Research and Development of Ceramic Turbine Wheels

Watanabe, Keiichiro; Masuda, Masaaki; Ozawa, Tadao; Matsui, Masanao; Matsuhiro, Keiji

doi:10.1115/1.2906683

Cited by 6 publications

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“…Previous references to the creep and rupture of the silicon nitride of this study can be found in the literature. [15][16][17][18][19][20][21][22][23] The data from this study are part of a much larger engineering study of the suitability of monolithic silicon nitride for gas turbine engine applications. 24…”

Section: Introductionmentioning

confidence: 99%

Tensile Creep and Rupture of Silicon Nitride

Krause

Luecke

French

et al. 1999

Journal of the American Ceramic Society

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We have characterized the tensile creep, rupture lifetime, and cavitation behavior of a commercial, gas-pressuresintered silicon nitride in the temperature range 1150°to 1400°C and stress range 70 to 400 MPa. Individual creep curves generally show primary, secondary, and tertiary creep. The majority of the primary creep is not recoverable. The best representation of the data is one where the creep rate depends exponentially on stress, rather than on the traditional power law. This representation also removes the need to break the data into high and low stress regimes. Cavitation of the interstitial silicate phase accompanies creep under all conditions, and accounts for nearly all of the measured strain. These observations are consistent with a model where creep proceeds by the redistribution of silicate phase from cavitating interstitial pockets, accommodated by grain-boundary sliding of silicon nitride.

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Section: Introductionmentioning

confidence: 99%

Tensile Creep and Rupture of Silicon Nitride

Krause

Luecke

French

et al. 1999

Journal of the American Ceramic Society

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“…The Larson-Miller parameter works well for standard metals and ceramic components, but with single growth crystal turbine blades the evaluation of creep by the above method is overly conservative (Watanabe, et al 1990). However it does provide a good starting point for creep life evaluation on advanced materials.…”

Section: ( 1 )mentioning

confidence: 99%

The Effects of Engine Degradation on Creep - Using a Transient Engine Simulation

Little

Singh

1996

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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The aero-gas turbine has undergone significant development to improve the thrust to weight ratio. These developments have increased the engine’s capability to withstand elevated temperatures which corresponds to both improved performance and increases in hot section creep. In addition, as the engine’s condition degrades over time, the gas generator’s rotational speed, free body stresses, and the hot gas temperature are further increased. To maximize the potential safe life of an engine and reduce operating costs, understanding the effects of engine component degradations on component life is essential. This paper examines the effects of engine degradation on the failure mechanism of creep, and presents a method in which the metal temperatures can be tied to transient parameters. The use of transient parameters enables engine stresses and temperatures to be determined at any operating point, which is essential for military aircraft engines.

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Finite element modelling of ceramics and glass

Mackerle

1999

Engineering Computations

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This paper gives a bibliographical review of the finite element methods (FEMs) applied to the analysis of ceramics and glass materials. The bibliography at the end of the paper contains references to papers, conference proceedings and theses/dissertations on the subject that were published between 1977-1998. The following topics are included: ceramics ± material and mechanical properties in general, ceramic coatings and joining problems, ceramic composites, ferrites, piezoceramics, ceramic tools and machining, material processing simulations, fracture mechanics and damage, applications of ceramic/composites in engineering; glass ± material and mechanical properties in general, glass fiber composites, material processing simulations, fracture mechanics and damage, and applications of glasses in engineering.The current issue and full text archive of this journal is available at http://www.emerald-library.com Finite element modelling of ceramics 527 Wade J A et al 1994 Predicting creep behaviour of silicon nitride components using finite element techniques Life Predict. Meth. Data Ceramic Mater. (ASTM) pp 360-372. Wakino K et al 1993 New equation for predicting the dielectric constant of a mixture J. Amer. Ceram. Soc. 76 2588-94. Wang Z et al 1997 Optimum design of a ceramic tensile creep specimen using a finite element method J. Res. Nat. Inst. Stand. Tech. 102 15-28. Yamabuchi T and Kagawa Y 1989 Three-dimensional finite element simulation of polarization process in electrostrictive ceramic and its effect on the vibrator characteristics Int. Conf. Syst. Simul. Sci. Comp., (Beijing: Pergamon Press) pp 977-981. Ceramic coatings and joining problems Arai Y and Kobayashi H 1993 Influence of size of joint on elastic-plastic singularity of residual stresses of ceramic-metal joints Trans. Jpn. Soc. Mech. Eng., Ser A 59 627-633. Argyris J S et al 1994 Deduction of thermal properties of plasma sprayed ceramic coatings from the microstructure Energy-Sources Tech. Conf. (New Orleans) pp 303-318. Argyris J et al 1994 Studies on ceramic coatings. Deduction of mechanical and thermal properties from the microstructure of the material Comp. Meth. Appl. Mech. Eng. 111 203-234.Bengtsson P et al 1994 The microstructure and residual stresses of thermally sprayed ceramic coatings 15th Riso Int. Symp. Mater. Sci. (Roskilde) pp 237-242. Bjorneklett A et al 1991 Thermally sprayed ceramic substrates: a thermal performance study utilizing test chips and numerical analysis Int. Electr. Packaging Conf. (San Diego) pp 176-189. Bucklow I A et al 1995 Development of a brazed ceramic-faced steel tappet TWI J. 4 258-316. Chang G C et al 1987 Behavior of thermal barrier coatings for advanced gas turbine blades Surface Coat. Tech. 30 13-28. Chung B T F et al 1985 Heat transfer in thermal barrier coated rods with circumferential and radial temperature gradients J. Eng. Gas Turbines Power, ASME 107 135-141. Chung J H 1992 Compressive mechanical behaviour of hollow ceramic spheres and bondedsphere foams PhD Thesis, Georgia Inst. of Technology. De Wees...

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Research and Development of Ceramic Turbine Wheels

Cited by 6 publications

References 0 publications

Tensile Creep and Rupture of Silicon Nitride

Tensile Creep and Rupture of Silicon Nitride

The Effects of Engine Degradation on Creep - Using a Transient Engine Simulation

Finite element modelling of ceramics and glass

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