Banerjee Pushpak, Roy Avinava, Sen Soumyadeep, Ghosh Arkajit, Saha Gourab, Seikh Asiful H, Alnaser Ibrahim A, Ghosh Manojit
Indian Institute of Engineering Science and Technology, Howrah, WB 711103, India.
Tampere University, Kalevantie 4, 33100 Tampere, Finland.
Heliyon. 2023 May 6;9(5):e16107. doi: 10.1016/j.heliyon.2023.e16107. eCollection 2023 May.
Countless research has suggested Yttria-stabilized Zirconia (YSZ) to be a top candidate for being implemented as thermal barrier coatings (TBC). However, when exposed to prolonged service, temperature and stress variations succeed in initiating a catastrophic phase transformation from tetragonal to monoclinic structure in Zirconia. Hence, the estimation of endurance for YSZ-based TBC is necessary to minimize failure in such situations. The main purpose of this research was to determine the relationship between tribological investigations and the estimated lifespan of YSZ coatings accurately. The study used various methods such as wear resistance testing, optical profilometry, specific wear rate, and coefficient of friction to estimate the maximum durability of TBCs. The research also provided insights into the composition and microstructure of the TBC system and found the optimized concentration of Yttrium doping to be 3.5 wt %. The study discovered that erosion was the main cause of roughness depreciation from SN to S1000. The estimation of the service life was primarily made based on optical profilometry, specific wear rate (SWR), coefficient of friction (COF) and wear resistance values which were further supported by the results of chemical characterization of the samples through electron dispersive spectroscopy (EDS), wavelength dispersive spectroscopy (WDS) and X-Ray Diffraction (XRD) analysis. The results were reliable and accurate and suggested future areas of investigation, such as 3D profilometry for surface roughness and thermal conductivity evaluation using laser-assisted infrared thermometers.
无数研究表明，钇稳定氧化锆（YSZ）是用作热障涂层（TBC）的最佳候选材料之一。然而，在长时间服役过程中，温度和应力变化会导致氧化锆发生从四方结构到单斜结构的灾难性相变。因此，有必要对基于YSZ的TBC的耐久性进行评估，以尽量减少此类情况下的失效。本研究的主要目的是准确确定摩擦学研究与YSZ涂层估计寿命之间的关系。该研究使用了各种方法，如耐磨性测试、光学轮廓测量、比磨损率和摩擦系数，以估计TBC的最大耐久性。该研究还深入了解了TBC系统的成分和微观结构，并发现钇掺杂的优化浓度为3.5 wt%。研究发现，冲蚀是从SN到S1000粗糙度降低的主要原因。使用寿命的估计主要基于光学轮廓测量、比磨损率（SWR）、摩擦系数（COF）和耐磨性值，通过电子能谱（EDS）、波长色散光谱（WDS）和X射线衍射（XRD）分析对样品进行化学表征的结果进一步支持了这些值。结果可靠且准确，并提出了未来的研究领域，如用于表面粗糙度的三维轮廓测量和使用激光辅助红外温度计进行热导率评估。
