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2005年06月22日

【期刊论文】Thermal Shock Resistance of Ceramic/Metal Gradient Thermal Barrier Coating

肖金生, Jinsheng Xiao, Jie Liu, Wenhua Zhao and Weibiao Fu

Material.Science Forum Vols 423-425 (2003) pp, 551-554,-0001,():

-1年11月30日

摘要

The thermal shock experiment is important measure to evaluate the themal shock resis-lhcrmal shock I-csis-trance of ceramic/metal gradient thermal barrier coatings Two substrate materials and four coatingschemes were adopted to make the specimens. Before and after the thermal shock experiments, themicrostructure of specimcens was obsecrvcd. The heat transfer and the associated thermal: stresses prodtuceedin the thermal. shock procedure were simulated by finitc clement softwarc ANSYS. The simulation resultshowcd that the gradient coating scheme is much hetter than layered coating schemes andd (2Crl 3 is moresuitable than ICr18Ni9ti is substrate material. The experiment, rosults demonstrated that the largethermal shock stresses; and the large thermal stress gradient are the main reaons of erack initiation and propagation The finite elemetn.simulation agree with the theormal shock experiment results.

thermal barrier coating, thermal shock, finite element

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2005年12月20日

【期刊论文】Development of Ceramic/Metal Gradient Thermal Barrier Coating Design Software

肖金生, Jinsheng Xiao, Chunzhi Hu, Dongzhou Cui and Yunhua Guo

Material sctence forum vols 423-425 (2003) pp. 763-768,-0001,():

-1年11月30日

摘要

The Ceramic/metal gradient thermal barrier Coating Design Software (CCDS) is developed for analyzing the heat transfer and the thermal stress in the coatings, and for designing the optimal coating schemes. The CCDS is developed according to software engineering methodology with Borland C builder 5.0 and has user friendly interface. it is composed of three functional modules preproccss module and post process module.initial data are input in the preproccss module, calculation of the temperature and thermal stress is carried out in the analysis module, and visualizatin is realized by the post proccss module. Calculation is carried out by analytical method. tinite difference method and finite element method. In addition, the CCDS is enhanced by attaching an optimization design module which completes optinization design for eeramic/metal gradient thernal barrier coatings by ANSYS Parameter Design language (APDL) or genetic algorithm. and an expert system module which may propose schemes and suggestions for coating design The CCDS is useful for the design of ceramic/metal gradient thenual battier coating.

thermal barrier coating,, computer aided design,, software development

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2005年06月22日

【期刊论文】PLASMA SPRAY AND CHARACTERIZATION OF CERAMIC METAL GRADIENT THERMAL BARRIER COATING*

肖金生, J.S Xiao, C.Z. HU, W.H. Zhao and W.B Fu

,-0001,():

-1年11月30日

摘要

Four Coating schemes and two substrate materials. i.e, 2Crl3 and 1Cr18Ni9Ti, are designed to evaluate the charaecteristics of the ceramic/metal gradient thermal barrier coating. For all the coating schemes, ZrO2 is used as ceramic and NiCr/Al as bond metal. The gradient coating is successfully prepared by plasma spray with single torch and single feeder. Tje coating and thermal residual stress, The coating micro-structure is observed by scanning electron microscope (SEM). Diffractive peaks for the gradient coating are got at different zone by X-ray spectroscopy (XRS). In the thermal shock test, the microstructure of the specimens is obscrved before and after the experiment, and cracks are found in the coatin post the experimetn. The thermal shock experiment shows that the thermal shock resistance property of the gradient coating is better than that of the non-gradient coating. The measurments of thermal residual stresses in different coating schemes are carried out by hole-drilling method. the results show that compressional stress resents on 1Cr18Ni9Ti substrate and tensile stress presents on 2Crl3 substrate.

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2005年06月22日

【期刊论文】TRANSIENT THERMOMECHANICAL ANALYSIS OF LIQUEFIED PE-TROLEUM GAS VESSEL UNDER FLAME SURROUNDINS*

肖金生, J.S XIAO, Q.Z. YIN, B.YANG AND Z.L. ZHAO

,-0001,():

-1年11月30日

摘要

The themomechanical stress analysis aims at the thermal and mechanical response of LPG vessel under high thempeature environment. It includes the ealculation of temperature field and stress field of LPG vessel. The finite elements analysis software ANSYS is used to calculate the temperature field. The themal boundary conditions of LPG vessel are determined according to the heat transfer theory and calculated by the software PLGS99. The transient stress of LPG vessel includes transient thermal stress and transient mechanical stress. The thermal stress is calulated by applying thermal load, and the mechanical stress is calculated by applying pressure load of the steam in the vessel. The total stress is obtaince by adding the thermal stress and the mechanical stress. The reults show that the maximum stress in the vessel appears near the highest surface where the liquid cal reach, that the maximum cquivalent thermal stress is much larger than the maximum equivalent mechanical stress. and that the temperature gradient in longitude direction is the main reason that leads to the failure of the vessel.

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2005年06月22日

【期刊论文】质子交换膜燃料电池水、热、气管理

肖金生, 崔东周, 潘牧, 袁润章

电波,2004,34(5):374~375,-0001,():

-1年11月30日

摘要

质子交换膜燃料电池的水、热、气管理对其性能和寿命有非常重要的影响。计论了水、热、气管理的主要措施和它们对电池性能的影响。分析表明:对质子交换燃料电池物理机制认识的不足,是水、热、气管理水平较低的原因。应建立质子交换膜燃料电池的多尺度、多相、多物理场、动态仿真模型、模拟和优化,未提高其性能。

质子交换膜, 燃料电子, 水管理, 热管理, 气管理

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    武汉理工大学,湖北

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