A new metastable crystalline phase in the Cr–Zr system

Bodega, J.; Garcés, G.; Leardini, Fabrice; Ares, J.R.; Fernández, J.F.; Adeva, P.; Sánchez, Carlos

doi:10.1016/j.intermet.2009.12.002

Cited by 4 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the Fe-Nb system also an M 23 C 6 -type phase was reported [215], whereas impurity-stabilized Th 6 Fe 23 -type phases were observed in Fe-Zrbased alloys [216,217]. Moreover, a metastable facecentered cubic phase with a lattice parameter of a = 8.17 Å and unknown atomic structure incompatible with the previously mentioned structures was reported in Cr-36 at.% Zr alloy [218], which might also be an impurity phase. Note that this list is definitely incomplete since such impurity phases are often only mentioned in passing.…”

Section: Polytypismmentioning

confidence: 84%

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

2020

View full text Add to dashboard Cite

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.

show abstract

Section: Polytypismmentioning

confidence: 84%

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

2020

View full text Add to dashboard Cite

show abstract

“…For L1 0 phase, L1 2 phase and DO 22 phases, different equations between the first nearest neighbor interatomic potentials V ab 1 of each phase and long range order (LRO) parameters can be gained according to equation ( 6) [22], L1 0 phase:…”

Section: Theoretical Modelsmentioning

confidence: 99%

“…The precipitation transformation in precipitation process of Nickel-based alloys is regulated by atomic diffusions; therefore, a series of metastable or transitional phases could probably be formed in the early stage of precipitation process [1][2][3][4][5]. These metastable or transitional nonequilibrium phases called "pre-precipitation phase", of which the chemical composition is close to the matrix phase and the crystal structure is close to the stable phase, precipitate first when alloys quickly cool off from single-phase region to double-phase region [6].…”

Section: Introductionmentioning

confidence: 99%

Computer Simulation of the Early Stage of Precipitation of L1<sub>2</sub>-Ni<sub>3</sub>(Al,V) Using Microscopic Phase Field Method

Dong

Chen

2015

MSF

View full text Add to dashboard Cite

Based on the phase field theory, the long-range order (LRO) parameter related interatomic potentials equations were utilized to calculate the interatomic potentials of L10-Ni3(Al,V), L12-Ni3Al and L12-Ni3(Al,V) phases varying with temperature and concentrations. Using these potentials, the simulated microstructure evolution and the order parameter with the time of Ni75Al20V5 ternary alloy are simulated at temperature 1000K during the early stage of the precipitation process in this research. Results testify that the precipitation sequence during the early stage of Ni75Al20V5 alloy is the disordered phase →L10 pre-precipitation phase →L12 equilibrium phase. Firstly, the nonstoichiometric L10 pre-precipitation phase formed by congruent ordering precipitation mechanism; secondly, the nonstoichiometric L12 phase formed by transforming from L10 phase; thirdly, the stoichiometric equilibrium L12 phase formed by spinodal decomposition precipitation mechanism. It is discovered that the precipitation mechanism (congruent ordering+ spinodal decomposition) process was closely related to free energy and interatomic potentials: L10 pre-precipitation phase’s free energies are higher and interatomic potentials are smaller than those of L12 equilibrium phase.

show abstract

Laves phase precipitation in Ti-Zr-Fe-Cr alloys with high strength and large plasticity

et al. 2018

View full text Add to dashboard Cite

A new metastable crystalline phase in the Cr–Zr system

Cited by 4 publications

References 10 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

Computer Simulation of the Early Stage of Precipitation of L1<sub>2</sub>-Ni<sub>3</sub>(Al,V) Using Microscopic Phase Field Method

Laves phase precipitation in Ti-Zr-Fe-Cr alloys with high strength and large plasticity

Contact Info

Product

Resources

About