Thickness-dependent fcc–hcp phase transformation in polycrystalline titanium thin films

Chakraborty, Jay; Kumar, K. Kishor; Ranjan, Rajeev; Chowdhury, Sandip Ghosh; Singh, Sandeep

doi:10.1016/j.actamat.2010.12.046

Cited by 83 publications

(59 citation statements)

References 45 publications

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“…(~ 144nm thick film) and 15min. (~ 432nm thick Ti films) [4]. For both phases strength and sharpness of the out of-plane texture increases with increasing film thickness.…”

Section: Thickness Dependence: Polycrystalline Thin Filmsmentioning

confidence: 99%

“…In the last section of the paper, stability of hcp Ti phase in polycrystalline Ti thin films has been considered from a thermodynamic point of view. Figure 1: (a) Change of crystallite size with film thickness in Zr thin films [8]; (b) Change of strain free lattice parameters ratios (c o /a o ) in Zr thin films with film thickness [8]; (c) Lattice expansion in Nb thin films with decreasing crystallite size [9]; (d) Lattice expansion of hcp titanium in Ti thin films with decreasing deposition time (or film thickness) [4].…”

Section: Thickness Dependence: Polycrystalline Thin Filmsmentioning

confidence: 99%

“…deposition time) to 10nm (for 5min. deposition time) [4]. In this case, specific volume of hcp Ti phase has been calculated from the strain free lattice parameters (determined from the diffraction stress analysis) of hcp Ti phase [4].…”

Section: Thickness Dependence: Polycrystalline Thin Filmsmentioning

confidence: 99%

“…Many metal films (Ni, Ti etc.) exhibits structural instability below certain critical film thickness where the film materials show metastable phases having crystal structures different than their equilibrium counterparts [1][2][3][4][5]. Sometime, the metastable structure coexists with the equilibrium phase in certain film thickness regime.…”

Section: Introductionmentioning

confidence: 99%

“…Thickness dependent structural phase transformation has been reported both in epitaxial and polycrystalline metallic thin films over the last decades [1][2][3][4][5]. Many metal films (Ni, Ti etc.)…”

Section: Introductionmentioning

confidence: 99%

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Phase Transformation in Ultra-Thin Films

Chakraborty

2014

AMR

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“…(~ 144nm thick film) and 15min. (~ 432nm thick Ti films) [4]. For both phases strength and sharpness of the out of-plane texture increases with increasing film thickness.…”

Section: Thickness Dependence: Polycrystalline Thin Filmsmentioning

confidence: 99%

Section: Thickness Dependence: Polycrystalline Thin Filmsmentioning

confidence: 99%

Section: Thickness Dependence: Polycrystalline Thin Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phase Transformation in Ultra-Thin Films

Chakraborty

2014

AMR

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Characterization of Electrochemical and Biocompatibility of Zinc Oxide Coating Electrodeposited on Commercial Pure Titanium Alloy

Torabianfard,

Jamaati,

Jamshidi Aval

2024

Adv Eng Mater

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This study examines how the duration of electrodeposition affects the morphology and electrochemical characteristics of zinc oxide coatings applied to a pure titanium substrate. The morphology of the coating and the phases present within it were analyzed using a scanning electron microscope and the X‐ray diffraction technique. The coating’s resistance to corrosion in a phosphate‐buffered saline solution was evaluated using two electrochemical methods: impedance spectroscopy and potentiodynamic polarization tests. The surface roughness of the coated samples was assessed using interferometry. The results demonstrate that an increase in electrodeposition time, ranging from 150 to 1200 seconds, leads to an enhanced texture intensity in the (0002) and (010) planes of the ZnO coating. Furthermore, the thickness of the ZnO crystals and surface roughness increases by factors of 3.25 and 2.79, respectively, as the deposition time is extended. This extended duration results in the formation of larger needle‐shaped and flower‐like ZnO crystals, leading to a significantly non‐uniform structure. Correspondingly, the corrosion rate also increases as the electrodeposition time is extended from 150 to 1200 seconds, rising from 0.001951 to 9.117 µm/year. The lowest corrosion rate (1.654 µm/year) is achieved in coatings deposited for 300 seconds using a potential of 3 V.This article is protected by copyright. All rights reserved.

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