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  • 1
    Electronic Resource
    Electronic Resource
    Degradation Evaluation of the Gas Turbine Hot-Gas-Path Component (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 2266-2271 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Degradation of the gas turbine hot-gas-path components, the 1st stage blades and vanes, serviced for a period was evaluated by measuring the mechanical properties. For this, tensile and impact tests on these gas turbine parts were performed. Microstructure of the substrate and coating layers were also observed. The mechanical properties of the serviced blades were degraded by about 30% comparing with those of unused ones. In terms of the microstructure, the dissolution of the secondary g’ phase and subsequent coarsening of precipitates were observed in the substrate. And the interdiffusion zone near the coating layer was disappeared
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.2266.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Development of Integrated Materials Database System for Plant Facilities Maintenance & Optimization (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 2681-2686 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Features of the materials database system for plant facilities management are discussed here. Korea Electric Power Research Institute (KEPRI) has developed web-based materials database system for power plant engineers with an aim to give them the integrated materials information which is needed in solving material-related problems frequently occurred in plant maintenance activities. The materials database system contains more than twenty thousands material standard data of eight countries including chemical composition, mechanical properties, and their applications in the power plant facilities. Using the system, users can find useful information of equivalent material standards and physical or chemical environments where the material is applied. Integration of material data with facility data is expected to give more valuable information to plant engineers in solving their material related problems. The database system also adopted state-of-arts extensible markup language (XML) technology and was designed to share its data easily with other information systems such as plant engineering expert system, materials management system, enterprise resource planning (ERP) system and so on
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.2681.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The Thermal Cyclic Behavior of the TBCs with the MCrAlY Coating Method (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 631-634 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The rotating components in the hot sections of land-based gas turbine are exposed tosevere environment during several tens thousand hours at above 1100則 operating temperature. Toprotect such components from high temperature oxidation, an intermediate bond coat is applied,typical of a MCrAlY-type metal alloy. Various processing methods have been studied for bond coatdeposition. This study is concerned with the thermal cyclic behavior of thermal barrier coatings.The MCrAlY bond coatings are deposited by a vacuum plasma, low vacuum plasma and highvelocityoxygen fuel spray on a nickel-based superalloy (GTD-111). Thermal cyclic tests at 1100則in still air for various periods of time were used to evaluate the thermal cyclic resistance of the TBCcoating with the various processing sprayed bond coating layer. The microstructure andmorphology of as-sprayed and of thermal cycled coatings were characterized by scanning electronmicroscopy (SEM) equipped with energy dispersive spectroscopy (EDS) and X-ray diffraction(XRD). The order of thermal cyclic resistance was YSZ-VPS bond coat, YSZ-LVPS and YSZHVOF.The influence of bond coat spray methods on durability of TBCs is discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.631.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The Thermal Cyclic Behavior of the VPS and HVOF-Sprayed MCrAlY Coatings (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1141-1144 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Rotating components used in the hot sections of land-based gas turbine are exposed tosevere environment of several ten thousands operating hours above 1100[removed info]. To protect suchcomponents against high temperature oxidation an intermediate bond coat is applied, typical of aMCrAlY-type metal alloy. Various processing methods have been studied for bond coat deposition.This study is concerned with the cyclic oxidation behavior of CoNiCrAlY coatings. Coatingswere deposited by a vacuum plasma spray and high-velocity oxygen fuel method on a nickel-basedsuperalloy (GTD-111). Cyclic thermal oxidation test condition is at 1100[removed info] in ambient air forvarious periods of time. Tests were used to evaluate the oxidation resistance of the spray-coatedspecimens. The microstructure and morphology of as-sprayed and of tested specimens werecharacterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD).The oxide phases formed on the coating surface are NiO, CoCr2O4, and Al2O3. The nickel oxideof them was to be dominant with increasing cycles. The differences in microstructure and phasecomposition in the interface with coating layer are reported. The influence of coating processmethods on coating characteristics and degradation mechanisms is discussed. The HVOF coatingwith the splats was more resistant on the high temperature oxidation than the VPS coating
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1141.pdf
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    Paper (German National Licenses)
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