Structure and defects evolution at temperature and activation treatments of the TiCr2 intermetallic compound of Laves phase C36-type

Murashkina, T.L.; Сыртанов, М. С.; Laptev, Roman; Stepanova, E. N.; Лидер, А. М.

doi:10.1016/j.ijhydene.2019.02.154

Cited by 10 publications

(8 citation statements)

References 61 publications

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“…phases are based on Zr and/or Ti as the large A metal, while the B lattice sites are occupied by one or-in most cases-more of the 3d metals Co, Cr, Fe, Mn, Ni, V. The compositions of both the alloys with mainly Zr on the A sites (e.g., [434][435][436][437][438][439][440][441]) and with mainly Ti on the A sites (e.g., [442][443][444][445][446][447][448][449]) became more and more complex. Many of the currently discussed alloys for applications contain six to nine components, where in some cases small amounts of main group elements such as Al or Sn (e.g., [421,450,451]), or lanthanides [452] were added.…”

Section: Functional Applications 41 Hydrogen Storage Materialsmentioning

confidence: 99%

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

2020

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Laves phases with their comparably simple crystal structure are very common intermetallic phases and can be formed from element combinations all over the periodic table resulting in a huge number of known examples. Even though this type of phases is known for almost 100 years, and although a lot of information on stability, structure, and properties has accumulated especially during the last about 20 years, systematic evaluation and rationalization of this information in particular as a function of the involved elements is often lacking. It is one of the two main goals of this review to summarize the knowledge for some selected respective topics with a certain focus on non-stoichiometric, i.e., non-ideal Laves phases. The second, central goal of the review is to give a systematic overview about the role of Laves phases in all kinds of materials for functional and structural applications. There is a surprisingly broad range of successful utilization of Laves phases in functional applications comprising Laves phases as hydrogen storage material (Hydraloy), as magneto-mechanical sensors and actuators (Terfenol), or for wear- and corrosion-resistant coatings in corrosive atmospheres and at high temperatures (Tribaloy), to name but a few. Regarding structural applications, there is a renewed interest in using Laves phases for creep-strengthening of high-temperature steels and new respective alloy design concepts were developed and successfully tested. Apart from steels, Laves phases also occur in various other kinds of structural materials sometimes effectively improving properties, but often also acting in a detrimental way.

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Section: Functional Applications 41 Hydrogen Storage Materialsmentioning

confidence: 99%

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

2020

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“…Regardless of the polytype, the formation of Laves-phase is promoted for an atomic-radius ratio r r A B ( ) within the range of 1.05 to 1.68 (r A and r B are the atomic radii of atoms A and B, respectively). Thus, the stabilization of Laves-phase depends on the ability of different atoms to shrink or expand [18,19] to form a closed-packed microstructure (stacking factor equal to 0.78). Besides, the abundance of Laves structures among metallic compounds has been attributed to principles governing the geometric arrangement of atoms on ordered lattice sites [18].…”

Section: Crystallographic Descriptionmentioning

confidence: 99%

“…Finally, when nucleation and growth are completed, the volumetric fraction of the precipitate becomes constant, followed by the coarsening of particles defined by the Ostwald-ripening equation (equation (19)).…”

Section: Precipitation Kineticsmentioning

confidence: 99%

Laves phase formation in Fe-based alloys from strengthening particle to self-healing agent: a review

Wackerling,

Rojas,

Oñate

et al. 2023

Mater. Res. Express

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In this study, were extensively reviewed the hardening and self-healing properties of Laves-phase in Fe-based alloys. First, the microstructural features of different polytypes of the Laves-phase, focusing on the thermodynamics and kinetics of formation in ferritic and martensitic steels were revised. C14 was identified as the dominant polytype in steels, providing strengthening by precipitation, anchoring of dislocation, and interphase boundaries, thereby increasing the creep resistance. Although the Laves phase is widely known as a reinforcement particle (or even a detrimental phase in some systems) in martensitic/ferritic and ferritic steels, recent findings have uncovered a promising property. Particles with self-healing characteristics provide creep resistance by delaying creep cavities formation. In this regard, different elements such as tungsten and molybdenum are known to provide this feature to binary and tertiary ferrous alloys due to their ability to diffuse into the creep cavities and form Laves-phase Fe(Mo,W)2. To date, self-healing by precipitation has only been reported in commercial stainless steel AISI 312, 347, and 304 modified with boron, nevertheless with a little contribution to creep rupture life. Although, commercial computational tools with thermodynamic and kinetic databases are available for researchers, to tackle the self-healing process with exactitude, genetic algorithms arise as a new tool for computational design. The two properties of Laves phase reported in the literature, precipitation hardening and self-healing agent, is a mix that can bring out a new research field. Therefore, it is not unreasonable to think of tailor-made high chromium creep-resistant steels reinforced by Laves-phase coupled with self-healing properties. However, owing to the characteristic of Laves-phase seems to be a complex challenge, mainly due to the crystallographic features of this phase in comparison with the host matrix, available computational tools, and databases.

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“…The study of hydrogen storage materials is directly related to the application of electric vehicles, and also has an important impact in submarines, spacecraft and other applications. Various hydrogen storage materials have been developed worldwide [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], and many researchers have focused their research on the study of magnesium-based hydrogen storage materials. Much attention is paid to the study of magnesium-based materials due to the fact that magnesium has many important properties.…”

Section: Introductionmentioning

confidence: 99%

Using Ball Milling for Modification of the Hydrogenation/Dehydrogenation Process in Magnesium-Based Hydrogen Storage Materials: An Overview

Lyu

Лидер

Kudiiarov

2019

Metals

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Magnesium-based hydrogen storage materials are considered to be one of the most promising solid-state hydrogen storage materials due to their large hydrogen storage capacity and low cost. However, slow hydrogen absorption/desorption rate and excessive hydrogen absorption/desorption temperature limit the application of magnesium-based hydrogen storage materials. The present paper reviews recent progress in improving the hydrogen storage properties by element substitution and additives. Ball milling is the promising technology for preparing magnesium-based hydrogen storage materials. The research and development of approaches for modifying magnesium-based hydrogen storage materials prepared by ball milling is systematically expounded. It is concluded that ball milling can significantly improve the kinetic and electrochemical properties of magnesium-based hydrogen storage materials and increase the hydrogen storage capacity. In the future, the research of magnesium-based hydrogen storage materials should be developed in terms of hydrogen storage mechanism, computer design of materials and development of a more optimized catalytic system.

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Structure and defects evolution at temperature and activation treatments of the TiCr2 intermetallic compound of Laves phase C36-type

Cited by 10 publications

References 61 publications

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

Laves phase formation in Fe-based alloys from strengthening particle to self-healing agent: a review

Using Ball Milling for Modification of the Hydrogenation/Dehydrogenation Process in Magnesium-Based Hydrogen Storage Materials: An Overview

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