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The influence of silicon content on the microstructure and high‐temperature oxidation behavior of aluminum‐silicon coatings on Ti‐6Al‐4 V alloy by hot dipping route.
- Source :
-
Materialwissenschaft und Werkstoffechnik . Dec2023, Vol. 54 Issue 12, p1580-1592. 13p. - Publication Year :
- 2023
-
Abstract
- The poor high‐temperature oxidation properties of Ti‐6Al‐4 V (titanium‐aluminum‐vanadium) alloy limit its applications under high‐temperature components of aero‐engines. In this study, the aluminum‐silicon coatings with different silicon content were fabricated on titanium‐aluminum‐vanadium alloy via the hot dipping route. A metallurgical bond was established at the interface between aluminum‐silicon coatings and substrates following the hot dipping. The results showed that three different coatings were formed: titanium(aluminum, silicon)3+ liquid‐(aluminum, silicon), titanium(aluminum, silicon)3+ τ2+ liquid‐(aluminum, silicon) and τ1+ τ2+ liquid‐(aluminum, silicon). Furthermore, the formation of aluminum‐silicon coatings was analyzed by diffusion path theory. The coated alloy was subjected to a high‐temperature oxidation test at 850 °C, and the weight gains were only 5.1 % to 22.4 % of the bare alloy. The coatings improved the high‐temperature oxidation resistance of titanium‐aluminum‐vanadium alloy. The most favorable oxidation behavior was noticed for the titanium(aluminum, silicon)3+liquid‐(aluminum, silicon) coatings. The higher the silicon content in titanium(aluminum, silicon)3+liquid‐(aluminum, silicon) coatings, the more excellent high‐temperature oxidation resistance was achieved. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09335137
- Volume :
- 54
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Materialwissenschaft und Werkstoffechnik
- Publication Type :
- Academic Journal
- Accession number :
- 174515728
- Full Text :
- https://doi.org/10.1002/mawe.202300061