Nb2O5/Ta2O5 + Sc2O3 codoped zirconia as a thermal barrier coating for turbines application

• Grant number: 13/14189-8
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: November 01, 2013
• End date: September 30, 2016
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Márcio Raymundo Morelli
• Grantee: Roger Honorato Piva
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Turbines are fundamental systems for current technology. Some decades ago, research on turbines were restricted to aircraft science. However, the high future energy demand has introduced a wide spread use of land gas turbines for electrical energy generation. Both applications cited require high energy efficiency, in addition to the trend toward use of fuels of low quality. For this generation of turbines that will operate at high temperatures and corrosive environments, will be required research in development of materials with superior properties to commonly used. This project proposes the development of tetragonal zirconia stabilized using charge-compensating mechanism: (ZrO2)1-(x+y)(InO1,5)x(MOz)y (MOz = TaO2,5, NbO2,5, MoO3 and WO3), for application as a thermal barrier coating to internal turbines components. The zirconia will be characterized as to its elastic modulus, fracture toughness, thermal conductivity and, mainly, resistance to hot corrosion by exposure to V2O5, NaVO3 and Na2SO4. It is expected that the stabilization with oxides proposed will result in enhance corrosion resistance, reduction in thermal conductivity of the coating and also, increase the temperature at which the tetragonal phase is stable. These improvements are important for the development of new generations of turbines more efficient and with components less susceptible to hot corrosion. (AU)

Scientific publications

(12)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PIVA, R. H.; PIVA, D. H.; VENTURINI, J.; FLORIANO, R.; MORELLI, M. R.. Inhibition of order-disorder phase transition and improvements in the BICUVOX.1 properties by using yttria-stabilized zirconia particles. CERAMICS INTERNATIONAL, v. 41, n. 1, A, p. 171-177, JAN 2015. (13/14189-8)

PIVA, R. H.; PIVA, D. H.; PIERRI, J. J.; MONTEDO, O. R. K.; MORELLI, M. R.. Azeotropic distillation, ethanol washing, and freeze drying on coprecipitated gels for production of high surface area 3Y-TZP and 8YSZ powders: A comparative study. CERAMICS INTERNATIONAL, v. 41, n. 10, B, p. 14148-14156, DEC 2015. (13/14189-8)

PIVA, R. H.; PIVA, D. H.; MORELLI, M. R.. Thermal stability and phase transformation in fully indium oxide (InO1.5) stabilized zirconia. MATERIALS CHARACTERIZATION, v. 123, p. 58-66, JAN 2017. (13/14189-8)

PIVA, D. H.; PIVA, R. H.; ROCHA, M. C.; DIAS, J. A.; MONTEDO, O. R. K.; MALAVAZI, I.; MORELLI, M. R.. Antibacterial and photocatalytic activity of ZnO nanoparticles from Zn(OH)(2) dehydrated by azeotropic distillation, freeze drying, and ethanol washing. ADVANCED POWDER TECHNOLOGY, v. 28, n. 2, p. 463-472, FEB 2017. (13/14189-8)

PIVA, R. H.; PIVA, D. H.; MONTEDO, O. R. K.; MORELLI, M. R.. Improving physical properties of cubic InO1.5-stabilized zirconia by alloying with MoO3. Journal of Alloys and Compounds, v. 685, p. 593-603, NOV 15 2016. (13/14189-8)

PIVA, R. H.; PIVA, D. H.; VENTURINI, J.; FLORIANO, R.; MORELLI, M. R.. Inhibition of order-disorder phase transition and improvements in the BICUVOX.1 properties by using yttria-stabilized zirconia particles. CERAMICS INTERNATIONAL, v. 41, n. 1, p. 7-pg., 2015-01-01. (13/14189-8)

ROGER HONORATO PIVA; DIÓGENES HONORATO PIVA; MÁRCIO RAYMUNDO MORELLI. Synthesis by coprecipitation of india-stabilized zirconia and codoping with MoO3, WO3, TaO2.5, or NbO2.5 for application as thermal barrier coatings. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 19, n. 1, p. 31-39, Fev. 2016. (13/14189-8)

KLEGUES MONTEDO, OSCAR RUBEM; FALLER, CRISTIAN ARNALDO; BERTAN, FERNANDO MARCO; JIUSTI, JEANINI; PIVA, ROGER HONORATO; PIVA, DIOGENES HONORATO. Microstructural development and electrical behavior during crystalization of iron-rich glass-ceramics obtained from mill scale. CERAMICS INTERNATIONAL, v. 43, n. 15, p. 11864-11873, OCT 15 2017. (13/14189-8)

ROGER HONORATO PIVA; DIÓGENES HONORATO PIVA; MÁRCIO RAYMUNDO MORELLI. Synthesis by coprecipitation of india-stabilized zirconia and codoping with MoO3, WO3, TaO2.5, or NbO2.5 for application as thermal barrier coatings. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 19, n. 1, p. 31-39, 2016-02-05. (13/14189-8)

PIVA, DIOGENES HONORATO; PIVA, ROGER HONORATO; ROCHA, MARINA CAMPOS; KLEGUES MONTEDO, OSCAR RUBEM; MORELLI, MARCIO RAYMUNDO. Resistance of InO1.5-stabilized tetragonal zirconia polycrystals to low-temperature degradation. Materials Letters, v. 163, p. 226-230, JAN 15 2016. (13/14189-8)

MONTEDO, O. R. K.; ALVES, I. T.; FALLER, C. A.; BERTAN, F. M.; PIVE, D. H.; PIVA, R. H.. Evaluation of electrical properties of glass-ceramics obtained from mill scale. Materials Research Bulletin, v. 72, p. 90-97, DEC 2015. (13/14189-8)

PIVA, R. H.; PIVA, D. H.; PIERRI, J. J.; MONTEDO, O. R. K.; MORELLI, M. R.. Azeotropic distillation, ethanol washing, and freeze drying on coprecipitated gels for production of high surface area 3Y-TZP and 8YSZ powders: A comparative study. CERAMICS INTERNATIONAL, v. 41, n. 10, p. 9-pg., 2015-12-01. (13/14189-8)