Oxidation performance of cold spray Ti–Al barrier coated γ-TiAl intermetallic substrates

Man, Ondřej; Roupcová, Pavla; Loke, K.; Dlouhý, Ivo

doi:10.1016/j.surfcoat.2014.12.004

Cited by 22 publications

(7 citation statements)

References 24 publications

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“…Cizek et al 230 (3) Wang et al 97,232 deposited Fe-Al composite coatings and XRD results showed that with increasing annealing temperature, the content of the intermetallic compound increases (Figure 32a). The differential scanning calorimetry (DSC) analysis showed that Fe2Al5 was the first intermetallic phase formed upon heating at 625°C.…”

Section: Formation By Post Spray Heat Treatment Of Cold-sprayed Metalmentioning

confidence: 99%

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Assadi

Gaertner

et al. 2018

Critical Reviews in Solid State and Materials Sciences

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Cold spraying (CS) has been widely explored over the last decade due to its low process temperature and limited thermal effect on spray materials. As a solid-state process, the inherent deficiencies of traditional thermal spraying such as oxidation, decomposition and grain growth are avoided. This article summarizes the research work on the fabrication of composites and nanostructured coatings by the promising CS process. After a brief introduction to CS and its deposition mechanisms, the preparation methods of spray powders are classified. Different methods are appropriate for particles of various properties, and the tendency is to design composite powders by combined methods in order to create coatings with specified properties. Then the co-deposition mechanism of composite particles as well as research findings on metal-metal, metal-ceramic and metal-intermetallic composite coatings are reviewed concerning the deposition characteristics, microstructure and its relation to properties. Moreover, CS has been used to deposit a variety of nanostructured materials, including metals, metal-ceramic composites, and even ceramics, retaining their nanocrystalline nature in the coating without grain growth or phase transformation. Finally, the potential applications of CS and issues to be addressed in coating deposition are discussed.

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Section: Formation By Post Spray Heat Treatment Of Cold-sprayed Metalmentioning

confidence: 99%

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Assadi

Gaertner

et al. 2018

Critical Reviews in Solid State and Materials Sciences

View full text Add to dashboard Cite

show abstract

“…Intermetallic compounds of the Ti-Al system have good physical and mechanical properties [22], are resistant against oxidation up to the temperatures of 800-1000 • C [23][24][25], and possess high affinity with titanium, which provides high adhesive strength of the layers. In the Ti-Al system, intermetallic compounds with different stoichiometry can be formed, but usually there are three stable intermetallides: Ti 3 Al (with an ordered hcpbased structure), TiAl (with a tetragonal L1 0 lattice, c/a = 1.02), and TiAl 3 (with tetragonal D0 22 lattice, c/a = 2.22) [2].…”

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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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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“…Again, this is resolved by cold spraying as the method allows pore-free coating formation (a significant improvement over e.g., plasma spraying). Using kinetic energy in lieu of thermal input, the method is particularly suitable for deposition of metals [8,9]. As opposed to thermal spray processes such as plasma spray or HVOF, the temperatures involved in this process remain relatively low, thereby effectively eliminating oxidation of the materials.…”

Section: Introductionmentioning

confidence: 99%

Cold Sprayed Tungsten Armor for Tokamak First Wall

et al. 2019

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Harnessing nuclear fusion is a challenging task, in particular because of the demands put on the used materials. In tokamaks, future energy sources, the inner-most chambers are to be coated with dense coatings of W, or W-Cr-based alloys. So far, the attempts for such coatings formation by other methods failed due to oxidation, high porosity, insufficient adhesion, high specific surface, or even insufficient thickness below 10 μ m. Cold spraying seems a promising technology for the task. In our study, we demonstrate the first successful fabrication of thick pure W coatings. W-Cr and W-Cr-Ti coatings were further prepared without oxidation of the metals. All coatings exhibited high hardness levels, good interface quality with three tested substrates and, importantly, a promising potential for formation of stable Cr 2 WO x phases.

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Oxidation performance of cold spray Ti–Al barrier coated γ-TiAl intermetallic substrates

Cited by 22 publications

References 24 publications

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

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

Cold Sprayed Tungsten Armor for Tokamak First Wall

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