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学科主题: Materials Science, Ceramics
题名: Mechanical and microstructural characterization of calcium aluminosilicate (CAS) andSiO(2)/CAS composites deformed at high temperature and high pressure
作者: Ji, SC ; Rybacki, E ; Wirth, R ; Jiang, ZT ; Xia, B
通讯作者: sji@polymtl.ca
关键词: composites ; mechanical properties ; hot isostatic pressing ; plasticity ; anorthite ; SiO2
刊名: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
发表日期: 2005
卷: 25, 期:4, 页:301-311
收录类别: sci
部门归属: Ecole Polytech, Dept Genies Civil Geol & Mines, Montreal, PQ H3C 3A7, Canada; Geoforschungszentrum Potsdam, D-14473 Potsdam, Germany; Univ Liverpool, Dept Earth Sci, Liverpool L69 3BX, Merseyside, England; Chinese Acad Sci, Guangzhou Inst Geochem, Lab Marginal Sea Geol, Guangzhou 510640, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanog, Guangzhou 510640, Peoples R China
项目归属: 海洋地质
摘要: We performed axial compression experiments on polycrystalline calcium aluminosilicate (CAS or anorthite) and on particulate and layered composites with equal volume fractions of CAS and SiO2 (quartz) at a confining pressure of 300 MPa, temperatures of 1173-1473 K, and strain rates of 10(-5) to 10(-4) s(-1). The dense samples were fabricated from quartz crystalline and CAS glass powders by hot isostatic pressing (HIP). Under the experimental conditions, triclinic CAS, regardless in monolithic aggregates or composites, deforms by dislocation creep as indicated by TEM microstructures, intensive grain boundary migration recrystallization and strong crystallographic preferred orientation (CPO). Dislocation creep of CAS is characterized by dominant glide on a single slip system (010)[100] while mechanical twinning, anisotropic growth and recrystallization play an role to relieve the strain incompatibilities which would otherwise result from such limited slip systems. Particulate and particularly layered composites are significantly stronger than monolithic CAS aggregates, indicating that quartz is an effective reinforcement to the CAS matrix even when the material is used at high temperature and high pressure. Under layer-normal compression, the flow strength of layered composites increases remarkably with decreasing the thickness of the layers, and the thin-layered composites are significantly stronger than particulate counterparts with the same composition. The observed layering-induced stiffening is due to constraint effects of rigid quartz on plastic flow of CAS. (C) 2004 Elsevier Ltd. All rights reserved.
WOS记录号: WOS:000226924100002
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4882
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Ji, SC; Rybacki, E; Wirth, R; Jiang, ZT; Xia, B.Mechanical and microstructural characterization of calcium aluminosilicate (CAS) andSiO(2)/CAS composites deformed at high temperature and high pressure,JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2005,25(4):301-311
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