In this work, using the methods of viscosimetry and thermal analysis, the concentration changes in the values of the supercooling viscosity of Al-Mg melts with Mg content from 2.5 to 95 at.% are studied. It is shown that the temperature dependences of viscosity are well described by an exponential dependence. The concentration dependence of viscosity is not monotonous and reflects a change in the chemical short-range order in the liquid phase. The concentration dependence of supercooling of Al-Mg melts is determined by the type of solid phase formed during solidification, and also reflects the most significant changes in the chemical short-range order in the liquid phase at 20 and 80 at.% Mg. Al-Mg alloys in the concentration ranges: 0-10, 40-50 and 90-100 at.% Mg are prone to non-equilibrium crystallization, the formation of quasi-eutectics and solidification without intermediate intermetallic phases.
Melting and crystallization of Sn, Bi and Pb nanoparticles in contact with Al
研究了过冷度对Bi、Sn、Pb纳米粒子在铝基体上和铝层间结晶度的影响。它已被证明是有效的分层膜系统的使用的限制过冷度的研究中的颗粒基体系统与共晶型的相互作用之间的组分。所得结果进行了讨论,并与文献数据进行了比较。- Predstavleny rezultaty issledovanij pereohlazhdenij pri kristallizacii nanorazmernyh随机Bi,Sn i Pb na Al podlozhke i mezhdu sloyami alyuminiya. Pokazana effektivnost is polzovaniya sloistyh plenochnyh system dlya issledovaniya predelnogo pereohlazhdeniya v systemah chastica-matrica s evtekticheskim tipom vzaimodejstviya mezhdu componentami. Poluchennye rezultaty obsuzhdeny i sopostavleny s literaturnymi dannymi.
Reinvestigation of the intrinsic magnetic properties of (Fe$_{1-x}$Co$_x$)$_2$B alloys and crystallization behavior of ribbons
本文报道了(Fe $_{1-x}$ Co $_x$)$_2$ B合金单晶磁各向异性的新测定方法。用标准的Callen-Callen理论讨论了各向异性常数的反常温度依赖性,结果表明该理论不足以解释实验结果。使用第一性原理计算和无序矩方法的更具体的材料研究给出了更一致的实验数据的解释。由于与$x=0.3-0.35$的合金的内在性能是有前途的永磁体的应用,初始调查的外在性能进行了说明,特别是与Cu,Al和Ti添加的熔体旋转带的结晶。先前在该系统中开发显著滞后的尝试是不成功的。我们的熔体纺丝实验表明,该系统显示出快速结晶。
Effect of the nature of alkali and alkaline-earth oxides on the structure and crystallization of an aluminoborosilicate glass developed to immobilize highly concentrated nuclear waste solutions
Competing crystallization pathways and cold crystallization kinetics in 10OS5 liquid crystal
Institute of Nuclear Physics, Polish Academy of Sciences(波兰科学院核物理研究所);Faculty of Science, University of Siedlce(谢德尔采大学理学院);Research Center for Thermal and Entropic Science, Graduate School of Science, Osaka University(大阪大学理学研究科热与熵科学研究中心)
Effect of changing the rare earth cation type on the structure and crystallization behavior of an aluminoborosilicate glass
一种铝硼硅酸盐玻璃,含有高量的稀土(RE),其组成为50.68 SiO 2 - 4.25 Al 2 O 3 - 8.50 B 2 O 3 - 12.19 Na 2 O- 4.84 CaO - 3.19 ZrO 2 - 16.35 RE 2 O 3(重量%),目前正在研究用于固定化核废料溶液。在这项工作中,我们要调查的影响,改变稀土阳离子类型的玻璃结构和其结晶行为。为此,一系列的玻璃阐述了RE的性质是不同的镧,镥。在该玻璃系列中,仅观察到对玻璃结构的影响很小。相反,通过不同的热处理对结晶行为的强烈影响是显而易见的。以1 μ/℃/min的速度缓慢冷却熔体,发现含有离子半径接近钙的稀土的样品中磷灰石Ca_2RE_8(SiO_4)_6O_2明显结晶。另一种热处理,包括连续的成核和生长阶段,进行强制结晶的散装和减少任何表面结晶效果,提出证据的存在下,一个强烈的非均匀的第二稀土丰富的硅酸盐相的样品含有低离子半径(从Y到Lu)。
Dynamic compression of glassy GeO$2$ up to the TPa range and first observation of shock induced crystallization
European Synchrotron Radiation Facility(欧洲同步辐射装置);Politecnico di Milano(米兰理工大学);Laboratoire pour l’Utilisation des Lasers Intenses, Ecole Polytechnique, CNRS, Commissariat à l’Energie Atomique, Sorbonne Université(高强度激光利用实验室,巴黎综合理工学院,法国国家科学研究中心,法国原子能和替代能源委员会,索邦大学);CEA, DAM, DIF(法国原子能和替代能源委员会,达姆研究部,集成设施);Université Bordeaux, CNRS, CEA, CELIA, UMR 5107(波尔多大学,法国国家科学研究中心,法国原子能和替代能源委员会,CELIA联合研究单位)
A general machine learning model of aluminosilicate melt viscosity and its application to the surface properties of dry lava planets
Université Paris Cité(巴黎城市大学);Institut de physique du globe de Paris(巴黎地球物理研究所);CNRS-UMR 7154(法国国家科学研究中心-7154联合研究单位);Institut Universitaire de France(法国大学研究院);York University(约克大学);ETH Zürich(苏黎世联邦理工学院);Institute of Geochemistry and Petrology(地球化学与岩石学研究所)
Unconventional crystallization pathway bypassing the intermediate cubic phase in phase-change superlattices
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University(吉林大学电子科学与工程学院集成光电子学国家重点实验室);School of Integrated Circuits, Huazhong University of Science and Technology(华中科技大学集成电路学院);Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute(伦斯勒理工学院物理、应用物理和天文学系)