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| 1 | 富铁橄榄石的高温变形实验研究显示文摘利用高精度Paterson气体介质变形装置对(Mg0.5,Fe0.5)2SiO4和(Mg0.7,Fe0.3)2SiO4橄榄石集合体进行了高温三轴压缩变形试验。首先用人工合成了纯铁橄榄石Fe2SiO4,然后用合成的纯铁橄榄石与天然圣卡罗橄榄石按一定比例混合烧结合成了含铁量分别为50%和30%的富铁橄榄石集合体Fo50和Fo70。三轴压缩蠕变变形试验在温度1223-1473 K和围压 300 MPa的条件下进行,差应力为10-300 MPa,应变率为10-7-10-4s-1,每个试件的最大变形量为20%.利用三维非线性方法对蠕变数据进行拟合,得出的流动律中,Fo50应力指数为4.1,活化能为499kJ/mol;Fo70应力指数为4.3,活化能为510kJ/ mol。将实验结果与Fo90圣卡罗橄榄石集合体的强度进行对比,发现含铁量的增加使橄榄石的强度明显下降,Fo50橄榄石集合体比Fo70的粘性低一个量级,Fo70比Fo90的粘性低一个量级。从而得到了含铁量对橄榄石的粘性(强度)影响的初步试验结果。 | 赵永红 Zimmerman M Kohlstedt D L | 2005 | 岩石学报2005,21,3: | 12 |
| 2 | 压力对橄榄石流变性的影响显示文摘本文给出细粒橄榄石集合体在位错蠕变域中压力效应的实验结果。对干燥、人工合成的橄榄石集合体进行了三轴压缩实验,试验在一台高分辨率的气体介质试验机上进行。典型的常载荷蠕变试验温度为1473K或1523K,围压为400MPa、200MPa、400MPa、200MPa。当差压力和温度给定时,试件在400MPa围压下,变形速度较200MPa围压下要慢。实验得出的细粒橄榄石集合体在位错蠕变域中的活化体积值为(23±3)×10^(-6)m^3/mol。最后,对实验结果在地幔动力学中的应用进行了讨论。 | 赵永红 王中言 David F BRUHN David L KOHLSTEDT | 2003 | 岩石学报2003,19,3: | 8 |
| 3 | 橄榄石集合体扭转大变形实验研究显示文摘对(Mg_(0.5),Fe_(0.5))_2SiO_4和(Mg_(0.7)、Fe_(0.3))_2SiO_4橄榄石集合体进行了高温高压扭转大变形实验研究。试验在高精度和高分辨率 Paterson 气体介质变形试验机上进行,试验温度为1473K,围压为300MPa,应变率为10^(-4)~10^(-5)S^(-1),剪切应力为82~124MPa,剪切应变为~400%,将变形后试件沿轴向切开进行了显微结构分析,确定了不同纵截面上橄榄石的颗粒尺寸。由蠕变数据拟合出的流动律中,应力指数为与三轴压缩实验给出的应力指数吻合。利用 EBSD 方法分别对变形前后试件中橄榄石的晶格最优取向(LPO)进行了测定。在富铁橄榄石样品中观测到的最优晶格取向表明滑动属于(okl)[100]滑动系统。这个结果与 Bystricky 等人在 Fo_(90)种观测到的最优晶格取向特征是一致的。 | 赵永红 綦超 李杨 M. Zimmerman D. L. Kohlstedt | 2008 | 岩石学报2008,24,6: | 5 |
| 4 | Solid-state reaction between titanium carbide and titanium metal 显示文摘 | Quinn C J Kohlstedt D L | 1984 | J Am Ceram Soc1984,67,5: | 2 |
| 5 | Experimental Investigation of the Creep Behavior of Garnet at High Temperatures and Pressures显示文摘To provide constraints on the rheological properties of garnet, we have experimentally investigated the creep behavior of garnet at high pressures and temperatures using a deformation-DIA. Samples were cold-pressed from a garnet powder and deformed at constant displacement rates ranging from 1.1×10-5 to 2.6×10-5 s-1 at high temperatures (1 273–1 473 K) and high pressures (2.4–4.1 GPa). Differential stress and pressure were measured using X-ray diffraction techniques based on the elastic strain of various lattice planes as a function of orientation with respect to the applied stress field. The plastic strain of a deforming sample was monitored in-situ through a series of radiographs. Our results provide a measure of the dependence of creep rate of garnet on the temperature with an activation en-ergy of ~280 kJ/mol and on pressure with an activation volume of ~10×10-6 m3/mol. The flow behavior of garnet quantified by this study provides the basis for modeling geodynamic processes occurring within subducted lithosphere. | Shenghua Mei Ayako M Suzuki David L Kohlstedt 许丽丽 | 2010 | Journal of Earth Science2010,21,5: | 2 |
| 6 | 橄榄石集合体中与位错蠕变相伴随的粒间滑动显示文摘为了研究橄榄岩位错蠕变过程中粒间滑动所起的作用,对经脱水干燥的橄榄石集合体试件进行了一系列的变形试验。三轴压缩蠕变试验在T=1473K、P=200和400MPa条件下使用一台高分辨率气体介质变形装置进行,每个试件在介于100~250MPa之间的不同应力水平下变形,得到的应变率介于10^(-4)~10^(-6)S^(-1)之间。随着差应力的增加,得到扩散蠕变到位错蠕变的过渡,在位错蠕变域,易滑动体系在~50MPa和颗粒尺寸为15μm时伴随粒间滑动。这一粒径敏感蠕变域由应力指数3.2±0.1和粒径指数1.8±0.2来刻划。将这一流动律与其他扩散和位错蠕变结果进行对比,表明本文得出的流动律可应用于粒度小于100μm和差应力大于20MPa时的岩石流动。因此,与粒间滑动相伴的位错蠕变可能是上地幔岩石圈剪切带变形局部化的主要变形机制。 | 赵永红 王中言 David L KOHLSTEDT | 2009 | 岩石学报2009,25,3: | 2 |
| 7 | 显示文摘 | Contreras J R Kohlstedt H | 2003 | Appl Phys Lett2003,83,: | 1 |
| 8 | Signaling via the angiotensin-converting enzyme enhances the expression of cyclooxygenase-2 in endothelial cells 显示文摘 | Kohlstedt K Busse R Fleming I | 2005 | Hypertension2005,45,1: | 1 |
| 9 | Systems metabolic engineering of Corynebacterium glutamicum for production of the chemical chaperone ectoine 显示文摘 | Becker J Sch?fer R Kohlstedt M | 2013 | Microbial Cell Factories2013,12,1: | 1 |
| 10 | The tissue renin-angiotensin system and intracellular signalling显示文摘 | Fleming I Kohlstedt K Busse R | 2006 | Curr Opin Nephrol Hypertens2006,25,15: | 1 |
| 11 | Solubility of water in the a ,p and 7 phases of(Mg, Fe)2SiO4 显示文摘 | Kohlstedt D L Keppler H Rubie D C | 1996 | Contributions to Mineralogy and Petrology1996,123,4: | 1 |
| 12 | 显示文摘 | Kohlstedt H Mustafa Y Gerber A | 2005 | Microelectronic Engineering2005,80,: | 1 |
| 13 | Solubility of water in the in the a,fl and y phases of (Mg,Fe)2SiO4 显示文摘 | Kohlstedt D L Keppler H Rubie D C | 1996 | Contrib Mineral Petrol1996,123,4: | 1 |
| 14 | High-temperature creep of olivine single crystals,2, dislocation structures 显示文摘 | Kohlstedt D L | 1992 | Tectonophysics1992,2061,29: | 1 |
| 15 | Rheology of partially molten mantle roeks显示文摘 | Kohlstedt D L Zimmerman M E | 1996 | Annu Rev Earth Planet Sci1996,2,: | 1 |
| 16 | Limits on lithospheric stress imposed by laboratory experiments显示文摘 | Brace W F Kohlstedt D L | 1980 | Journal of Geophysical Research1980,85,: | 1 |
| 17 | Tunneling across a ferroelec- tric显示文摘 | Tsymbal E Y Kohlstedt H | 2006 | Science2006,313,: | 1 |
| 18 | Experimental constrains on the dynamics of the partially melten upper mantle:deformation in the diffusion creep regime显示文摘 | Hirth G Kohlstedt D L | 1995 | Journal of Geophysical Research1995,100,: | 1 |
| 19 | Tunneling across a fer- roeleetric 显示文摘 | TSYMBAL E Y KOHLSTEDT H | | Science0,313,5784: | 1 |
| 20 | Experimental constraints on the dynamics of the partially molten upper mantle: deformation in the diffusion creep regime显示文摘 | Kohlstedt D L | 1995 | J Geophys Res1995,10,01: | 1 |