Results 11 to 20 of about 271,926 (150)
, 2016 本工作采用NPT系综下的分子动力学模拟[1]研究了Hertzian软球[2]的结晶过程。我们观察到,是键取向有序性(序参数Q[6)3]而不是平移有序性(数密度)在结晶过程中起主导作用。结晶形成的晶型由所处的状态点决定。当过冷度较小(温度较高)时,体系趋于结晶成核形成亚稳态的bcc占优势的结构,这可以视为Alexander-Mc Tague机制[4]在起作用。反之,当过冷度较大(温度较低)时,在小的晶核中发现fcc结构占优势。前驱体作为晶体形成的前期相对较有序结构[5],附着在晶核的外围 ...
徐升华, 欧阳文泽, 孙祉伟
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Lightweight refractory medium‐entropy alloys (LRMEAs) are promising for high‐temperature structural applications, yet achieving a robust strength‐ductility balance across a wide temperature range remains challenging. We report a Ti50Al16.7Nb16.6V16.7 (at.%) LRMEA featuring a BCC matrix reinforced by nano B2‐ordered domains, exhibiting ...
Minghui Li +10 more
wiley +1 more source
Gongye shui chuli, 2000 用加晶种于过饱和溶液中的方法测定了CaCO3晶体结晶生长的动力学过程,得到了不加阻垢剂及加阻垢剂两种条件下的结晶生长反应速率常数。结果表明,PBTCA及同济大学测试中心研制的丙烯酸马来酸共聚物(AA—MA)能明显地阻止溶液中CaCO3在晶种表面的结晶生长,研究发现,阻垢的机理主要是阻垢剂对CaCO3晶种表面具有吸附作用,从而抑制了CaCO3的结晶生长,这种吸附作用符合Langmuir等温吸附特征,并且CaCO3晶体对PBTCA的吸附属于单分子化学吸附,PBTCA吸附于微晶表面的活性增长点。
朱志良 +3 more
doaj +2 more sources
, 1999 采用Hopkinson杆加载技术和帽状试样，研究Monel合金在ε↑._s≈4.3×10~5s~(-1)的高应变速率条件下的应力－应变关系及塑性变形行为。实验及计算结果表明，塑性区（简称剪切带）内温度随剪切应变增加呈线性升高。透射电镜证实剪切带组织发生了动态再结晶，再结晶晶粒约为170nm。分析了剪切带中组织结构的演变过程 ...
李强 +4 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Additive manufacturing of zinc‐magnesium (Zn‐Mg) alloys via laser powder bed fusion (LPBF) has gained significant recognition as a promising candidate for bone repair. However, the presence of coarse yet brittle eutectic phases in the fabricated Zn‐Mg alloys tends to induce premature stress concentration and resultant fracture during ...
Zhi Dong +10 more
wiley +1 more source
The Evolution of Metal Halide Perovskite Transistors
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Metal halide perovskites (MHPs) offer a revolutionary pathway for next‐generation field‐effect transistors (FETs) because of their exceptional carrier mobilities and cost‐effective processability. However, their transition to practical electronics is significantly challenged by intrinsic instability and imbalanced charge transport. This review
Jiangnan Xia +8 more
wiley +1 more source
Gongye shui chuli, 2022 电化学诱导循环水系统中的Ca2+在阴极板上以CaCO3的形式沉积，表现出良好的水软化效果。开展阴极板上CaCO3结晶行为的研究有助于提高水软化效率。为探究极板结构和电场形式对CaCO3结晶行为的影响，采用7种不同结构的阴极，分别研究脉冲电场和直流电场中CaCO3的结晶行为。从宏观角度分析不同电场形式下各阴极表面的CaCO3结晶速率，从微观角度分析各阴极表面的CaCO3结晶性质。用高倍光学显微镜对CaCO3显微结构进行表征，通过X-射线衍射仪（XRD）对CaCO3结晶成分进行分析。实验结果表明 ...
林纬 +6 more
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Dianci bileiqi, 1992 重结晶碳化硅的岩相鉴定,可以磨制光片通过反光显微镜进行。每组试样磨制2个光片,其中一个光片毋需经过腐蚀,可直接用来观察气孔的分布、大小、形状与数量等,据此可了解到烧结体的致密度、吸水率等情况;另一个光片经过腐蚀后,可观察烧结体的结晶类型、大小、分布、再结晶圈（晶须）的发育状况、强化再结晶的分布及其影响性能的内在因素——重结晶碳化硅的内部结构。
张玉容
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Aqueous zinc batteries hold great promise for large‐scale energy storage, yet their practical application is hindered by dendrite growth and interfacial side reactions on the zinc anode. Inspired by the industrially mature chromate passivation technology, this work reports an in situ construction of a chromium‐rich passivation layer (Zn@Cr) on
Long Huang +9 more
wiley +1 more source
Gongye shui chuli, 2000 用加晶种于过饱和溶液中的方法测定了CaSO4·2H2O晶体结晶生长的动力学过程 ,得到了不加阻垢剂及加阻垢剂两种条件下的结晶生长反应速率常数。结果表明 ,阻垢剂聚丙烯酸及马丙共聚物能明显地阻止溶液中CaSO4 在晶种表面的结晶生长 ,研究发现 ,阻垢的机理主要是阻垢剂对CaSO4·2H2O晶种表面具有吸附作用 ,从而抑制了CaSO4·2H2O的结晶生长 ,实验还证明了这种吸附作用符合Langmuir等温吸附特征 ,CaSO4·2H2O晶体对阻垢剂的吸附属于单分子化学吸附 ...
朱志良 +3 more
doaj +2 more sources