Cubic Titanium Trialuminide Thermal Spray Coatings—A Review

Gridasova

et al. 2009

The tribotechnical characteristics of dry friction against different materials are compared. It is established that nitrides and oxides present in the coatings improve the friction characteristics. It is found out that friction pairs containing similar metals have the highest seizure capability. The coating whose structure represents an intermetallic matrix with inclusions of solid phases as titanium borides and oxides has the best characteristics.

Section: Methodsmentioning

confidence: 69%

Section: Methodsmentioning

confidence: 99%

Tribotechnical characteristics of detonation coatings from mechanochemically synthesized Ti–Al–B powders

Gridasova

et al. 2009

“…Coatings based on titanium aluminides have composite structure representing an aluminide matrix with inclusions of high-modulus and low-plastic hard refractory compounds (in particular, carbides) and, thus, have high abrasive wear resistance [6]. A dispersion-hardening phase is most often introduced as an additive into the initial powder mixture for spraying.…”

Section: Introductionmentioning

confidence: 99%

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

Grechishkin

et al. 2010

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.

“…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%

“…However, these coatings often have poor tribotechnical characteristics. It is shown in [4] that the wear resistance of thermal-sprayed coatings based on titanium aluminides may be improved substantially when ultrafine inclusions of hard carbides form in their structure. We tested the coating containing TiC inclusions in a NiCr matrix that we developed and the commercial coating with Cr 3 C 2 inclusions in a NiCr matrix and revealed that the former was preferable.…”

Section: Introductionmentioning

confidence: 99%

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

Gridasova

et al. 2009

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.