Nanostructured Lanthanum Zirconate Coating and Its Thermal Stability Properties

Zhao, Xiaodong; Zeng, Kai; Xie, Jun; Zhenduo, Li

doi:10.1016/s1006-706x(08)60069-2

Cited by 6 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A systematic investigation with lower YSZ content (3 and 5%YSZ) N tbc revealed a significant increase in the porosity level after sintering at 1400 • C around nanostructured zones. Both densification and grain growth was also reported as mentioned in earlier paragraphs, though the 3%YSZ coating offered better sintering resistance than the other coating [15,88]. The sintering effects in N tbc with stainless steel substrate and YSZ topcoat was studied earlier for different thermal exposures at 1200 • C. The nano grain size increased from 63 nm for the as-sprayed state to 208 nm for sintering at 200 h. However, there was no change in the tetragonal phase zirconia during annealing [68] over the sintering time.…”

Section: Sintering Resistancementioning

confidence: 54%

“…EM and Hd. data for N tbc follows a bimodal distribution, as represented by a weibull distribution with shape and scale parameters [88]. This is reported to be both for the melted and unmelted zones in the bimodal structure.…”

Section: Bimodal Distributionmentioning

confidence: 85%

“…In TBCs, other microstructural features and effects of significance include porosity, microcracking, segmentation, residual stress control and post-spray thermal treatment [78][79][80][81][82][83][84][85][86][87][88].…”

Section: Microstructurementioning

confidence: 99%

“…(i) develop on top of the roughness crests (at the TGO/YSZ or TGO/ bond coat interface or within the TGO) and then propagate into the YSZ top coat, usually at off-peak locations where maximum tensile normal stresses are found [88] (ii) propagate in the top coat through the opening of pre-existing microcracks above the interface. Crack growth is particularly accelerated once the TGO grows beyond a critical thickness threshold [13].…”

Section: Crack Propagation and Failurementioning

confidence: 99%

See 3 more Smart Citations

Nano-Micro-Structured 6%–8% YSZ Thermal Barrier Coatings: A Comprehensive Review of Comparative Performance Analysis

Amarnath¹,

Moledina²,

Liu³

et al. 2021

Coatings

View full text Add to dashboard Cite

Beneficial properties achieved by nanostructuring effects in materials have generated tremendous interests in applications in surface engineering, especially in thermal barrier coatings (TBC). Limitations in conventional TBC processing for gas turbines and aero-propulsion systems have been exposed during past decades when rapid progress was made in nano-structuring coating research and developments. The present work is a comprehensive review of the current state of progress in nanostructured TBC (Ntbc) in reference to its microstructure, damage progression, failure mechanisms and a wide range of properties. The review aims to address the comparative performance analysis between the nanostructured and conventional (microstructured) 6–8 wt.% yttrium stabilized zirconia (YSZ) TBC systems. Oxidation resistance and sintering behavior in two TBCs are considered as the central focus of discussion. A few schematics are used to represent major microstructural features and failure progression. A performance analysis is performed for standard 2-layer, as well as functionally graded multilayer, TBC systems. A comparison of TBC characteristics processed by plasma spray and vapor deposition techniques is also made as reference. Compared to the sea of R&D efforts made for conventional TBC (Ctbc), limited experimental studies on Ntbc offers conflicting data, and prediction modeling and computational research are scarce.

show abstract

Section: Sintering Resistancementioning

confidence: 54%

Section: Bimodal Distributionmentioning

confidence: 85%