欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用直流磁控溅射方法制备了不同调制比的Ni／Al纳米多层膜，利用X射线衍射技术和纳米压人连续刚度法分析了薄膜微结构及塑性变形的尺度依赖性．实验结果表明，尽管调制比有所不同，多层膜的硬度与“软”相的微结构特征参量随调制波长减小具有相似变化规律，说明多层膜的变形机制对“软”相的微结构约束存在敏感性．随着薄膜特征尺度的减小，为统一多层膜中晶界和膜界两种强化机制，提出一个与“软”相相关的表征参量r（r=Lsub/d，Lsub表示亚层厚，d表示晶粒尺寸），这使得薄膜变形在整个尺度范围内均符合Hall-Petch关系．
英文摘要：
Scale dependent microstructures and plastic deformation in Ni/A1 nanomultilayers with different modulated ratio has been investigated as a function of bilayer thickness by X-ray diffraction and nanoindentation. Experimental results show that the hardness and the related microstructural parameter in the softer sublayer exhibited the similar variation tendency, which indicated the sensitivity of plastic behaviom on the microstructural constraints in softer sublayer. Further investigation showed that in the nanometer regime, by adopting a new parameter r in softer sublayer （ r = Lsub/d, where Lsub is the sublayer thickness and d is the grain size）, the competing grain-boundary and interface-boundary strengthening mechanisms could be unified. Moreover, within the overall scale, the deformation of nanomuhilayers could follow the Hall-Petch relation with decreasing characteristic length scales.
同期刊论文项目
同项目期刊论文
Degradation failure features of chromium-plated gun barrels with a laser-discrete-quenched substrate
Effect of a laser pre-quenched steel substrate surface on the crack driving force in a coating-steel
Non-destructive impedance spectroscopy evaluation of the bond coat oxidation in thermal barrier coat
An experimental investigation on thermo-mechanical buckling delamination failure characteristic of a
Evolution of deformation-induced texture and surface microstructure of nickel coating under deep cup
Influence of vacuum heat treatment on structure and micro-hardness of electroless Ni-P-SiC composite
On the cyclic bending behaviour of a hard coating on a ductile substrate with periodic surface harde
The effect of periodic segmentation cracks on the interfacial debonding: Study on interfacial stress
Characterization of a laser-discrete quenched steel substrate/chromium system by dissolving coatings
On the tensile behaviors of a hard chromium coating plated on a steel substrate with periodic subsur
A quantitative analysis of the effect of laser transformation hardening on crack driving force in st
Measurement of fracture toughness and interfacial shear strength of hard and brittle Cr coating on d
On the evaluation of the adhesion of electroplated Ni coatings upon steel substrate with extended mi
A universal expression for interfacial indentation toughness of a ceramic coating on metallic substr
An experimental investigation of the interface fracture characteristic in air plasma sprayed thermal
Effects of interfacial properties on the ductility of polymer-supported metal films for flexible ele
Anomalous electronic transport in metallic nanomultilayer at all length scales: Influence of grain b
期刊信息
位置：