Improvement mechanism of the oxidation resistance of Al-doped Ti(C,N)-based cermets: Influence of enriched Al in the subsurface oxide layer
Source abstract
Abstract
The effects of Al doping on the oxidation kinetics and oxidation mechanism of Ti(C,N)-based cermets were investigated systematically. During the preparation process, Al derived from decomposed AlN powders promoted the precipitation of (Ni,Co) 3 Al nanoparticles in the binder phase of the cermets. The formation of (Ni,Co)(W,Mo)O 4 and Co 2NiO 4 oxides provided essential oxidation resistance for the cermets. The presence of (Ni,Co) 3 Al nanoparticles was found to promote oxidation resistance by forming a continuous (Ni,Co)(Ti,Al)O 3 layer within subsurface oxide layers. After 20 h of oxidation at 800 ℃, the weight gain of cermets containing 2.0 wt% AlN was only 67.49 % of that of the pure cermets.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced materials and composites · Advanced ceramic materials synthesis · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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