Results 21 to 30 of about 12,470 (167)
The Microstructure Evolution and Mechanical Properties of (FeCoCrNi)100‐x(AlCu)x High‐Entropy Alloys
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT This study systematically investigates the effects of AlCu addition on the microstructural evolution and mechanical properties of (FeCoCrNi)100‐x(AlCu)x (x = 0, 5, 10, 15, 20; at%) high‐entropy alloys (HEAs). The results reveal that the microstructure evolves from coarse equiaxed to refined equiaxed, dendritic, and ultimately dual‐phase ...
Shunfu Xie +7 more
wiley +1 more source
Dianci bileiqi, 2015 选取国内两种有代表性的高压电瓷样品,用XRD、SEM、EDS等手段观察其微观结构,并测试相关性能,从宏观性能与微观结构的角度进行了分析比较,探讨了微观结构的形成机理及与宏观性能的有机关联,并为提高高压电瓷性能提供理论依据与指导。
马丛丛 +4 more
doaj
A MRI study of white matter changes in mesial temporal lobe epilepsy patients [PDF]
, 2015 目的 运用基于体素的形态学测量（voxel-basedmorphometry,VBM）及基于纤维束骨架的空间统计方法（tract-basedspatialstatistics,TBSS）对内侧颞叶癫痫（mesialtemporallobeepilepsy,MTLE）患者全脑白质体积和白质纤维束弥散张量成像(diffusiontensorimaging,DTI)参数进行分析，并探讨MTLE患者脑白质结构改变与认知水平的关系。 材料和方法 选取24例右利手MTLE患者，其中左侧MTLE12例 ...
席继辉
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Implications of the Pragmatic Presentation in English Learner’s Dictionaries to the Revision of The Contemporary Chinese Dictionary ( Chinese English Edition 2002) [PDF]
, 2016 语用学作为语言学的后起之秀，对英语学习词典的编纂起到了重要作用。最近几十年，语用学在中国得到了快速发展，许多词典编纂研究者积极探讨语用学理论对词典编纂的应用。遗憾的是，语用学的研究存在理论引进和实践脱节的现象。2002年，《现代汉语词典》双解版问世，为汉语在全世界进一步推广起到了重要作用。十几年过去，随着孔子学院在全世界范围扎根，对外汉语开展得如火如荼，《现代汉语词典》双解版原有的语用信息量和呈现方式却远远无法满足时下汉语非母语学习者的需求。为丰富《现代汉语词典》双解版中的语用信息的内容和呈现方式 ...
薛文娟
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Internal oxidation has been identified as an effective method for enhancing the strength of AgMg alloys. However, the concurrent occurrence of embrittlement remains inadequately understood, thus limiting their broader application. This study investigates the oxidation behavior of AgMg alloys with Mg concentrations ranging from 1 at% to 7 at ...
Hai‐Cheng Zhu +12 more
wiley +1 more source
Synthesis and properties of YAG:Ce3+ and YAGG:Ce3+ phosphors and transparent ceramics [PDF]
, 2016 由于白光LED具有高效、环保、寿命长等优异性能，其被认为是继白炽灯和荧光灯之后的下一代照明光源。在白光LED中，荧光材料起着光转换的作用，是一种非常关键的材料。本论文针对YAG:Ce3+荧光粉、YAG:Ce3+透明陶瓷以及YAGG:Ce3+荧光材料进行了制备和发光性能方面的研究，具体内容如下： （1）分别以CeF3和CeO2为铈源，采用固相反应制备了一系列YAG:Ce3+荧光粉。以CeF3为铈源在1350℃就能制备出纯相YAG:CeF3荧光粉，而以CeO2为铈源则需要在1450℃才能制备出纯相YAG ...
强耀春
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT This study elucidates the oxidation mechanisms governing Y/Hf‐doped AlCoCrFeNiTi high‐entropy alloys (HEAs) and reveals the pivotal role of fabrication processes in dictating high‐temperature oxidation behavior. We demonstrate that casting and spark plasma sintering (SPS) promote Y/Hf segregation, resulting in heterogeneous oxide formation and
Huaqing Yi +5 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2003 采用扫描电镜技术,观察了赤链华游蛇消化道粘膜上皮表面细微结构的特征.结果表明,其食道前段粘膜上皮由纤毛细胞、柱状细胞组成,后段为假复层上皮细胞组成;胃粘膜上皮为单层柱状细胞,细胞表面无微绒毛;肠粘膜上皮细胞表面有微绒毛;同时,还讨论了这些结构与机能的关系.
LIZhong-jie(李仲杰) +2 more
doaj +1 more source