Microstructure and nanoindentation hardness of Ag/Fe multilayers  

作　　者：朱晓莹 刘雪敬 曾飞 潘峰 

机构地区：[1]Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University [2]National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering

出　　处：《中国有色金属学会会刊：英文版》2010年第1期110-114,共5页Transactions of Nonferrous Metals Society of China

基　　金：Projects(50871060, 50772055) supported by the National Natural Science Foundation of China;Project(2007AA03Z426) supported by High-tech Research and Development Program of China

摘　　要：Ag/Fe multilayers with well compositional modulation periodicity of 4-60 nm were prepared at room temperature by evaporation deposition using an ultra high vacuum (UHV) chamber. Their microstructure and hardness were investigated using XRD, TEM and nanoindentation. The fcc/bcc type multilayers show a textured polycrystalline growth with Ag (111) and Fe (110) in Ag layers and Fe layers, respectively. The hardness increases with decreasing periodicity and approaches the maximum of 6.36 GPa at the periodicity of 4 nm. The peak hardness is 1.51 times mixture value. The experimental results are well explained by the dislocation-image force-based model developed by Lehoczky.Ag/Fe multilayers with well compositional modulation periodicity of 4-60 nm were prepared at room temperature by evaporation deposition using an ultra high vacuum （UHV） chamber. Their microstructure and hardness were investigated using XRD, TEM and nanoindentation. The fcc/bcc type multilayers show a textured polycrystalline growth with Ag （111） and Fe （110） in Ag layers and Fe layers, respectively. The hardness increases with decreasing periodicity and approaches the maximum of 6.36 GPa at the periodicity of 4 nm. The peak hardness is 1.51 times mixture value. The experimental results are well explained by the dislocation-image force-based model developed by Lehoczky.

关 键 词：纳米压痕硬度 多层膜 微结构 铁 超高真空 调制频率 纳米结构 微观结构 

分 类 号：TB303[一般工业技术—材料科学与工程]