Electron Correlation Microscopy Measurements of Metallic Glass Surface Dynamics
نویسندگان
چکیده
منابع مشابه
Surface Dynamics Measurements of Silica Glass
We present helium atom scattering experiments from the vitreous silica surface. Time-of-flight data of scattered He-atoms have been recorded at varying temperature and as a function of parallel momentum transfer. A dominant elastic peak and two broad features at ≈ 4 meV, one each on the phonon annihilation and creation side, are observed in all spectra. The thermal measurements between 127.0 an...
متن کاملComposition-dependent metallic glass alloys correlate atomic mobility with collective glass surface dynamics.
Glassy metallic alloys are richly tunable model systems for surface glassy dynamics. Here we study the correlation between atomic mobility, and the hopping rate of surface regions (clusters) that rearrange collectively on a minute to hour time scale. Increasing the proportion of low-mobility copper atoms in La-Ni-Al-Cu alloys reduces the cluster hopping rate, thus establishing a microscopic con...
متن کاملIn situ transmission electron microscopy studies of shear bands in a bulk metallic glass based composite
In situ straining transmission electron microscopy (TEM) experiments were performed to study the propagation of the shear bands in the Zr56.3Ti13.8Cu6.9Ni5.6Nb5.0Be12.5 bulk metallic glass based composite. Contrast in TEM images produced by shear bands in metallic glass and quantitative parameters of the shear bands were analyzed. It was determined that, at a large amount of shear in the glass,...
متن کامل4D scanning ultrafast electron microscopy: visualization of materials surface dynamics.
The continuous electron beam of conventional scanning electron microscopes (SEM) limits the temporal resolution required for the study of ultrafast dynamics of materials surfaces. Here, we report the development of scanning ultrafast electron microscopy (S-UEM) as a time-resolved method with resolutions in both space and time. The approach is demonstrated in the investigation of the dynamics of...
متن کاملSurface Electron Microscopy of Ga Droplet Dynamics on GaAs (001)
We describe the design and application of a surface electron microscope which has been constructed to study the in situ growth dynamics occurring on III-V semiconductor surfaces during molecular beam epitaxy. Mirror electron microscopy and photo-emission electron microscopy (PEEM) are used to ellucidate the physics of Langmuir (free) evaporation of GaAs. Of particular interest is the formation ...
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: Microscopy and Microanalysis
سال: 2020
ISSN: 1431-9276,1435-8115
DOI: 10.1017/s1431927620017080