Formation of detonation coatings based on titanium aluminide alloys and aluminium titanate ceramic sprayed from mechanically alloyed powders Ti—Al

Oliker, V. E.; Sirovatka, V. L.; Timofeeva, I. I.; Gridasova, T. Ya.; Hrechyshkin, Ye.F.

doi:10.1016/j.surfcoat.2005.02.139

Cited by 27 publications

(12 citation statements)

References 14 publications

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“…The coatings behave differently due to their phase and structural distinctions, as shown in [7,8]. Analysis of wear tracks confirms that their fracture differs (Fig.…”

Section: Resultsmentioning

confidence: 68%

“…It is shown in [7,8] that coatings with fundamentally different phase compositions and structures may form in the detonation spraying of mechanically activated nanocomposite Ti-Al and Ti-Al-B powders by varying the conditions in which they interact with gas media. Thus, it is established that a microcomposite coating with an intermetallic (Al 3 Ti, γ-TiAl) matrix with inclusions of titanium boride (TiB, TiB 2 ) about 1.5 µm in size forms when argon is used to transport Ti-50 at.% Al-25 at.% B powder to the detonation area, the average distance between the inclusions being about 5 µm (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Abrasive wear resistance of detonation coatings from mechanochemically alloyed Ti–Al–B powders

Oliker

Sirovatka

Grechishkin

et al. 2010

Powder Metall Met Ceram

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The paper examines the abrasive wear resistance of composite detonation coatings with different structures based on Ti-Al-B, Ti-Al-B-O, and Ti-Al-B-N systems. It is established that the coating consisting of an intermetallic matrix and solid-phase inclusions as titanium borides and oxides has the highest characteristics. The coating whose microstructure is based on a random two-phase mixture of relatively soft intermetallic and nitride phases and whose hard component is represented only by borides has the lowest wear resistance.

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“…The coatings behave differently due to their phase and structural distinctions, as shown in [7,8]. Analysis of wear tracks confirms that their fracture differs (Fig.…”

Section: Resultsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Abrasive wear resistance of detonation coatings from mechanochemically alloyed Ti–Al–B powders

Oliker

Sirovatka

Grechishkin

et al. 2010

Powder Metall Met Ceram

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“…3b). We previously analyzed a coating without boron sprayed in the same conditions from mechanically alloyed Ti-Al powder, which contained one phase as aluminum titanate Al 2 TiO 5 [3]. The reactions to form this compound may proceed in one stage in which titanium aluminides interact with oxygen and in two stages in which interim aluminum and titanium oxides are present: 2Al 2 O 3 + TiO 2 = Al 2 TiO 5 .…”

Section: Resultsmentioning

confidence: 99%

“…Coatings based on γ-TiAl and titanium trialuminide are most often used to protect parts against high-temperature oxidation [1][2][3][4]. However, these coatings often have poor tribotechnical characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…It is shown in [3] that nanostructured, mechanically alloyed polyphase Ti-Al powders in combination with blast detonation and nonequilibrium temperature-time conditions of gas formation in detonation spraying permit obtaining metastable phases and extending their ranges of stability. It is also shown that different coatings with desired properties may form by selecting gas that has a specific effect on the powder during detonation spraying (in particular, compressed air, nitrogen or argon may be used to transport the powder to the detonation area).…”

Section: Introductionmentioning

confidence: 99%

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Effect of gas media on the structural evolution and phase composition of detonation coatings sprayed from mechanically alloyed Ti–Al–B powders

Oliker

Sirovatka

Gridasova

et al. 2009

Powder Metall Met Ceram

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The paper examines the phase formation of detonation coatings sprayed from mechanically alloyed . It is shown that coatings with different phase compositions and functional properties can be consolidated from this activated powder by varying process conditions (including gas composition during detonation spraying). Three types of composite coatings with different structures are obtained: TiB and TiB 2 inclusions are distributed in an intermetallic matrix (Al 3 Ti, γ-TiAl); inclusions of oxides and oxynitrides are additionally present in the same structure; inclusions of borides, Al, and Ti are distributed in a mixture of intermetallic and nitride (TiN, AlN) phases.

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Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

2020

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Thanks to a considerable number of fascinating properties, titanium (Ti) and Ti alloys play important roles in a variety of industrial sectors. However, Ti and Ti alloys could not satisfy all industrial requirements; the degradation of Ti and Ti alloys always commences on their surfaces in service, which declines the performances of Ti workpieces. Therefore, with aim to further improve their mechanical, corrosion and biological properties, surface modification is often required for Ti and Ti alloys. This article reviews the technologies and recent developments of surface-modification methods with respect to Ti and Ti alloys, including mechanical, physical, chemical, and biochemical technologies. Conventional methods have limited improvement in the properties and/or restriction on the geometry of workpieces. Therefore, many advanced surfacemodification technologies have emerged in recent decades. New methods make Ti and Ti alloys have better performance and extended applications. With requirement of high surface properties in future. Understanding the mechanism in various surface-modification methods, combining the advantages of current technologies and developing new coating materials with high performance are required urgently. As such, incorporation of different surface-modification technologies with high-performance modified layers may be the mainstream of surface modifications for Ti and Ti alloys. . His current research interests focus on the metal additive manufacturing (e.g., selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructureproperties in high-performance materials.

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Formation of detonation coatings based on titanium aluminide alloys and aluminium titanate ceramic sprayed from mechanically alloyed powders Ti—Al

Cited by 27 publications

References 14 publications

Abrasive wear resistance of detonation coatings from mechanochemically alloyed Ti–Al–B powders

Abrasive wear resistance of detonation coatings from mechanochemically alloyed Ti–Al–B powders

Effect of gas media on the structural evolution and phase composition of detonation coatings sprayed from mechanically alloyed Ti–Al–B powders

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

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