Growth Kinetics of TiAl3 Diffusion Coating by Pack Cementation on Beta 21-S (2020)
- Authors:
- USP affiliated authors: CHAIA, NABIL - EEL ; COELHO, GILBERTO CARVALHO - EEL ; NUNES, CARLOS ANGELO - EEL ; COSSÚ, CAIO MARCELLO FELBINGER AZEVEDO - EEL
- Unidade: EEL
- DOI: 10.1007/s11669-020-00819-z
- Assunto: MATERIAIS
- Keywords: pack cementation; Beta-21S; TiAl3<sub>; diffusion coating; growth rate
- Agências de fomento:
- Language: Inglês
- Abstract: The growth kinetics of protective diffusion alu minide coatings were investigated on Ti based alloy Beta 21S. The coating was prepared by halide activated pack cementation using CrCl3 as transport agent and pure alu minum (high activity) as masteralloy. The coating was composed of only TiAl3 layer whose growth was controlled by solid state diffusion following a parabolic law. The morphology of the coating was quite similar with inter diffusion products present in a bulk semi-infinite diffusion couple as showed by previous literature studies. The transport phenomena are significantly affected by the alloying elements present in the alloys and dissolved in the coating layer. The activation energy estimated at 108 kJ mol-1 determined for temperatures in the range 660-760 C, indicates a bulk diffusion process with a possible grain boundary contribution and/or kinetic limi tations associated to the mobility of the gaseous species during the aluminization.
- Imprenta:
- Source:
- Título: Journal of phase equilibria and diffusion
- ISSN: 15477037
- Volume/Número/Paginação/Ano: v.41, p.181-190, 2020
- Este periódico é de assinatura
- Este artigo NÃO é de acesso aberto
- Cor do Acesso Aberto: closed
-
ABNT
CHAIA, N et al. Growth Kinetics of TiAl3 Diffusion Coating by Pack Cementation on Beta 21-S. Journal of phase equilibria and diffusion, v. 41, p. 181-190, 2020Tradução . . Disponível em: https://doi.org/10.1007/s11669-020-00819-z. Acesso em: 27 dez. 2025. -
APA
Chaia, N., COSSU, C. A. I. O. M. F. A., Parrish, C. J., Cotton, J. D., COELHO, G. C., & Nunes, C. A. (2020). Growth Kinetics of TiAl3 Diffusion Coating by Pack Cementation on Beta 21-S. Journal of phase equilibria and diffusion, 41, 181-190. doi:10.1007/s11669-020-00819-z -
NLM
Chaia N, COSSU CAIOMFA, Parrish CJ, Cotton JD, COELHO GC, Nunes CA. Growth Kinetics of TiAl3 Diffusion Coating by Pack Cementation on Beta 21-S [Internet]. Journal of phase equilibria and diffusion. 2020 ;41 181-190.[citado 2025 dez. 27 ] Available from: https://doi.org/10.1007/s11669-020-00819-z -
Vancouver
Chaia N, COSSU CAIOMFA, Parrish CJ, Cotton JD, COELHO GC, Nunes CA. Growth Kinetics of TiAl3 Diffusion Coating by Pack Cementation on Beta 21-S [Internet]. Journal of phase equilibria and diffusion. 2020 ;41 181-190.[citado 2025 dez. 27 ] Available from: https://doi.org/10.1007/s11669-020-00819-z - Creep behavior of conventional and Nb-modified as-cast MAR-M246 superalloy
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Informações sobre o DOI: 10.1007/s11669-020-00819-z (Fonte: oaDOI API)
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