In situ observation of a phase transition in silicon carbide under shock compression using pulsed x-ray diffraction

Tracy S. J.; Smith R. F.; Wicks J. K.; Fratanduono D. E.; Gleason A. E.; Bolme C. A.; Prakapenka V. B.; Speziale S.; Appel K.; Fernandez-Panella A.; Lee H. J.; MacKinnon A.; Tavella I. F.; Eggert J. H.; Duffy T. S.

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In situ observation of a phase transition in silicon carbide under shock compression using pulsed x-ray diffraction

机译：用脉冲X射线衍射在冲击压缩下对碳化硅中碳化硅中相转变的原位观察

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The behavior of silicon carbide (SiC) under shock compression is of interest due to its applications as a high-strength ceramic and for general understanding of shock-induced polymorphism. Here we use the Matter in Extreme Conditions beamline of the Linac Coherent Light Source to carry out a series of time-resolved pump-probe x-ray diffraction measurements on SiC laser-shocked to as high as 206 GPa. Experiments on single crystals and polycrystals of different polytypes show a transformation from a low-pressure tetrahedral phase to the high-pressure rocksalt-type (B1) structure. We directly observe coexistence of the low- and high-pressure phases in a mixed-phase region and complete transformation to the B1 phase above 200 GPa. The densities measured by x-ray diffraction are in agreement with both continuum gas-gun studies and a theoretical B1 Hugoniot derived from static-compression data. Time-resolved measurements during shock loading and release reveal a large hysteresis upon unloading, with the B1 phase retained to as low as 5 GPa. The sample eventually reverts to a mixture of polytypes of the low-pressure phase at late times. Our study demonstrates that x-ray diffraction is an effective means to characterize the time-dependent structural response of materials undergoing shock-induced phase transformations at megabar pressures.

机译：由于其应用作为一种高强度陶瓷和对抗诱导多态性的一般理解，抗困难碳化硅（SiC）的行为是感兴趣的。在这里，我们在LinaC相干光源的极端条件下使用此问题，用于在SiC激光震动到高达206GPa的一系列时间分辨泵探针X射线衍射测量。不同聚晶体的单晶和多晶体的实验显示了从低压四面体相到高压岩土型（B1）结构的转化。我们直接观察混合相区域中的低压和高压相的共存，并完全转化为200GPa以上的B1相。通过X射线衍射测量的密度与连续垃圾研究和衍生自静压数据的理论B1 Hugoniot一致。在冲击载荷期间的时间分辨测量和释放在卸载时显示出大的滞后，B1相保留为低至5GPa。样品最终恢复到晚期低压阶段的多型混合物。我们的研究表明，X射线衍射是表征在兆瓦压力下发生冲击诱导的相变的时间依赖性结构响应的有效手段。

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《Physical review》 |2019年第21期|214106.1-214106.7|共7页
作者
Tracy S. J.; Smith R. F.; Wicks J. K.; Fratanduono D. E.; Gleason A. E.; Bolme C. A.; Prakapenka V. B.; Speziale S.; Appel K.; Fernandez-Panella A.; Lee H. J.; MacKinnon A.; Tavella I. F.; Eggert J. H.; Duffy T. S.;
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Princeton Univ Dept Geosci Princeton NJ 08544 USA|Carnegie Inst Sci Geophys Lab Washington DC 20015 USA;

Lawrence Livermore Natl Lab Livermore CA 94550 USA;

Princeton Univ Dept Geosci Princeton NJ 08544 USA|Johns Hopkins Univ Dept Earth & Planetary Sci Baltimore MD 21218 USA;

Lawrence Livermore Natl Lab Livermore CA 94550 USA;

SLAC Natl Accelerator Lab Stanford Inst Mat & Energy Sci Menlo Pk CA 94025 USA;

Los Alamos Natl Lab Shock & Detonat Phys Los Alamos NM 87545 USA;

Univ Chicago Argonne Natl Lab GeoSoilEnviroCARS Argonne IL 60439 USA;

GFZ German Res Ctr Geosci D-14473 Potsdam Germany;

European XFEL GmbH Holzkoppel 4 D-22869 Schenefeld Germany;

Lawrence Livermore Natl Lab Livermore CA 94550 USA;

SLAC Natl Accelerator Lab Linac Coherent Light Source Menlo Pk CA 94025 USA;

SLAC Natl Accelerator Lab Linac Coherent Light Source Menlo Pk CA 94025 USA|Livermore Natl Lab Livermore CA 94550 USA;

SLAC Natl Accelerator Lab Linac Coherent Light Source Menlo Pk CA 94025 USA;

Lawrence Livermore Natl Lab Livermore CA 94550 USA;

Princeton Univ Dept Geosci Princeton NJ 08544 USA;

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1. In situ observation of a phase transition in silicon carbide under shock compression using pulsed x-ray diffraction [J] . Tracy S. J., Smith R. F., Wicks J. K., Physical review . 2019,第21期

机译：使用脉冲X射线衍射对碳化硅在冲击压缩下的相变进行原位观察
2. In situ observation of a phase transition in silicon carbide under shock compression using pulsed x-ray diffraction [J] . Tracy S. J., Smith R. F., Wicks J. K., Physical review, B . 2019,第21期

机译：用脉冲X射线衍射在冲击压缩下对碳化硅中碳化硅中相转变的原位观察
3. Investigation of the transition phases from amorphous silicon-based multilayers to silicon nanostructures by in situ X-ray diffraction [J] . Solomon Agbo, Pavel Calta, Pavol Sutta, Physica status solidi . 2014,第7期

机译：通过原位X射线衍射研究从非晶硅基多层到硅纳米结构的过渡相
4. In-Situ observation of the oxygen nucleation in silicon with X-Ray single crystal diffraction [C] . Johannes Will, Alexander Groeschel, Christoph Bergmann, Gettering and defect engineering in semiconductor technology XIV . 2011

机译：X射线单晶衍射法原位观察硅中氧的形核
5. Fabrication of silicon nitride ceramics by dispersing in situ formed nano silicon carbide phase. [D] . Yanai, Tomohiro. 1995

机译：通过分散原位形成的纳米碳化硅相来制造氮化硅陶瓷。
6. In Situ Observations of Phase Transitions in MetastableNickel (Carbide)/Carbon Nanocomposites [O] . Bernhard C. Bayer, *, David A. Bosworth, -1

机译：亚稳态相变的原位观察镍（碳化物）/碳纳米复合材料
7. In situ observation of a phase transition in silicon carbide under shock compression using pulsed x-ray diffraction [O] . S. J. Tracy, R. F. Smith, J. K. Wicks, 2019

机译：用脉冲X射线衍射在冲击压缩下对碳化硅中碳化硅中相转变的原位观察

In situ observation of a phase transition in silicon carbide under shock compression using pulsed x-ray diffraction

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