Publication result detail

Oxidation Performance of Cold Spray Ti-Al Barrier Coated gamma-TiAl Intermetallic Substrates

ČÍŽEK, J.; MAN, O.; ROUPCOVÁ, P.; LOKE, K.; DLOUHÝ, I.

Original Title

Oxidation Performance of Cold Spray Ti-Al Barrier Coated gamma-TiAl Intermetallic Substrates

English Title

Oxidation Performance of Cold Spray Ti-Al Barrier Coated gamma-TiAl Intermetallic Substrates

Type

WoS Article

Original Abstract

Four blends of Al powder containing different amounts of Ti were deposited onto Ti-46Al-7Nb substrates as oxidation-protection layers using low-pressure cold spray. The coating morphology and chemical composition were assessed. Optimized heat treatment in protective atmosphere was carried out in order to induce formation of intermetallic phases within the deposits. The specimens were then subjected to 950'C exposure for 100, 250, and 500 hrs and their oxidation performance was monitored using the gravimetric method. It was found that the oxidation rate of the coating-protected specimens was substantially reduced (an increase in the weight gain of 1.37 mg/cm2 after 500 hrs of specimen with Al coating) as compared to their uncoated counterparts (1.21 mg/cm2 after 50 hrs at 900'C). The oxidation rates increased with increasing content of Ti in the coatings. Substantial changes of the coating integrity were recorded after the long-term oxidation testing.

English abstract

Four blends of Al powder containing different amounts of Ti were deposited onto Ti-46Al-7Nb substrates as oxidation-protection layers using low-pressure cold spray. The coating morphology and chemical composition were assessed. Optimized heat treatment in protective atmosphere was carried out in order to induce formation of intermetallic phases within the deposits. The specimens were then subjected to 950'C exposure for 100, 250, and 500 hrs and their oxidation performance was monitored using the gravimetric method. It was found that the oxidation rate of the coating-protected specimens was substantially reduced (an increase in the weight gain of 1.37 mg/cm2 after 500 hrs of specimen with Al coating) as compared to their uncoated counterparts (1.21 mg/cm2 after 50 hrs at 900'C). The oxidation rates increased with increasing content of Ti in the coatings. Substantial changes of the coating integrity were recorded after the long-term oxidation testing.

Keywords

cold spray, oxidation protection, TiAl, intermetallics, heat treatment

Key words in English

cold spray, oxidation protection, TiAl, intermetallics, heat treatment

Authors

ČÍŽEK, J.; MAN, O.; ROUPCOVÁ, P.; LOKE, K.; DLOUHÝ, I.

RIV year

2016

Released

04.04.2015

Publisher

Elsevier

ISBN

0257-8972

Periodical

SURFACE & COATINGS TECHNOLOGY

Volume

268

Number

4

State

Swiss Confederation

Pages from

85

Pages to

89

Pages count

5

URL

http://www.sciencedirect.com/science/article/pii/S0257897214011360

Full text in the Digital Library

http://hdl.handle.net/11012/57337

BibTex

@article{BUT110903,
  author="Jan {Čížek} and Ondřej {Man} and Pavla {Roupcová} and Kelvin {Loke} and Ivo {Dlouhý}",
  title="Oxidation Performance of Cold Spray Ti-Al Barrier Coated gamma-TiAl Intermetallic Substrates",
  journal="SURFACE & COATINGS TECHNOLOGY",
  year="2015",
  volume="268",
  number="4",
  pages="85--89",
  doi="10.1016/j.surfcoat.2014.12.004",
  issn="0257-8972",
  url="http://www.sciencedirect.com/science/article/pii/S0257897214011360"
}

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