Specific features of sample preparation from amorphous aluminum alloys for transmission electron microscopy

Волков, П. А.; Todorova, E. V.; Bakhteeva, N. D.; Иванова, А. Г.; Васильев, А. Л.

doi:10.1134/s1063774511030321

Cited by 6 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5] In general, top down approaches such as Ion milling, slicing by using focused ion beam and electrochemical polishing methods are used to reduce the thickness of the sample to prepare electron beam transparent samples. [2,[6][7][8] On the other hand, bottom up approaches that using direct deposition of thin layers on TEM-Window [9] and also on lacey/holy carbon grids were reported scarcely. Several non-conventional methods were adopted for different materials to be prepared as in-situ TEM specimens.…”

Section: Background Of the Workmentioning

confidence: 99%

“…Electropolishing method has been proposed for TEM sample preparation of metallic samples, especially for the study of amorphous structures by TEM. [8,14] However, the preferential milling involved in the electro polishing technique has been reported as detrimental for obtaining electron transparent sample. [15] Focused ion beam (FIB) is used with several pre-and post-steps to slice an ultrathin electron beam transparent sample from bulk material to be placed on TEM-Window.…”

Section: Background Of the Workmentioning

confidence: 99%

See 1 more Smart Citation

Double shadow masking sample preparation method for in‐situ TEM characterization

et al. 2020

View full text Add to dashboard Cite

A novel double mechanical masking-based sample preparation method is introduced for in-situ transmission electron microscopy (TEM) characterizations. In the current study amorphous vanadium pentoxide thin film deposition is carried out by using the developed double mask on a transparent window of TEM chip on precisely selected spots by a reactive sputtering technique. The prepared sample is less damaged since it is not subjected to ion beam exposure. And the probability of achieving a viable TEM sample is also enhanced compared to classical preparation methods. In-situ temperature-based electron diffraction pattern sequences are recorded for amorphous vanadium pentoxide in the temperature region of 25 to 500˚C. This allowed observing the crystallization temperature at ∼416˚C. The pre-and post-heat-treated microstructure and electron diffraction pattern of the vanadium pentoxide thin film showed the formation of a mixed crystalline and amorphous film. Thus, a most reliable, reusable and cost effective TEM sample preparation method was demonstrated. K E Y W O R D S amorphous crystalline behavior, double masking techniques, electron diffractions, in-situ transmission electron microscopy, vanadium pentoxide (V 2 O 5) This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Section: Background Of the Workmentioning

confidence: 99%

Section: Background Of the Workmentioning

confidence: 99%

Double shadow masking sample preparation method for in‐situ TEM characterization

et al. 2020

View full text Add to dashboard Cite

show abstract

“…can lead to significant structural changes. Al85Ni7Fe4La4 alloy amorphous ribbons are treated according to the following scheme: 1) annealing was conducted in the temperature range from 150 to 400ºC with the 50 ºC interval and 15 and 30 min exposure at each temperature with further cooling at the air; 2) severe plastic deformation was conducted at the ambient temperature in the Bridgman chamber at 8 GPa of hydrostatical pressure and at the rotation angle of movable anvil φ=360°×n (where n=1, 3, 6); 3) irradiation with carbon 12 …”

Section: Materials and Techniquesmentioning

confidence: 99%

“…Utilization of reduced accelerating voltage at samples preparation allows to avoid their substantial heating which may result in structural and constitutional change in alloys not associated with the processes under consideration. Research on ionic thinning (by Ar + ions) influence in wide range of parameters on phase transformation in amorphous alloys [12] was conducted earlier by the authors to determine optimum polishing regime.…”

Section: +3mentioning

confidence: 99%

Formation of composite structure of amorphous alloy after treatment of different types

Bakhteeva

Todorova

2018

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. The dependence of structure and microhardness of aluminium amorphous alloy were investigated and determined on samples after deformation, heat treatment and irradiation with fast carbon ions. IntroductionAluminum alloys are widely utilized as light, high-strength, temperature-resistant and corrosionresistant materials for aviation and aerospace equipment. Aluminum doping with transition and rareearth metals allows to receive amorphous structure during highspeed quenching from liquid state. Amorphous structure is an intermediate stage for amorphous-nanocrystalline composites preparation. Different methods of such structures preparation are known: heat treatment, severe plastic deformation (SPD), pulsed photonic irradiation, laser irradiation, radiation exposure. Ample quantity of scientific work is devoted to amorphous nanocrystalline structures preparation methods consideration. In such a way high deformation rates in event of severe plastic deformation [1-5] provide fine grained structure in alloys including nanoscale multiphase structure with increased strength performance. Scientific work results issued over the last years give an evidence of intense interest both to the new aluminum alloys development and to the formation behavior research of submicro-and nanocrystalline structures in the aluminum-based alloys doped with transition and rare-earth metals [3][4][5][6][7][8][9][10][11]. Amorphous alloys irradiation by high-energy ions is reviewed as one of the nanocrystalline composites preparation methods. Information presented in scientific literature about irradiation influence on amorphous alloys structures is limited and commonly contradictory, irradiation parameters vary in types of particles, energies and fluence.Amorphous alloys structure modification is considered now as a method of simultaneous mechanical properties (such as strength and ductility) enhancement. As aluminum alloys doped with transition metals are embrittled due to bulk large-sized intermetallic compounds allocation, best available compositions pulverization technology development is an actual task for research studies.

show abstract

Local chemical order in Al92Ce8 metallic glass: The role of 4f-electrons

Упоров¹,

Zubavichus²,

Yaroslavtsev³

et al. 2014

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

Specific features of sample preparation from amorphous aluminum alloys for transmission electron microscopy

Cited by 6 publications

References 12 publications

Double shadow masking sample preparation method for in‐situ TEM characterization

Double shadow masking sample preparation method for in‐situ TEM characterization

Formation of composite structure of amorphous alloy after treatment of different types

Local chemical order in Al92Ce8 metallic glass: The role of 4f-electrons

Contact Info

Product

Resources

About