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Keywords: oxidation
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2025, 147(3): 031023.
Paper No: GTP-24-1336
Published Online: October 15, 2024
.... The silica growth and phase transformation appear critical in predicting EBC lifetime and several strategies have been explored to reduce the oxide growth rate and improve EBC durability at elevated temperatures. Advanced characterization using Raman spectroscopy has helped clarify this system. References...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2024, 146(9): 091007.
Paper No: GTP-23-1610
Published Online: March 11, 2024
... were similar with and without impurities with the formation of thick, duplex Fe-rich scales in all cases including the observation that Fe 2 O 3 only formed with 1%O 2 . For the austenitic steels, higher mass gains were observed at all temperatures with increased formation of Fe-rich oxides when...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2024, 146(9): 091004.
Paper No: GTP-23-1405
Published Online: March 11, 2024
... surface roughness, and environmental exposure, which results in the formation of a thermally grown oxide layer (TGO) layer. Current estimates of the EBC bond strength to a substrate are made assuming that the applied force divided by pull tab area is a representative metric. Although this is an expedient...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2022, 144(12): 121009.
Paper No: GTP-22-1334
Published Online: October 7, 2022
... times for NG7 being almost a factor of two faster than those for NG6 at compressed temperatures of ( T C ) ≤ 1000 K. This is due to the low temperature chain branching reactions that occur for higher alkane oxidation kinetics in this temperature range. On the contrary, at T C > 1000 K, NG6 exhibits...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2021, 143(12): 121025.
Paper No: GTP-21-1363
Published Online: October 13, 2021
...-mail: gilles.bourque@siemens-energy.com e-mail: henry.curran@nuigalway.ie 13 07 2021 15 07 2021 13 10 2021 chemical kinetics gas turbines internal combustion engines oxidation natural gas ST IDT correlation Science Foundation Ireland 10.13039/501100001602 The authors...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2021, 143(3): 031004.
Paper No: GTP-20-1472
Published Online: February 8, 2021
... oxide (TGO) layer between the substrate and EBC. In advanced ceramic material systems such as coated ceramic matrix composites (CMCs), the TGO layer is the weak interface and directly influences component lifetimes. The effects of surface roughness and TGO thickness on the adhesion strength were...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 2012, 134(4): 041501.
Published Online: January 25, 2012
... complemented by modeling using the PREMIX module of Chemkin to provide insights into and to validate combined models describing the oxidation chemistry of surrogate fuels depicting kerosene, fatty acid methyl ester biofuels, and Fischer-Tropsch derived fuels. Sensitivity analysis has identified important...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2012, 134(1): 012101.
Published Online: October 28, 2011
...H. M. Tawancy; Luai M. Al-Hadhrami It is known that the relative performance of thermal barrier coatings is largely dependent upon the oxidation properties of the bond coat utilized in the system. Also, the oxidation properties of diffusion-type bond coats (aluminides and their modifications...
Journal Articles
Bruce A. Pint, Michael P. Brady, Yukinori Yamamoto, Michael L. Santella, Philip J. Maziasz, Wendy J. Matthews
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2011, 133(10): 102302.
Published Online: May 6, 2011
... for primary surface recuperators, three commercially cast heats have been rolled to ∼ 100 μ m thick foil in the laboratory to evaluate performance in creep and oxidation testing. Results from initial creep testing are presented at 675 ° C and 750 ° C , showing excellent creep strength compared with other...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2011, 133(9): 092102.
Published Online: April 15, 2011
... oxidation behavior of these materials, particularly in the presence of water vapor. 28 06 2010 19 07 2010 15 04 2011 15 04 2011 austenitic stainless steel casting creep fracture gas turbines high-temperature effects oxidation thermal stress cracking Oak Ridge...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2011, 133(8): 082101.
Published Online: April 8, 2011
... of these blades. HPT blades made of the nickel-based superalloy Mar-M002 have been found to suffer from stress assisted grain boundary oxidation (SAGBO) cracking. HPT blades removed from an RB211-24C aeroderivative industrial GTE were sectioned, and the cracks and microstructure were studied using scanning...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2011, 133(7): 072102.
Published Online: March 22, 2011
...Girish M. Shejale Gas turbine components such as nozzle segments, buckets, transition pieces, and combustion liners experience damages such as creep, fatigue, high temperature oxidation, and corrosion. The reliability, availability, and efficiency of high temperature gas turbine parts are based...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 2011, 133(4): 042302.
Published Online: November 23, 2010
... International, Inc.). When exposed to the harsh operating environment of the microturbine PSR, HR-120 forms a protective oxide scale that is resistant to the effects of the water vapor present in the exhaust gas. Long-term accelerated microturbine testing with samples in a modified PSR with a removable aft dome...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2010, 132(10): 102912.
Published Online: July 7, 2010
...–Bi. For an oxygen concentration lower than the one necessary for magnetite formation (approximately < 10 − 8 wt % at T ≈ 500 ° C for Fe-9Cr steels), corrosion proceeds by dissolution of the steel. For a higher oxygen content dissolved in Pb–Bi, corrosion proceeds by oxidation of the steel...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2010, 132(3): 031401.
Published Online: December 3, 2009
... an exhaust of CO. This CO is mixed with steam and converted to H 2 and CO 2 using the water-gas shift reaction (WGSR). Chemical looping uses two reactions with a recirculating oxygen carrier to oxidize hydrocarbons. The resulting oxidation and reduction stages are preformed in separate reactors—the oxidizer...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2010, 132(3): 032805.
Published Online: November 30, 2009
... was aimed to develop a kinetic model, which can be used for the prediction of lubricant oxidative degradation correlated with endurance test conducted on engines. Knowing that base oils are a complex blend of paraffins and naphthenes with a wide range of sizes and structures, their chemistry analysis during...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2010, 132(2): 022103.
Published Online: November 5, 2009
...H. M. Tawancy; Luai M. Al-Hadhrami Current technology of thermal barrier coating systems used in gas turbine blade applications relies on the use of a metallic bond coat, which has a twofold function: (i) it develops a thin layer of aluminum oxide enhancing the adhesion of the ceramic top coat...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2010, 132(2): 022302.
Published Online: November 5, 2009
... ( ∼ 1200 ° F ) . Numerous studies have shown that the presence of water vapor greatly accelerates the oxidation rate of type 347 stainless steel at temperatures above 650 ° C ( ∼ 1200 ° F ) . Water vapor is present as a product of combustion in the microturbine exhaust, making it necessary to find...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2009, 131(6): 062902.
Published Online: July 16, 2009
...Celine Cabet; Fabien Rouillard Cooling helium of high temperature reactors (HTRs) is expected to contain a low level of impurities: oxidizing gases and carbon-bearing species. Reference structural materials for pipes and heat exchangers are chromia former nickel base alloys, typically alloys 617...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2009, 131(5): 052904.
Published Online: June 10, 2009
... improvement of the safety of graphite moderator reactors. In this study, the oxidation-induced density changes in nuclear graphite for very high temperature reactor were determined by a conventional destructive bulk density measurement method (BM) and by a new nondestructive method based on acoustic...
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