Fabrication and oxidation behavior of Cr2AlC coating on Ti6242 alloy
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
An ∼ 5 μm Cr2AlC coating was synthesized on near-α titanium alloy Ti6242 using an industrially sized magnetron sputtering coater. Isothermal oxidation at 700 °C and 800 °C, and cyclic oxidation at 700 °C of the bare alloys and coated specimens were investigated in air. The results indicated that the Ti6242 alloy faced serious oxidation problems at 700 °C and 800 °C. Repeated formation and spallation of the multilayered oxide scale on the Ti6242 alloy occurred during oxidation testing. The coated specimens exhibited much better oxidation behaviour as compared to the bare alloy. A continuous Al-rich oxide scale formed on the coating surface during the initial oxidation stages. The oxide scale and coating itself acted as diffusion barriers blocking the further ingress of oxygen and protected the substrate alloy from oxidation. The oxidation mechanisms of the bare alloy and the coated specimens were investigated based on the experimental results.
Details
Original language | English |
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Pages (from-to) | 2343-2352 |
Number of pages | 10 |
Journal | Surface and Coatings Technology |
Volume | 204 |
Issue number | 15 |
Publication status | Published - 25 Apr 2010 |
Peer-reviewed | Yes |
Keywords
ASJC Scopus subject areas
Keywords
- CrAlC coating, MAX-phase, Near-α titanium alloy, Oxidation