Effect of Coatings on the Heat Resistance of VT-41 and VIT1 Alloys during Isothermal Oxidation
- Authors: Abraimov N.V.1, Ivanova A.Y.1
-
Affiliations:
- AO NPTs Gazoturbostroeniya Salyut
- Issue: Vol 2018, No 6 (2018)
- Pages: 565-572
- Section: Hardening and Coating Technologies
- URL: https://journals.rcsi.science/0036-0295/article/view/172588
- DOI: https://doi.org/10.1134/S0036029518060022
- ID: 172588
Cite item
Abstract
The influence of aluminide coatings on high-temperature α + β VT-41 alloy and a VIT1 alloy based on the Ti2NbAl orthophase on the isothermal heat resistance at 700°C is studied during oxidation in still air. NiCrAlY and Al(Si) coatings are found to substantially increase the heat resistance of the alloys at 700°C. The phase composition of the aluminosilicide layer (TiAl3 + TiSi2 + Ti5Si3) under the NiCrAlY coating significantly retards the titanium diffusion to the NiCrAlY layer and can be used as a diffusion barrier and a aluminum source for the NiCrAlY layer during high-temperature oxidation.
Keywords
About the authors
N. V. Abraimov
AO NPTs Gazoturbostroeniya Salyut
Author for correspondence.
Email: diagnostika@salut.ru
Russian Federation, Moscow
A. Yu. Ivanova
AO NPTs Gazoturbostroeniya Salyut
Email: diagnostika@salut.ru
Russian Federation, Moscow