Effect of Cr addition on the properties of aluminide coating layers formed on TiAl alloys
SCIE
SCOPUS
- Title
- Effect of Cr addition on the properties of aluminide coating layers formed on TiAl alloys
- Authors
- Jung, HG; Jung, DJ; Kim, KY
- Date Issued
- 2002-05-01
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- TiAl alloys were coated by two different processes with a simple aluminide coating and a Cr+Al-type composite coating for the improvement of oxidation resistance of the alloy. Simple aluminizing was applied to TiAl-XCr (X = 1, 4, 6 at.%) alloys. A Cr+Al-type composite coating was performed by Cr evaporation on the TiAl substrate followed by pack aluminizing. A simple aluminide coating applied to the Cr-added TiAl alloys showed improvement of ductility and oxidation resistance. This was mainly due to grain refinement of the Cr-added coating layer. The coating layer formed by the composite coating process consisted of the Al4Cr outer layer and TiAl3 inner layer. However, these coating layers were transformed to a Ti(Al,Cr)(3) layer with a Ll(2) structure during oxidation. This layer showed much better ductility compared to other coating layers and superior oxidation resistance in cyclic oxidation tests. (C) 2002 Elsevier Science B.V All rights reserved.
- Keywords
- alumininide coating; TiAl alloys; Cr evaporation; ductility; grain refinement; L1(2)-Ti(Al,Cr)(3); L12 COMPOUNDS; INTERMETALLIC COMPOUND; MECHANICAL-PROPERTIES; OXIDATION RESISTANCE; PACK-CEMENTATION; AL-CR; BEHAVIOR; IMPROVEMENT; PHASE; MN
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19088
- DOI
- 10.1016/S0257-8972(01)01716-9
- ISSN
- 0257-8972
- Article Type
- Article
- Citation
- SURFACE & COATINGS TECHNOLOGY, vol. 154, no. 1, page. 75 - 81, 2002-05-01
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- There are no files associated with this item.
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