SHS复合管FeNi合金过渡层接合界面结构及力学性能  

Interface structure and mechanical properties of FeNi alloy transition layer 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,山西太原030024

出　　处：《功能材料》2005年第9期1444-1446,共3页Journal of Functional Materials

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

摘　　要：采用离心分离自蔓延技术,制备出了一种新型的具有FeNi合金过渡层的Fe-Cr-Ni-Al2O3金属间化合物梯度复合管。研究分析了合金过渡层与金属基体接合界面组织结构。结果表明,梯度过渡层的组织形态为细小的柱状晶-胞状树枝晶-树枝状晶。结晶初期,界面处液态金属依附于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;梯度结构及树枝状交叉织构,提高了陶瓷内衬与基体的结合强度,使复合管内衬层具有良好的力学性能。Centrifugall separation self-propagating high-temperature synthesis（SHS） is apphed to prepare a new type of Fe-Cr-Ni-Al2O3 intermetallic compound ceramic-lined composite pipe with FeNi alloy transition layer. The microstructure between alloy transition layer and base metal has been studied. The results indicated that the microstructure of the transition layer is a structure of fine columnar crystal-cystiform dentrite-dentrite. 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 gradient layer and dentrite cross microstructure increased the bonding strength of between ceramic-lined and base metal and improved mechanical properties of the composite pipe greatly.

关 键 词：SHS 过渡层 FeNi 界面 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]