研究目的
Investigating the solidification behavior of YSZ@Ni nanoparticles during the laser cladding process to produce a YSZ/metal thermal barrier coating.
研究成果
The YSZ@Ni coating produced by laser cladding is smoother, thicker, and more continuous than the YSZ/Ni coating. The study successfully analyzed the solidification behavior of YSZ@Ni nanoparticles, revealing the formation of primary YSZ phases and YSZ/(FeCr2O4) eutectic structures in the center of the molten pool, and equiaxed YSZ crystals along the edges. The findings provide guidelines for fabricating high-performing YSZ nanocoatings with well-distributed microstructure.
研究不足
The study focuses on the solidification behavior of YSZ@Ni nanoparticles during laser cladding but does not extensively explore the mechanical properties or long-term durability of the coatings under operational conditions.
1：Experimental Design and Method Selection:
The study used laser cladding to melt and solidify YSZ@Ni nanoparticles on Fe-Cr alloy substrates. The process involved a continuous wave CO2 laser with specific power and scanning speed settings.
2：Sample Selection and Data Sources:
Fe-Cr alloy plates were used as the matrix, and two types of powder (YSZ@Ni nanoparticles and nano-YSZ/Ni mixing powders) were prepared for the experiment.
3：List of Experimental Equipment and Materials:
A 5 kW HGL-JKR5080 sintering machine with a CO2 laser, SEM, XRD, and EDS for analysis.
4：Experimental Procedures and Operational Workflow:
The powders were preplaced on the Fe-Cr alloy surface, dried, and then sintered with a laser beam under controlled conditions. The morphology, phase distribution, and chemical composition of the coatings were analyzed.
5：Data Analysis Methods:
SEM, XRD, and EDS were used to analyze the microstructure, phase composition, and elemental distribution of the coatings.
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