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基岩的抗冲能力及其分类 被引量:2
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作者 刘沛清 冬俊瑞 余常昭 《长江科学院院报》 CSCD 北大核心 1996年第1期21-24,共4页
岩石河床的抗冲能力,实质上反映了基岩在挑射水流的冲击下抵抗解体破坏的能力。此文初步分析了影响基岩解体破坏的主要因素,运用量纲分析法,探讨了影响基岩抗冲能力的三个无量纲数。并在此基础上,通过综合分析各家的抗冲能力分类表... 岩石河床的抗冲能力,实质上反映了基岩在挑射水流的冲击下抵抗解体破坏的能力。此文初步分析了影响基岩解体破坏的主要因素,运用量纲分析法,探讨了影响基岩抗冲能力的三个无量纲数。并在此基础上,通过综合分析各家的抗冲能力分类表,给出一个考虑因素较多的基岩抗冲分类的推荐表。 展开更多
关键词 岩石 河床 抗冲性质 挑射水流
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Effect of CaO doping on mechanical properties and thermal shock resistance of 10NiO-NiFe_2O_4 composite ceramics 被引量:1
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作者 赖延清 张勇 +2 位作者 张刚 田忠良 李劼 《Journal of Central South University of Technology》 EI 2008年第1期25-28,共4页
The CaO doped 10NiO-NiFe2O4 composite ceramics were prepared by the cold isostatic pressing-sintering process, and the effects of CaO content on the phase composition, mechanical property and thermal shock resistance ... The CaO doped 10NiO-NiFe2O4 composite ceramics were prepared by the cold isostatic pressing-sintering process, and the effects of CaO content on the phase composition, mechanical property and thermal shock resistance of 10NiO-NiFe2O4 composite ceramics were studied. The results show that the samples mainly consist of NiO and NiFe2O4 when content of CaO is less than 4%(mass fraction), bending strength increases obviously by CaO doping. Bending strength of the samples doped with 2% CaO is above 185 MPa, but that of the samples without CaO is only 60 MPa. Fracture toughness is improved obviously by CaO doping, the samples doped with 2% CaO have the maximum fracture toughness of 2.12 MPa ·m1/2 , which is about two times of that of the undoped ceramics. CaO doping is bad to thermal shock resistance of 10NiO-NiFe2O4 composite ceramics. 展开更多
关键词 mechanical property thermal shock resistance CaO doping 10NiO-NiFe2O4 inert anode
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Talc-bearing serpentinized peridotites from the southern Mariana forearc:implications for aseismic character within subduction zones
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作者 汪小妹 曾志刚 +8 位作者 刘长华 陈俊兵 殷学博 王晓媛 陈代庚 张国良 陈帅 李康 欧阳荷根 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2009年第3期667-673,共7页
The serpentinized peridotites overlying the subducted zones in the Izu-Bonin-Mariana(IBM) arc system have been interpret as the cause of the low-velocity layer identified beneath the IBM froearc,in turn few earthquake... The serpentinized peridotites overlying the subducted zones in the Izu-Bonin-Mariana(IBM) arc system have been interpret as the cause of the low-velocity layer identified beneath the IBM froearc,in turn few earthquakes occurred along the plate boundary.Chrysotile,which is a low temperature and highly hydrated phase of serpentine with low frictional strength,has been suggested as the low velocity material in the serpentinized peridotites,besides,brucite is inferred to be likely conducive to stable sliding.However,such idea encounters challenging in our serpentinized peridotites from the southern Mariana forearc,which absent both the above minerals.The presence of talc,which characterized by its weak,low-friction and inherently stable sliding behavior,provides new clue.Here we report the occurrence of talc in serpentinized peridotites collected from the landward trench slope of the southern Mariana forearc.We infer that talc is mainly forming as a result of the reaction of serpentine minerals with silica-saturated fluids released from the subducting slab,and talc also occurs as talc veins sometimes.Due to its unique physical properties,talc may therefore play a significant role in aseismic slip in the IBM subduction zone. 展开更多
关键词 TALC serpentinized peridotites MARIANA aseismic subducfion zone
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