Results 31 to 40 of about 12,470 (167)

Investigation of Microstructure, Mechanical Properties and Irradiation Behaviors of Nuclear Application Steels [PDF]

open access: yes, 2015
在核能领域应用的关键材料的服役条件非常苛刻,需要在辐照、高温、腐蚀、受应力、热循环等极端条件下长期稳定工作,并按照可预期的方式老化、失效。堆内构件的性能与特性决定了核能可以达到的安全水平。中国从美国西屋公司引进、吸收与消化AP1000核电技术,以形成具有自主知识产权的核电技术,并在此过程中着重对一系列核能关键用材料进行了相关研发。本论文以国产SA-182F304钢、304SS钢、CNST1钢、CNST2钢和CNSS3钢为研究对象,对候选钢的微观结构、微观化学、力学行为和抗辐照性能进行了详细研究 ...
陈芙梁
core  

Double‐Hollow Porous Heterostructured CoP/Cu3P Microspheres for High‐Performance Asymmetric Supercapacitors

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT CoP has become a research hotspot for supercapacitor electrode materials because of its considerable theoretical capacitance and metalloid nature, but its commercial application remains hampered by structural instability and sluggish ion kinetics.
Gaoliang Wang   +8 more
wiley   +1 more source

电子辐照原位研究超细颗粒石墨的微观结构演变

open access: yesHe jishu
石墨在熔盐堆中作为慢化剂和结构材料,长期受到高温和高通量的快中子辐照,内部产生大量点缺陷,这些缺陷会湮灭、扩散或团聚形成大的位错结构,改变石墨的微观结构,进而改变其宏观性能。然而,目前缺乏对其缺陷演化过程的统一认识。因此,研究核石墨在高温能量粒子辐照下的缺陷演化和微观结构变化具有重要意义。本文采用200 keV的电子束在室温至750 ℃下对NG-CT-50超细颗粒核石墨进行了原位电子辐照实验,在高分辨透射电子显微镜中观察其微观结构的动态变化和位错的演化过程。研究发现 ...
孙 义军, 汪 雪, 周 兴泰
doaj   +1 more source

Development and genetic mechanism of complex carbonate reservoir fractures: A case from the Zanarol Oilfield, Kazakhstan

open access: yesPetroleum Exploration and Development, 2010
By core observation and slice analysis, two types of fractures can be identified in reservoirs of Zanarol Oilfield, including macro-fractures and micro-fractures.
Zhao Lun   +5 more
doaj   +1 more source

探索物质微观结构的历史回顾——纪念夸克提出50周年 [PDF]

open access: yes, 2014
1964年盖尔曼和兹威格分别提出"基本粒子"由夸克或艾斯组成。至今,这一领域仍是粒子物理研究的前沿领域。经过50年的发展,夸克(艾斯)理论取得诸多辉煌成就 ...
刘金岩
core  

Cu‐Enhanced Medium‐Entropy TiZrCoCrMo Alloys: Balancing Superior Antibacterial and Osteogenic Properties for Orthopedic Implants

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT This study introduces novel nonequiatomic TiZrCoCrMoCux (x = 0, 5, 10; at%) medium‐entropy alloys (MEAx) tailored for orthopedic implants, synergistically combining the biocompatibility of Ti‐based alloys, the wear resistance of CoCrMo alloys, and the antibacterial/osteogenic attributes of Cu. The alloy's microstructure, mechanical properties,
Hang Yu   +9 more
wiley   +1 more source

金雀异黄素对人肝癌细胞SMMC-7721抑制作用的研究

open access: yesZhongguo shiyan zhenduanxue, 2006
目的研究金雀异黄素对人肝癌细胞SMMC-7721生长的影响。方法应用MTT法、流式细胞术和透射电镜超微结构观察分析金雀异黄素对SMMC-7721细胞生长的作用,细胞周期及形态学的影响。结果金雀异黄素明显抑制人肝癌细胞SMMC-7721的生长,G2/M期细胞增加。透射电镜超微结构观察发现金雀异黄素使肿瘤细胞超微结构改变。结论金雀异黄素可通过改变细胞的周期和超微结构而抑制人肝癌细胞生长。
田晓丰   +5 more
doaj  

Synthesis and Properties of Self-healing Polymers and Electrically Conductive Composites Based on Hydrogen-bonding [PDF]

open access: yes, 2015
通过模仿生物体自愈合的特性,人工合成可自行感知和修复损伤的聚合物材料是一项富有深远意义的研究。目前聚合物材料在加工和使用过程中容易受到各种外界因素的破坏并产生难以监测的微裂纹,而这些微裂纹正是材料性能退化的起点。作为一种新颖的智能仿生材料,自修复聚合物能够感知并修复这类损伤,避免材料受到进一步破坏,延长材料使用寿命,消除安全隐患,节约维修成本。然而,目前研究的自修复高分子材料大多为绝缘体,使得其在导电领域中的应用受到限制。随着导电高分子材料在电子器件、传感器、能源、信息、航空等领域的广泛应用 ...
谢婷婉
core  

On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong   +10 more
wiley   +1 more source

热老化对变压器绝缘纸微观结构影响的实验研究

open access: yesGaoya dianqi, 2016
为了研究热老化应力对变压器绝缘纸微观结构的影响,以更准确地分析油纸绝缘机械强度和绝缘性能,文中对油浸纸试品进行加速热老化实验,获取不同老化程度的变压器绝缘纸试样。测量了绝缘纸试样的聚合度,采用扫描电镜观察绝缘纸试样的表面微观形貌,通过傅里叶变换红外光谱(FTIR)分析纤维素分子结构变化。分析结果表明,热老化对变压器绝缘纸微观纤维结构破坏显著,纤维细化,断裂增多,纤维分子结构及相关官能团数量变化明显。
王世强   +4 more
doaj  

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