Effect of ion irradiation on the interdiffusion growth of aluminide phases in Ti–Al diffusion couple

Romankov, S.; Mamaeva, A.; Vdovichenko, E.; Ermakov, E.

doi:10.1016/j.nimb.2005.02.020

Cited by 8 publications

(4 citation statements)

References 8 publications

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“…The first approaches to obtaining the TiAl-based surface layers in titanium alloys were based on a vacuum annealing of titanium and aluminum coatings [31][32][33][34][35]. In this case, a reactive diffusion is the main mechanism for the formation of intermetallic layers, and it occurs both in the solid phase (up to the melting temperature of aluminum) [36][37][38][39][40] and in the liquid phase [41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the mentioned above research papers were focused on the development of the methods of the surface modification of the titanium alloys, or the approaches to form desirable intermetallic phases in Ti-Al system. For the initial characterization of the microstructure, metallography, scanning electron microscopy, and X-ray diffraction methods have been successfully used [7][8][9][10]13,17,30,31,33,35,36,42,51]. However, detailed study of the microstructure in gradient materials requires the application of analytical methods with high resolution, such as transmission electron microscopy, which was successfully used previously [14,22,32,34,42,46,54,58].…”

Section: Introductionmentioning

confidence: 99%

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TEM Study of a Layered Composite Structure Produced by Ion-Plasma Treatment of Aluminum Coating on the Ti-6Al-4V Alloy

et al. 2023

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Using the methods of transmission electron microscopy and energy-dispersive spectroscopy, we study the microstructure and phase composition of the coating and modified intermetallic layers obtained in a Ti-6Al-4V alloy by the deposition of the Al coating and subsequent processing in low-pressure non-self-sustained arc discharge plasma (CIPT—complex ion-plasma treatment). The deposition of the aluminum coating on the Ti-6Al-4V alloy is accompanied by the formation of a layered and a gradient microstructure: nanocrystalline near the “coating/substrate” interface and ultrafine-grained in the outer part of the aluminum coating, with α-stabilized region of ≈5 µm thick in the surface layer in base titanium alloy. After the CIPT, the coating and the surface of the base titanium alloy have a layered morphology: each of the layers possesses different grain structure and composition. In the direction from the outer surface of the specimen to the base material, the following phase sequence has been confirmed by diffraction and elemental analysis: TiAl3 → TiAl3 + nc-(Al(Ti) + α-Ti) → nc-(Al(Ti) + α-Ti) → TiAl3 → TiAl3 + TiAl → TiAl → Ti3Al → α-Ti alloy → (α + β)-Ti alloy. The nanocrystalline aluminum layer, which has been formed during the deposition of the aluminum coating, does not undergo phase transformation and recrystallization under the CIPT. Nanocrystalline structure can favor the interdiffusion of the elements between the coating and base material, and stimulate phase transformation in coarser grains situated under and over it.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TEM Study of a Layered Composite Structure Produced by Ion-Plasma Treatment of Aluminum Coating on the Ti-6Al-4V Alloy

et al. 2023

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“…Therefore, titanium aluminide coating on titanium surface will give good surface properties to titanium-based structural materials. Recently, several methods of titanium aluminide coating have been developed [2][3][4][5]. However, some of them require a series of plural processes, and some require advanced special equipments, or in some cases the bonding between the coating layer and the substrate is not enough for expecting excellent chemical and mechanical properties of the coated material.…”

Section: Introductionmentioning

confidence: 99%

Intermetallic Coating Using a 3-Dimensional Micro Welder

Matsuura

Mizuta

Kirihara

et al. 2009

MSF

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The authors have studied a new method of intermetallic coating using a small TIG welder. This method is based on a reaction between small liquid beads produced from very thin metal wire and the substrate metal surface. The authors designed a computer-aided 3-dimensional micro welder (3DMW) for a previous study on freeform fabrication of intermetallics, and have applied it to this study on intermetallic coating. In this study, a predetermined length of thin aluminum wire was fed onto the titanium substrate surface, and a spark was stricken from a thin electrode of a W-Ce2O3 alloy to make a small aluminum liquid bead on the titanium substrate surface and to simultaneously melt a small area of the substrate surface beneath the liquid bead. All process conditions had been programmed beforehand, including the length of the wire feeding per spark, the position of the electrode, electric power, movement of the stage holding the substrate, etc. The liquid bead containing aluminum and titanium rapidly solidified on the titanium substrate surface producing titanium aluminides on it. Repetition of the aluminum wire feeding, the electrode positioning and the spark striking produced a coating layer consisting of sub-layers of TiAl3, TiAl and Ti3Al from the surface side to the substrate side. Vickers hardness and wear resistance of the coated sample were remarkably improved.

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“…Recently, several methods of titanium aluminide coating have been developed and studied [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Titanium aluminide coating on titanium surface using three-dimensional microwelder

Mizuta

Matsuura

Kirihara

et al. 2008

Materials Science and Engineering: A

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Feasibility of a new method of titanium aluminide coating on titanium surface based on a reaction between aluminum liquid beads and the surface of titanium substrate has been studied using a computer aided 3-dimensional micro welder (3DMW) designed by the present authors. A predetermined length of thin aluminum wire was fed onto the substrate surface, and a spark was stricken from a thin electrode of a W-Ce 2 O 3 alloy to make a small aluminum liquid bead on the substrate surface and to simultaneously melt a small area of the substrate surface beneath the bead. All conditions including the length of the wire feeding, the position of the electrode, electric power etc. had been programmed beforehand. The liquid bead containing aluminum and titanium rapidly solidified on the titanium substrate surface producing titanium aluminides on it. Repetition of the aluminum wire feeding, the electrode positioning and the spark striking produced a coating layer consisting of sub-layers of TiAl 3 , TiAl and Ti 3 Al from the surface side to the substrate side. Vickers hardness and wear resistance of the coated sample were remarkably improved.

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Effect of ion irradiation on the interdiffusion growth of aluminide phases in Ti–Al diffusion couple

Cited by 8 publications

References 8 publications

TEM Study of a Layered Composite Structure Produced by Ion-Plasma Treatment of Aluminum Coating on the Ti-6Al-4V Alloy

TEM Study of a Layered Composite Structure Produced by Ion-Plasma Treatment of Aluminum Coating on the Ti-6Al-4V Alloy

Intermetallic Coating Using a 3-Dimensional Micro Welder

Titanium aluminide coating on titanium surface using three-dimensional microwelder

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