Thermal cycling behavior of plasma-sprayed yttria-stabilized zirconia thermal barrier coating with La0.8Ba0.2TiO3− top layer

Fang, Yongchao; Cui, Xiufang; Yan, Chao; Chen, Zhuo; Jing, Yongzhi; Wen, Xin; Guo, Jingjie; Tian, Hongjing

doi:10.1016/j.ceramint.2021.11.159

Cited by 7 publications

(2 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermal shock resistance of all coatings was estimated by heating and water quenching method, which could significantly shorten the experimental time. 10,36,37 Each cycling process was as follows: the as-sprayed, laserremelted, and laser-alloyed specimens were first placed in an electric resistance furnace under the temperature of 1000 • C holding for 5 min, and then they were quickly taken from the furnace and were rapidly soaked in deionized water (25 • C). The number of thermal shock cycles when the spallation area reached to 20% of coating surface was used to estimate the thermal shock resistance of all coatings.…”

Section: Thermal Shock Testmentioning

confidence: 99%

Thermal shock resistance of thermal barrier coatings modified by selective laser remelting and alloying techniques

et al. 2022

View full text Add to dashboard Cite

Aiming to improve the thermal shock resistance of thermal barrier coatings (TBCs), the plasma-sprayed 7YSZ TBCs were modified by selective laser remelting and selective laser alloying, respectively, in this study. A self-healing agent TiAl 3 was introduced into the 7YSZ TBCs by selective laser alloying to fill cracks during thermal cycling. The thermal shock experiments of the plasma-sprayed, laser-remelted, and laser-alloyed TBCs were conducted by a means of heating and water-quenching method. Results revealed that some segmented microcracks were distributed on the surface of the laser-remelted and the laser-alloyed zones, showing a dense columnar crystal structure. After thermal shock tests, the numbers of segmented microcracks on the laser-remelted coating increased, whereas, in the laser-alloyed condition, some irregular particles formed, leading to the decreased numbers of segmented microcracks. The laser-alloyed coating exhibited the best thermal shock resistance, followed by the laser-remelted condition, with the thermal shock lifetime 3.3 and 2.7 times higher than that of the as-sprayed coating, respectively. On the one hand, both columnar grains and segmented microcracks in the laser-treated zone could effectively improve the strain tolerance of coatings. On the other hand, the oxidation products of TiAl 3 under high-temperature condition could seal the microcracks to postpone the crack connection. Thus, the thermal shock resistance of the laser-treated coatings was significantly improved.

show abstract

Section: Thermal Shock Testmentioning

confidence: 99%

Thermal shock resistance of thermal barrier coatings modified by selective laser remelting and alloying techniques

et al. 2022

View full text Add to dashboard Cite

show abstract

“…It was concluded that the hardness and wear behavior of coatings containing ZrO 2 were improved, while the friction coefficient decreased [ 38 ]. More recently, a solution of incorporating La oxides in different stoichiometry was found to be beneficial for thermal barrier applications [ 39 , 40 , 41 ]. For biomedical purposes, a Co-Cr alloy material was coated with different contents of HA-ZrO 2 mixtures, using the flame spraying method.…”

Section: Introductionmentioning

confidence: 99%

Considerations on the Wear Behavior of Vacuum-Remelted ZrO2-Reinforced Self-Fluxing Ni-Based Thermally Sprayed Alloys

Kazamer¹,

Muntean

Uţu

et al. 2023

Materials

View full text Add to dashboard Cite

Without proper post-processing (often using flame, furnace, laser remelting, and induction) or reinforcements’ addition, Ni-based flame-sprayed coatings generally manifest moderate adhesion to the substrate, high porosity, unmelted particles, undesirable oxides, or weak wear resistance and mechanical properties. The current research aimed to investigate the addition of ZrO2 as reinforcement to the self-fluxing alloy coatings. Mechanically mixed NiCrBSi-ZrO2 powders were thermally sprayed onto an industrially relevant high-grade steel. After thermal spraying, the samples were differently post-processed with a flame gun and with a vacuum furnace, respectively. Scanning electron microscopy showed a porosity reduction for the vacuum-heat-treated samples compared to that of the flame-post-processed ones. X-ray diffraction measurements showed differences in the main peaks of the patterns for the thermal processed samples compared to the as-sprayed ones, these having a direct influence on the mechanical behavior of the coatings. Although a slight microhardness decrease was observed in the case of vacuum-remelted samples, the overall low porosity and the phase differences helped the coating to perform better during wear-resistance testing, realized using a ball-on-disk arrangement, compared to the as-sprayed reference samples.

show abstract

Thermal properties of (Zr0.2Ce0.2Hf0.2Y0.2RE0.2)O1.8 (RE= La, Nd and Sm) high entropy ceramics for thermal barrier materials

Guo

Yu²,

Ma³

et al. 2022

Ceramics International

View full text Add to dashboard Cite

Thermal cycling behavior of plasma-sprayed yttria-stabilized zirconia thermal barrier coating with La0.8Ba0.2TiO3− top layer

Cited by 7 publications

References 54 publications

Thermal shock resistance of thermal barrier coatings modified by selective laser remelting and alloying techniques

Thermal shock resistance of thermal barrier coatings modified by selective laser remelting and alloying techniques

Considerations on the Wear Behavior of Vacuum-Remelted ZrO2-Reinforced Self-Fluxing Ni-Based Thermally Sprayed Alloys

Thermal properties of (Zr0.2Ce0.2Hf0.2Y0.2RE0.2)O1.8 (RE= La, Nd and Sm) high entropy ceramics for thermal barrier materials

Contact Info

Product

Resources

About