Effect of Hf addition on initial microstructure of (Ni, Pt)Al coating and inhibiting the detrimental sulfur during high temperature exposure at 1150 °C
Source abstract
Abstract
Single-phase (Ni, Pt)Al coatings with and without Hf addition were prepared via electroplating a Pt/Pt-Hf layer and subsequent gaseous phase aluminisation. The initial microstructure and oxidation behaviour of two coatings were investigated comparatively. The results show that finer grains were obtained in Hf-doped Pt-plating layer and as-received (Ni, Pt)Al coating, which contributes to better high temperature performance and oxide scale peeling resistance. Additionally, Hf can effectively retard the θ-Al 2O 3 transformed to α-Al 2O 3 during the early oxidation and enhanced oxidation resistance during the stable oxidation. The effect of Hf on inhibiting detrimental sulfur in acid-(Ni, Pt)Al during high-temperature exposure were intensively discussed.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · High Entropy Alloys Studies · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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