by SHS

作　　者：崔健[1] 张浩[1] 周翠兰[1] 孟庆森[1] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024

出　　处：《材料热处理学报》2005年第6期87-90,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(50375105);山西省自然科学基金项目(20031051)

摘　　要：基于离心分离自蔓延技术,制备出了一种新型的形成AlFe0.23Ni0.77复合层的Fe-Al2O3金属复合管。研究分析了陶瓷层-金属间化合物复合层-金属基体接合的复层界面组织结构。结果表明,复合层与金属基体接合界面处的组织形态为细小的柱状晶交叉织构带。结晶初期,界面处液态金属依附于熔合区附近半熔化状态基体金属的晶粒表面,以细小的柱状晶的形态沿径向向钢管中心联生生长,形成牢固的冶金结合;层状过渡结构及树枝状交叉织构的特征组织,提高了陶瓷内衬结合强度,使复合管内衬层具有良好的力学性能。Centrifugal separation self-propagating high-temperature synthesis (SHS) is applied to prepare a new type of Fe-Al2O3 ceramic-lined composite pipe with AlFe0.23Ni0.77 composite layers. The microstructure among ceramic and intermetallic compound composite layers and base metal has been studied. The results indicated that the microstructure of the composite layers and base metal is structure of fine columnar crystal with dentrite crosses microstructure. At the beginning of crystallization, on the base of surface of semimelted crystal of base metal, the crystal produced in melted metal grew up as the form of fine columnar crystal towards the centre of pipe to get a strong metallurgy bonding; the formation of laminar and dentrite cross microstructure increased the bonding strength of ceramic-lined and base metal and improved mechanical properties of the composite pipe greatly.

关 键 词：SHS 金属间化合物 界面 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]