Arid
DOI10.1016/j.ceramint.2018.04.062
Molten salt attack on multilayer and functionally-graded YSZ coatings
Carpio, Pablo1; Dolores Salvador, M.1; Borrell, Amparo1; Navarro, Lucia1; Sanchez, Enrique2
通讯作者Carpio, Pablo
来源期刊CERAMICS INTERNATIONAL
ISSN0272-8842
EISSN1873-3956
出版年2018
卷号44期号:11页码:12634-12641
英文摘要

Thermal barrier coatings have been extensively studied in the last years in order to increase the operational temperature of the current gas turbines as well as to improve the coating lifetime. Many coating characteristics must be met to achieve these requirements (low thermal conductivity, high thermal fatigue resistance...); therefore, complex systems have been engineered for these purposes. One of the possibilities to optimise the different properties deals with the design of multilayer or functionally-graded coatings where various types of microstructures with different characteristics are combined.


One of the most important cause of gas turbines degradation relates to the attack of different type of particles which are suspended in the atmosphere (sand, fly ash...). These solid particles are molten at the operational temperatures and then, the molten salts chemically react with the coating. For this reason, the present research was focused on this type of attack.


In the present work, the molten salt attack of various YSZ coatings with multilayer and functionally-graded design was addressed. Two different type of microstructures were specifically combined for this design: the APS coating microstructure obtained from conventional (microstructured) powder and a bimodal structure with nanozones obtained from nanostructured feedstock. Besides, different salts were used to simulate different attack environments (desert sand and volcanic fly ash). Findings show that nanozones act as barrier against the penetration of molten salts toward deeper layer. However, a layer formed by nanozones can detach when the salt attack is too aggressive. Hence, functionally-graded coatings, where two types of microstructures are combined through the whole coating, become ideal to diminish the molten salt attack.


英文关键词Thermal spray deposition Chemical properties ZrO2 Thermal applications
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000436351700092
WOS关键词THERMAL-BARRIER COATINGS ; YTTRIA-STABILIZED ZIRCONIA ; MECHANICAL-PROPERTIES ; SILICATE GLASS ; RESISTANT ; MICROSTRUCTURE ; DAMAGE
WOS类目Materials Science, Ceramics
WOS研究方向Materials Science
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/208376
作者单位1.Univ Politecn Valencia, ITM, Cami Vera S-N, E-46022 Valencia, Spain;
2.UJI, ITC, Campus Univ Riu Sec,Av Sos Baynat S-N, Castellon de La Plana 12006, Spain
推荐引用方式
GB/T 7714
Carpio, Pablo,Dolores Salvador, M.,Borrell, Amparo,et al. Molten salt attack on multilayer and functionally-graded YSZ coatings[J],2018,44(11):12634-12641.
APA Carpio, Pablo,Dolores Salvador, M.,Borrell, Amparo,Navarro, Lucia,&Sanchez, Enrique.(2018).Molten salt attack on multilayer and functionally-graded YSZ coatings.CERAMICS INTERNATIONAL,44(11),12634-12641.
MLA Carpio, Pablo,et al."Molten salt attack on multilayer and functionally-graded YSZ coatings".CERAMICS INTERNATIONAL 44.11(2018):12634-12641.
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