Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics

Zarinejad, Mehrdad; Wada, Kiyohide; Pahlevani, Farshid; Katal, Reza; Rimaz, Sajjad

doi:10.1016/j.jallcom.2021.159399

Cited by 5 publications

(5 citation statements)

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“…of the material, which are dependent on both composition and temperature, are the key parameters influencing the transformation temperatures. [27,36] Dependence of transformation temperatures of the matrix crystals of solid solutions in NiTi, [28][29][30][37][38][39][40] TiPd and TiPt, [41] TiAu, and TiIr [42] -based alloys and many other alloy systems [2,43] was shown to be influenced by the chemistry of the alloys and how the metallic bonding in them changes because of the chemical composition change. Hence, the correlation of mechanical properties of solid solutions with electron variables in several alloys/intermetallic systems was introduced.…”

Section: Doi: 101002/adem202200606mentioning

confidence: 99%

“…Hence, the correlation of mechanical properties of solid solutions with electron variables in several alloys/intermetallic systems was introduced. [29][30][31][37][38][39][40][41][42][43] Knowing that in ceramic materials, the localized valence electrons dominate the strengths of bonds and elastic properties, [44,45] it is of particular importance to study the electronic parameters of the ceramics.…”

Section: Doi: 101002/adem202200606mentioning

confidence: 99%

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Martensitic Transformation Temperatures of Ceramics

Zarineja¹,

White

Tong

et al. 2022

Adv Eng Mater

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The renewed interest in shape memory and toughened ceramics for small‐scale applications makes the relationship between the chemistry of the ceramics and martensitic transformation temperatures (forward and reverse temperatures M s and A s) of paramount importance. Dependence of transformation temperatures of the ceramics with shape memory effect and/or martensitic phase change on valence electron ratio (VER), number of valence electrons (e v), and average atomic number of the ceramics (Z) is investigated. Depending on chemical composition, the ceramics have average numbers of valence electrons (4.571 ≤ e v ≤ 5.667), Z = 13–29.333, and VER in the range of (0.17–0.44). A clear correlation of transformation temperatures to VER for most ceramics is found. M s and A s both decrease with increasing VER. Aliovalent doping alters e v and makes it influential in controlling the transformation temperatures. The influence of VER, e v, Z, and the suppressive effect of oversized solutes on M s is addressed.

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Section: Doi: 101002/adem202200606mentioning

confidence: 99%

Section: Doi: 101002/adem202200606mentioning

confidence: 99%

Martensitic Transformation Temperatures of Ceramics

Zarineja¹,

White

Tong

et al. 2022

Adv Eng Mater

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“…There has been growing interest in the Zr–C–Ir system in a number of fields such as electrocatalysis 1–4 as well as superconducting 5,6 and shape‐memory materials 7–9 . Due to its high melting point, low oxygen (1·10 −14 –1·10 −18 g/cm·s at 2200°C), and carbon permeability, as well as high hardness, iridium is also considered a promising barrier coating for structural carbon materials operating in extreme environments 10–13 .…”

Section: Introductionmentioning

confidence: 99%

“…There has been growing interest in the Zr-C-Ir system in a number of fields such as electrocatalysis [1][2][3][4] as well as superconducting 5,6 and shape-memory materials. [7][8][9] Due to its high melting point, low oxygen (1⋅10 −14 -1⋅10 −18 g/cm⋅s at 2200 • C), and carbon permeability, as well as high hardness, iridium is also considered a promising barrier coating for structural carbon materials operating in extreme environments. [10][11][12][13] However, there exists a problem with applying the iridium barrier coating onto a carbon-based structural material, which is related to the poor wettability of carbon by iridium.…”

Section: Introductionmentioning

confidence: 99%

High‐temperature solid‐state reaction between zirconium carbide and iridium: New insights into the phase formation

Nikiforov,

Danilovsky,

Lozanov

et al. 2024

J Am Ceram Soc.

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The reaction between ZrC and iridium powders was studied in the temperature range of 1000–1600°C. The reaction was stated to start at a temperature as low as 1000°C. The only high‐melting intermetallic phase, ZrIr3, was obtained as a substitutional solid solution ZrIr3±δ. A new analytical approach to relating the composition to the lattice parameter of cubic binary substitutional ZrIr3±δ solid solutions was proposed. This approach is based on comparing the distribution by elemental composition and by lattice parameter in a range of ZrIr3±δ solid solutions. This made it possible to determine the lattice parameter of a stoichiometric ZrIr3 phase, a0 = 3.971(5) Å.

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“…For the binary Ti–Au SMAs, most of the researches focused on the near–Ti 50 Au 50 alloys for the applications of high temperature SMAs [ 26 , 27 , 28 ]. In the case of the near–eutectoid Ti–Au alloy (i.e., Au concentration at approximately 4.2 at.% (or 15.3 wt.% Au)), the literature is relatively limited.…”

Section: Introductionmentioning

confidence: 99%

Investigations of Effects of Intermetallic Compound on the Mechanical Properties and Shape Memory Effect of Ti–Au–Ta Biomaterials

et al. 2021

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Owing to the world population aging, biomedical materials, such as shape memory alloys (SMAs) have attracted much attention. The biocompatible Ti–Au–Ta SMAs, which also possess high X–ray contrast for the applications like guidewire utilized in surgery, were studied in this work. The alloys were successfully prepared by physical metallurgy techniques and the phase constituents, microstructures, chemical compositions, shape memory effect (SME), and superelasticity (SE) of the Ti–Au–Ta SMAs were also examined. The functionalities, such as SME, were revealed by the introduction of the third element Ta; in addition, obvious improvements of the alloy performances of the ternary Ti–Au–Ta alloys were confirmed while compared with that of the binary Ti–Au alloy. The Ti3Au intermetallic compound was both found crystallographically and metallographically in the Ti–4 at.% Au–30 at.% Ta alloy. The strength of the alloy was promoted by the precipitates of the Ti3Au intermetallic compound. The effects of the Ti3Au precipitates on the mechanical properties, SME, and SE were also investigated in this work. Slight shape recovery was found in the Ti–4 at.% Au–20 at.% Ta alloy during unloading of an externally applied stress.

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Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics

Cited by 5 publications

References 57 publications

Martensitic Transformation Temperatures of Ceramics

Martensitic Transformation Temperatures of Ceramics

High‐temperature solid‐state reaction between zirconium carbide and iridium: New insights into the phase formation

Investigations of Effects of Intermetallic Compound on the Mechanical Properties and Shape Memory Effect of Ti–Au–Ta Biomaterials

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