Ni-Ti-Nb合金低温力学性能及约束行为研究

SPS制备的NiTi合金的力学-微观结构关联

Mechanical-microstructural correlation on SPS-fabricated NiTi alloy

本研究针对SPS制备的NiTi合金，建立了力学性能与微观结构的关联，明确了孔隙对超弹性响应及循环失效的影响，为其工程应用提供了性能-结构关联依据。

铁电层复合材料样品畴壁贡献与介电、压电和力学性能的相互关系

Interrelation of domain wall contributions to dielectric, piezoelectric and mechanical properties of a ferroic layer composite sample

畴壁对铁电材料介电、压电和力学性能的影响是理论和实验研究的热点。最近，我们推导出了这样的贡献的理论公式，使用模型的复合层样品：中央单晶铁电-铁弹层，隔离电极的被动层。在这里，我们提出了更一般的结果，讨论的复合材料的几何和材料参数的贡献的依赖性，包括在特殊情况下固有的压电性。我们还讨论了上述相互关系，并将我们的结果与在相变下的宽温度区间内对同一RDP样品的所有贡献的测量结果进行了比较。计算结果和观测结果似乎都使人想起了所谓的Pippard-January热力学关系。

Mechanical disorder of sticky-sphere glasses. II. Thermo-mechanical inannealability

Many structural glasses feature static and dynamic mechanical properties that can depend strongly on glass formation history. The degree of universality of this history-dependence, and what it is possibly affected by, are largely unexplored. Here we show that the variability of elastic properties of simple computer glasses under thermal annealing depends strongly on the strength of attractive interactions between the glasses' constituent particles -- referred to here as glass `stickiness'. We find that in stickier glasses the stiffening of the shear modulus with thermal annealing is strongly s…

Influence of Bi addition on the property of Ag-Bi nano-composite coatings

Silver (Ag) coatings have been widely used in many industry areas due to their excellent conductivity. However, wider applications of Ag coatings have been hindered by their poor mechanical properties. In this research, to improve the mechanical performance, Ag-Bi nano-composite coatings were prepared by a novel ionic co-discharge method. A systematic study of the microstructure, mechanical properties, electrical conductivity and antibacterial behavior of the resulting coating was performed. The results indicated that after adding an appropriate amount of Bi containing solution into the Ag pla…

Non-reciprocal Radio Frequency Transduction in a Parametric Mechanical Artificial Lattice

Generating non-reciprocal radio frequency transduction plays important roles in a wide range of research and applications, and an aspiration is to integrate this functionality into micro-circuit without introducing magnetic field, which, however, remains challenging. By designing a 1D artificial lattice structure with neighbor-interaction engineered parametrically, we predicted a non-reciprocity transduction with giant unidirectionality. We then experimentally demonstrated the phenomenon on a nano-electromechanical chip fabricated by conventional complementary metal-silicon processing. A unidi…

基于DFT的二元金属二硼化物XB$_2$（X = Cr、Mo和W）物理性质的比较分析

DFT based comparative analysis of physical properties of binary metallic diborides XB$_2$ (X = Cr, Mo and W)

本文利用DFT第一性原理方法系统比较了CrB$_2$、MoB$_2$和WB$_2$的结构、力学、电子、光学及热物理性质，其中多项方向相关和热力学性质为首次研究。

Mechanical analogue of a Majorana bound state

The discovery of topologically non-trivial electronic systems has opened a new age in condensed matter research. From topological insulators to topological superconductors and Weyl semimetals, it is now understood that some of the most remarkable and robust phases in electronic systems (e.g., Quantum Hall or Anomalous Quantum Hall) are the result of topological protection. These powerful ideas have recently begun to be explored also in bosonic systems. Topologically protected acoustic, mechanical, and optical edge states have been demonstrated in a number of systems that recreate the requisite…