Results 21 to 30 of about 1,831,457 (154)
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Al‐based neutron shielding materials suffer from poor laser powder bed fusion (LPBF) processibility, hindering their simultaneous achievement of good printability and exceptional mechanical properties. In this work, the newly developed rare‐earth Al alloy (i.e., Al‐6Mg‐5Gd) was processed by LPBF technique to meet the printability, mechanical ...
Chen Yang +8 more
wiley +1 more source
, 2016 现有的研究表明,直径10微米量级的夹杂是高强钢超高周疲劳裂纹起源的主要诱因之一。在实际应用中,加工以及磨损造成的微小表面缺陷,其尺寸往往达到或超过这一量级,即构件表面缺陷对疲劳裂纹萌生和疲劳寿命将有显著影响。因此,研究表面微小缺陷对高强钢超高周疲劳的影响具有重要的意义。本文对一种高强度车轴钢进行了超高周疲劳实验研究,通过显微硬度计压坑法和钻孔的方法在试样表面引入了不同的表面缺陷。实验结果表明,小于一定尺寸的缺陷一般不会引起裂纹起源,但是会降低试样的疲劳强度;而表面缺陷的尺寸较大时,裂纹往往由缺陷处起源 ...
孙成奇 +3 more
core +2 more sources
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Te‐free BiSbSe3 is a promising medium‐temperature thermoelectric (TE) material owing to its cost‐effectiveness and intrinsically low lattice thermal conductivity. However, its comparatively low electrical conductivity has severely hindered the optimization of TE performance.
Xiaowei Shi +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Refractory high‐entropy alloys (RHEAs) face severe oxidation challenges at elevated temperatures, despite their outstanding mechanical properties. Consequently, understanding the oxidation mechanisms of RHEAs is crucial for their high‐temperature applications.
Zheng Tian +7 more
wiley +1 more source
, 2007 缺陷型内包层双包层光纤由于其特殊的内包层横截面结构,对于光波的吸收效率要比理想圆型内包层双包层光纤提高许多。由于射线法在分析光波在光纤中的场分布、传播功率等情况时有其局限性,因此,文章改用波动理论对缺陷型内包层双包层光纤进行分析 ...
何伟, 王子华
core +1 more source
, 2022 本发明提供一种基于声学频谱分析物体内部缺陷的检测仪，包括壳体，在壳体内安装有：电机；敲击锤，设置在壳体外部；声纳装置，设置在敲击锤的四周，用于收集敲击锤的敲打声音；偏心驱动装置，使敲击锤实现间歇性敲打动作；分析系统，通过位移传感器获取敲击锤的敲击路线，同时通过线缆连接声纳装置以获取声音频率，进行粗略和精确分析后，综合确定出现的空鼓位置及尺寸。本发明能够解决饰面层粘贴质量检测过程中操作复杂，劳动强度大等问题，只需控制检测仪按一定轨迹进行移动，敲击锤就会在移动过程中以固定的敲击频率和力敲击瓷砖表面 ...
陈雪 +5 more
core +2 more sources
Overreliance on Orthographic Similarity in L2‐Japanese Conceptual Processing by L1‐Chinese Learners
International Journal of Applied Linguistics, Volume 36, Issue 2, Page 1807-1820, May 2026.ABSTRACT Orthographic and phonological similarities between first (L1) and second (L2) languages can facilitate L2 processing. Particularly, L1‐Chinese learners of L2‐Japanese can benefit from the shared morphosyllabic Chinese characters (Japanese kanji/Chinese hanzi) because of their similar orthographies.
Xuehan Zhao, Kexin Xiong, Sachiko Kiyama
wiley +1 more source
Gaoya dianqi, 2019 SF6气体绝缘全封闭组合电器（GIS）内部可能出现金属微粒等异物缺陷导致故障,因此对GIS设备内部的异物缺陷故障进行检测具有重要的意义。X射线成像法是一种检测GIS设备内部缺陷的有效方法,但缺乏成熟的参数选择方法。文中对X射线检测的基本理论进行了介绍,对GIS设备X射线检测参数选择方法进行了讨论,并为220kV GIS设备内异物缺陷检测选择了合适的参数。在选定参数下,使用双丝像质计对射线成像系统的不清晰度进行了研究,验证了X射线对金属微粒缺陷检测的可行性 ...
周艺环 +5 more
doaj
Gaoya dianqi, 2021 利用特高频局部放电检测方法及时发现并处理气体绝缘金属封闭开关设备（GIS）内部固体绝缘缺陷,是GIS设备运维的重要手段。目前将异常特高频信号与现行标准、规范和典型模拟缺陷图谱进行比对从而诊断缺陷类型及严重程度的方法,因现场情况复杂、设备结构各异,准确性有待进一步提升。因此文中针对现场检测中发现的GIS固体绝缘表面放电缺陷和内部气隙放电缺陷,研究该类缺陷所激发特高频局部放电信号的PRPS统计图谱特征,并利用傅里叶变换和连续小波变换分析单次特高频原始脉冲的频谱特征和时频特征 ...
周电波 +6 more
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
wiley +1 more source