Electron phase transition in TiNi?

Shabalovskaja, S.A.; Лотков, А. И.; Sasovskaja, I.I.; Narmonev, A.G.; Захаров, А. И.

doi:10.1016/0038-1098(79)90744-0

Cited by 14 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) Austenitic-martensitic transformation is responsible for a hysteresis effect which becomes more noticeable in the composite for high NiTi fraction. The abrupt change in the TEP upon transformation is related to changes in the density of states (DOS) near the Fermi level, with the DOS at the Fermi level being lower for the martensitic than for the austenitic state [31,34] due to lattice instabilities. Based on the strong transition presented in Fig.…”

Section: Thermoelectric Power Studymentioning

confidence: 99%

“…The transformation behaviour in pure systems is known to be sensitive not only to compositional variations [20][21][22][23][24][25][26], heat treatment [27,28] and applied stress [29], but also to transformation cycles [26,30,58]. So far, the NiTi transformation behaviour has been studied using different tools, such as electrical resistivity [22,31], differential scanning calorimetry (DSC) [27,28], internal friction measurements [22,23,30,32,33], magnetic susceptibility [34] and thermoelectric power [31]. The transformation behaviour of NiTi embedded in a precipitation hardenable aluminium alloy has not been investigated yet, as earlier work on such systems was aimed at tailoring the mechanical properties [7][8][9]11,12,35,36] and processing route [12,36].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the transformation behaviour of NiTi particulate reinforced AA2124 composites

Thorat

Risanti

Martín

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

a b s t r a c tThe transformation behaviour of AA2124 alloys reinforced with NiTi particulates of 10 vol pct and 20 vol pct has been studied by differential scanning calorimetry (DSC), thermoelectric power (TEP) and internal friction (IF). Addition of NiTi particulates increases the damping capacity as well as the precipitation kinetics of AA2124 composites with respect to the base AA2124. Heat treatments performed to change the matrix condition do not alter the transformation significantly, other than homogeneising the Al level in the particulates, which is present due to the preceding extrusion treatment. The presence of Al in NiTi stabilizes the R-phase transformation but the M s remains stable.

show abstract

Section: Thermoelectric Power Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the transformation behaviour of NiTi particulate reinforced AA2124 composites

Thorat

Risanti

Martín

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

show abstract

“…Additionally, NiTi exhibits the martensic transition from the austenic B2-phase (like CsCl-structure) to the monoclinic B19'-structure upon cooling, proceeded by the so-called premartensic phenomena with the martensic transformation temperature near room temperature (T M = 333 K) [5]. This compound being the basic industrial shape memory alloy (SMA) is under intensive study over the world [6][7][8][9][10][11][12][13][14]. Recent spectroscopic ellipsometry study of FeTi, CoTi, and NiTi alloys has revealed strong optical transitions and has explained the similarities and the differences among optical conductivity (OC) spectra and the measured results are much closer to those obtained from LAPW method [15].…”

Section: Introductionmentioning

confidence: 99%

Electronic study of FeTi, CoTi, and NiTi alloys: bulk, surfaces, and interfaces

Kellou¹,

Nabi²,

Tadjer³

et al. 2003

Physica Status Solidi (b)

View full text Add to dashboard Cite

The full-potential linearized augmented plane waves (FP-LAPW) method within the generalized gradient approximation (GGA) is applied to determine the electronic properties of the equiatomic alloys B2-MTi (M = Fe, Co, Ni). Detailed analysis is devoted to the NiTi austenic, premartensic, and martensic phases. The martensic transformation (MT) occurs from the austenic B2 (CsCl structure) to the monoclinic B19' phase upon cooling. Spin-polarized slab calculations are carried out to study the FeTi(001), CoTi(001), and NiTi(001) surfaces and the FeTi/CoTi, FeTi/NiTi, and CoTi/NiTi interfaces. The stability mechanism of the interface is related to the calculated ideal work of adhesion. The corresponding electronic structure and local magnetic moments of the surface, sub-surface, and central layers are also given.

show abstract

“…[135,136] The importance of electronic aspects of martensitic transformations in NiTi-based shape memory alloys has often been pointed out in the literature. Shabalovskaya et al [137,138] conducted early research on electronic aspects and proposed the formation of a CDW. [138] Zhao et al [139] discussed nesting of the Fermi surface in [110] direction.…”

Section: Niti-based Shape Memory Alloymentioning

confidence: 99%

A Unifying Perspective of Common Motifs That Occur across Disparate Classes of Materials Harboring Displacive Phase Transitions

Grünebohm

Hütten

Böhmer

et al. 2023

Advanced Energy Materials

View full text Add to dashboard Cite

Several classes of materials manifest displacive phase transitions, including shape memory alloys, many electronically correlated materials, superconductors, and ferroelectrics. Each of these classes of materials displays a wide range of fascinating properties and functionalities that are studied in disparate communities. However, these materials’ classes share similar electronic and phononic instabilities in conjunction with microstructural features. Specifically, the common motifs include twinned microstructures, anomalies in the transport behavior, softening of specific phonons, and frequently also (giant) Kohn anomalies, soft phonons, and/or nesting of the Fermi surface. These effects, phenomena, and their applications have until now been discussed in separate communities, which is a missed opportunity. In this perspective a unified framework is presented to understand these materials, by identifying similarities, defining a unified phenomenological description of displacive phase transitions and the associated order parameters, and introducing the main symmetry‐breaking mechanisms. This unified framework aims to bring together experimental and theoretical know‐how and methodologies across disciplines to enable unraveling hitherto missing important mechanistic understanding about the phase transitions in (magnetic) shape memory alloys, superconductors and correlated materials, and ferroelectrics. Connecting structural and electronic phenomena and microstructure to functional properties may offer so‐far unknown pathways to innovate applications based on these materials.

show abstract

Electron phase transition in TiNi?

Cited by 14 publications

References 4 publications

On the transformation behaviour of NiTi particulate reinforced AA2124 composites

On the transformation behaviour of NiTi particulate reinforced AA2124 composites

Electronic study of FeTi, CoTi, and NiTi alloys: bulk, surfaces, and interfaces

A Unifying Perspective of Common Motifs That Occur across Disparate Classes of Materials Harboring Displacive Phase Transitions

Contact Info

Product

Resources

About