Effect of titanium on the structure and mechanical properties of Cu-Al-Ti alloys

Morgiel, J.; Salawa, J.

doi:10.1007/bf02403107

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…Heusler phase is a cubic ordered intermetallic alloy of L2 1 structure. 2 We reconfirm this result using Java EMS software (P. Stadelmann, EPFL, Lausanne, Switzerland) to calculate the SADP in Fig. 9(b), and we find consistency with the L2 1 ternary Heusler phase as can be seen by the {100} type order reflection inside the usual fcc-peaks.…”

Section: B Ex Situ Heatingsupporting

confidence: 72%

“…This can be concluded by the shift becoming more significant across the nanopillars region, because of carbon growing to higher C/alloy ratios in thin areas. It is instructive to calculate the free-electron model plasmon resonance for the alloy phase, based on unit cell size and atom numbers and assuming the Cu valence as n ¼ 2 in analogy to CuAl 2 14,19,20 using the formula (e.g., Ref. 21):…”

Section: A In Situ Heatingmentioning

confidence: 99%

“…The metal systems Cu, Al, Ni, Ti, and Mg are common systems that have been studied for such applications. [1][2][3][4][5][6][7] Their binary, and to a lesser extent ternary alloy phase diagrams, have been established over many decades using traditional "three-dimensional" (3D) bulk metallurgy. More recently, the study of thin layered coatings, which could be referred to as "two-dimensional" (2D) materials systems with one nanoscale dimension, have attracted attention.…”

Section: Introductionmentioning

confidence: 99%

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In situ and ex situ transmission electron microscopy investigation of Cu–Al–Cu–Ti reactive metallic multilayer coatings

2010

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Metallic multilayers of Cu/Al/Ti composition were studied by transmission electron microscopy (TEM) and plasmon energy-loss mapping as prototypes of nanoscale reactive multilayer systems with exothermic alloy formation in oxygen-free conditions. The selection and arrangement of alloy phases by the system during ex situ and in situ heating experiments were found to depend not only on temperature but strongly on the initial volume ratios of metals, and to a lesser degree on the dimensionality of the reactive sample. Here, a two-dimensional sample was represented by ex situ heating of the full multilayer structure, a one-dimensional sample refers to in situ heating of thin cross-sectional TEM specimens, while a zero-dimensional sample (or metallic dot-array) was obtained after cutting thin pillars using focused ion beams. Lamellar self-organized alternation between Heusler phase and Cu 9 Al 4 was found.

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Section: B Ex Situ Heatingsupporting

confidence: 72%

Section: A In Situ Heatingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In situ and ex situ transmission electron microscopy investigation of Cu–Al–Cu–Ti reactive metallic multilayer coatings

2010

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“…A common reactive metallic multilayer coating is based on Cu, Al, and Ti. The ternary chemistry has previously been investigated by several researchers such as Campisano et al (1978), Dutkiewicz et al (1984), Gershinskii et al (1977), Jiang et al (1993), Rajan and Wallach (1980), Rayne et al (1980), and Vandenberg and Hamm (1982).…”

Section: Introductionmentioning

confidence: 99%

Reactive Multilayers Examined by HRTEM and Plasmon EELS Chemical Mapping

Yajid

Möbus

2009

Microsc Microanal

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We examine chemical mapping of reaction phases in a Cu-Al multilayer system using low-loss electron energy loss spectroscopy spectrum imaging and image spectroscopy techniques. The sensitivity of the plasmon peak position and shape to various crystal structures and phases is exploited using postprocessing of spectra into second derivative plasmon maps and line scans. Analytical transmission electron microscopy is complemented by studies of the orientation relationship of the multilayer system using high-resolution electron microscopy of interfaces and selected area diffraction. The techniques have been applied to the Cu-Al multilayer sample and sharply bound epitaxial phases are found, before and after heat treatment.

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“…[1][2][3][4][5][6][7][8] Panseri and Leoni first studied the phase equilibria on the Cu-Ti-Al system using thermal analysis. Considerable research has been contributed to the mechanical properties, microstructure, and phase equilibria of the Cu-Ti-Al alloys.…”

Section: Introductionmentioning

confidence: 99%

Phase equilibria and phase transformation of the body-centered cubic phase in the Cu-rich portion of the Cu–Ti–Al system

et al. 2008

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The phase equilibria and phase transformation of the body-centered cubic (bcc) phase in the Cu-Ti-Al system were investigated by the diffusion couple method, metallographic examination, differential scanning calorimetry, and x-ray diffraction. The isothermal sections at 700 and 900°C and vertical sections at 18 at.% Al, 22 at.% Al, and 25 at.% Al in the Cu-rich portion were determined. These results indicate that (i) the Cu 2 TiAl compound with the L2 1 Heusler structure has a larger solubility range; (ii) the stable B2 + L2 1 miscibility gap of the ordered bcc phase exists until the liquid phase, and the tie lines of this miscibility gap are almost parallel with the Cu-Ti side; (iii) the composition and temperature for the eutectic reaction (L ↔ B2 + L2 1 ) are about 7 at.% Ti and about 970°C, respectively, and (iv) the velocity of the eutectoid decomposition [bcc ↔ face-centered cubic (fcc) + D8 3 ] of the bcc phase with martensitic morphology in the Cu-Ti-Al alloys is slower than that of the Cu-Al alloys.

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Effect of titanium on the structure and mechanical properties of Cu-Al-Ti alloys

Cited by 4 publications

References 11 publications

In situ and ex situ transmission electron microscopy investigation of Cu–Al–Cu–Ti reactive metallic multilayer coatings

In situ and ex situ transmission electron microscopy investigation of Cu–Al–Cu–Ti reactive metallic multilayer coatings

Reactive Multilayers Examined by HRTEM and Plasmon EELS Chemical Mapping

Phase equilibria and phase transformation of the body-centered cubic phase in the Cu-rich portion of the Cu–Ti–Al system

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