Indentation size effect in exceptionally hard AlCu thin films
نویسندگان
چکیده
• Exceptionally hard Al-Cu thin films. Close correlation between the microstructure and occurrence of size effect. Unexpected absence effect phenomenon in fine-grained materials. Size strongly precipitated Dual DC magnetron sputtered AlCu films representing whole composition range were investigated by depth-sensing indentation (DSI), transmission electron microscopy (TEM) atomic force (AFM). Experimental results show exceptionally high hardness ? 16 GPa middle concentration 40-70 at% Cu. Indentation tests also revealed phenomena related to size-effect. At Al or Cu contents below 20 at%, well-known was not observed, which can be interpreted grain boundary sliding deformation mechanism In composition, clearly observed even against fine structure. This is a consequence highly these films, leads processes taking place manner more characteristic amorphous
منابع مشابه
Indentation measurements on thin films
Thin films have an important part to play in modern technology. It is difficult to characterize the mechanical properties of thin films because the films cannot usually be investigated separately from the substrate. One of the few methods that can be used for such investigations consists in making an indentation in the film by applying an extremely small and accurately controlled force while at...
متن کاملHard Magnetic Thin Films
Hard magnetic films have a broad application area ranging from magnetic recording media to microelectromagnetic devices. A challenge for recording media is the 60% annual increase in areal density, which requires ever smaller magnetic dots. However, for a given magnetic anisotropy the reduction of dot size is limited, since below a critical magnetic volume the magnetisation becomes thermally un...
متن کاملOn size effect of cleavage cracking in polycrystalline thin films
A crack trapping model is developed for the fracture resistance of high-angle grain boundaries in free-standing brittle thin films, based on which a new size effect is predicted. In addition to the crystallographic misorientations, the grain boundary toughness is also dependent on the film thickness, primarily due to the geometrically necessary crack front branching. 2007 Elsevier Ltd. All righ...
متن کاملNano-indentation of Copper Thin Films on Silicon Substrates
Indentation methods are finding increasing use in the study of mechanical properties of bulk and thin-film materials over a wide range of size scales (e.g., [1,2]). With the increasing sophistication of instrumented, depth-sensing indentation equipment and of computational methods to model the deformation of materials subjected to indentation, there is growing interest in studying the elastopla...
متن کاملNew methods of analyzing indentation experiments on very thin films
Indentation experiments on thin films are analyzed by using a rigorous solution to model elastic substrate effects. Two cases are discussed: elastic indentations where film and substrate are anisotropic and elastoplastic indentations where significant material pileup occurs. We demonstrate that the elastic modulus of a thin film can be accurately measured in both cases, even if there is signifi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Materials Letters
سال: 2023
ISSN: ['1873-4979', '0167-577X']
DOI: https://doi.org/10.1016/j.matlet.2022.133409