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dc.contributor.authorLi, Siweizh_CN
dc.contributor.author李思维zh_CN
dc.contributor.authorFeng, Zudezh_CN
dc.contributor.authorMei, Hui( NW Polytech Univ, Natl Key Lab Thermostruct Composite Mat)zh_CN
dc.contributor.authorZhang, Litong( NW Polytech Univ, Natl Key Lab Thermostruct Composite Mat)zh_CN
dc.date.accessioned2011-04-26T08:04:18Z
dc.date.available2011-04-26T08:04:18Z
dc.date.issued2007-10zh_CN
dc.identifier.citationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2008,487(1-2):424-430zh_CN
dc.identifier.issn0921-5093zh_CN
dc.identifier.urihttp://dx.doi.org/doi:10.1016/j.msea.2007.10.035zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/2770
dc.description.abstractHi-Nicalon fibers were exposed in 8% O-2/78% Ar/14% H2O atmosphere for 1 h at 1300, 1400, 1500, 1600 degrees C, respectively. Residual tensile strength was evaluated by tensile test, phases in the fibers were identified using an X-ray diffractometer (XRD), morphology of the fracture surfaces and microstructure was observed by scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. Results indicated that residual tensile strength increased with increasing temperature from 1300 to 1500 degrees C, then decreased after annealing in 1600 degrees C. The grain size of beta-SiC and the amount of the stacking faults increased under the elevated temperature as well. After annealing, a passive film with a structure of alpha-cristobalite crystals dispersed in amorphous SiO2 phase formed on the fiber surface, the thickness of the film increased with the annealing temperature from 1300 to 1500 degrees C, after annealing in 1600 degrees C, fractional silica film spalled. Finally, relationship between the structural changes and the mechanical properties, the control effect of water vapor on formation and structural evolution of the passive film were discussed. (c) 2007 Elsevier B.V. All rights reserved.zh_CN
dc.language.isoenzh_CN
dc.publisherELSEVIER SCIENCE SAzh_CN
dc.subjectHi-Nicalon fiberzh_CN
dc.subjecttensile strengthzh_CN
dc.subjectpassive filmzh_CN
dc.subjectfracture surfacezh_CN
dc.subjectmicrostructurezh_CN
dc.titleMechanical and microstructural evolution of Hi-Nicalon trade mark SiC fibers annealed in O-2-H2O-Ar atmosphereszh_CN
dc.typeArticlezh_CN


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