Results 21 to 30 of about 271,926 (150)

硬脂烷醇与米糠蜡配比对葵花籽油凝胶微观结构 及结晶行为的影响Effects of ratio of stearyl alcohol to rice bran wax on the microstructure and crystallization behavior of sunflower seed oil oleogels

Zhongguo youzhi, 2023
为探究硬脂烷醇（SA）和米糠蜡（RW）在油凝胶中的相互作用机制，以不同配比的SA和RW为凝胶剂制备了葵花籽油凝胶，采用差示扫描量热仪（DSC）、低场核磁共振仪和偏光显微镜（PLM）探究不同SA与RW配比对油凝胶热性质、微观结构形态和结晶行为的影响。结果发现：不同油凝胶的固体脂肪含量（SFC）随温度的升高出现二次降低现象；随着SA和RW配比的变化，SA和RW在体系中按熔点高低顺序结晶，在结晶过程中出现共晶现象；RW油凝胶的晶体为棒状或针状结构，SA油凝胶的晶体为片状结构，当SA在凝胶剂中占比增加时 ...
武永恒，杨国龙，孟鹏程，刘伟 WU Yongheng, YANG Guolong, MENG Pengcheng, LIU Wei
doaj   +1 more source

Uncovering Cu Involved Nanophase Structures and Transformation in a Novel 7075B Aluminum Alloy

Rare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT In this study, aberration‐corrected transmission electron microscopy combined with first‐principles calculations was employed to systematically investigate the Cu‐involved crystal structures and evolution mechanisms of nanoprecipitates in a novel 7075B Al alloy. Firstly, an atomic model of the early‐stage GP‐ηp structure together with specific
Deyu Zhang, Caixia Long, Yongjie Zhu, Yuanyang Fu, Jin Wu, Zihao Li, Jiashen Tang, Qingqing Wen, Bin Wang, Xiaofei Sun, Zheng Wang, Shihao Wang, Zulai Li, Shuangbao Wang   +13 more
wiley   +1 more source

电子辐照对纳米Gd₂Zr₂O₇晶粒尺寸和结晶度的影响

四川大学学报. 自然科学版, 2014
利用能量为1.7Mev、注量在1015～2×1016/cm2的电子辐照非晶Gd2Zr2O7粉体、晶态Gd2Zr2O7纳米粉体和晶态Gd2Zr2O7纳米陶瓷,采用XRD测试手段对电子辐照前后的样品进行分析.结果表明,在此电子能量下,非晶Gd2Zr2O7粉体未出现晶化现象;部分晶态Gd2Zr2O7纳米粉体和纳米陶瓷在1016/cm2的注量下,结晶度提高,晶粒长大,辐照引起的退火效应占主导地位;结晶程度较高的Gd2Zr2O7纳米陶瓷在电子辐照下结晶度提高最大,平均晶粒尺寸也有明显提高.
周莉, 卢铁城, 伍登学, 刘方明
doaj  

Time‐Efficient Columnar‐to‐Equiaxed Transition via High Magnetic Field Processing

Rare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT The need to simplify processing routes and improve processing efficiency motivates the development of time‐efficient methods for inducing the columnar‐to‐equiaxed transition (CET) during solidification while tailoring material performance. Conventional multistep CET approaches are time‐consuming and often struggle to simultaneously regulate ...
Chendong Zhao, Jun Wang, Yujie Yan, Dou Li, Bijun Tang, Ruihuan Duan, Qingfeng Wu, Zhijun Wang, Tie Liu, Qiang Wang, William Yi Wang, Jinshan Li, Zheng Liu   +12 more
wiley   +1 more source

聚2.6萘二甲酸乙二酯结晶动力学的研究

四川大学学报. 自然科学版, 1985
用反相色谱法研究了聚2.6萘二甲酸乙二酯在高温区（233,5—246℃）和低温区（142—156℃）的结晶动力学,得到了半结晶时间、结晶速率常数以及Avrami指数.测定了聚2.6萘二甲酸乙二酯的晶片折迭表面自由能δe;计算了结晶动力学方程中的前置指数Gο,初步得出聚2.6萘二甲酸乙二酯的结晶速率比一般高分子慢.
陈德本, 余自力, 许苏林
doaj  

Synchronous Ultrasonic Impact Treatment for Regulating Microstructure and Properties of Laser‐Directed Energy Deposited In Situ TiC/Ti6Al4V Composites

Rare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT In laser‐directed energy deposition (LDED) of TiC/Ti6Al4V composites, a low content of micron‐sized TiC provides a good strengthening effect on hardness and strength, but the improvement in plasticity remains a challenge. By introducing synchronous ultrasonic impact treatment (UIT) into the LDED process, an ultrasonic‐assisted LDED (UA‐LDED ...
Yuzhou Zeng, Jiandong Wang, Weiming Cui, Qiheng Bai, Chenxinwei Wang, Xu Li, Chengbo Pan, Yunxiang Tong, Liqun Li, Peng He   +9 more
wiley   +1 more source

Unveiling Entropy‐Driven Hard‐Tough Synergy Mechanisms in High‐Entropy Carbonitride Ceramics

Rare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT High‐entropy ceramics manifested promise for extreme environments, yet their phase stability and mechanical synergy mechanisms remain elusive. Herein, entropy‐difference carbonitrides, including (TaTiV)CN, (TaTiVNb)CN, and (TaTiVNbHf)CN, were designed and consolidated via spark plasma sintering.
Long Zhao, Jialin Sun, Xiao Li, Chengqiang Fan, Zhaozhen Li, Linghang Zhu, Jun Zhao   +6 more
wiley   +1 more source

Mesoporous Hexametallic High‐Entropy Alloy Nanotubes With Multicomponent Electronic Modulation for Efficient Bifunctional Catalysis

Rare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT Platinum‐based electrocatalysts are fundamentally constrained by strong oxygen binding, which restricts the oxygen reduction reaction (ORR) kinetics, and by severe CO poisoning, which hinders the methanol oxidation reaction (MOR). To address these limitations, we synthesized PdPtRuIrRhNi high‐entropy alloy (HEA) mesoporous nanotubes that ...
Hong Pan, Qian Liu, Feng Chen, Shuangshuang Liu, Ziyang Zhang, Zehao Chen, Faming Gao   +6 more
wiley   +1 more source

Laser‐Directed Energy Deposition of Ti2AlNb Alloy: As‐Deposited Ultrahigh Strength and Heat‐Treated Strength–Ductility Balance

Rare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT An ultra‐high as‐deposited tensile strength of 1408 MPa—the highest reported value for laser‐directed energy deposition (L‐DED) fabricated Ti2AlNb alloy—is achieved in this study. The as‐deposited microstructure consists of coarse B2 grains with a high density of fine acicular O phase precipitates within the grains, along with a brittle α2 ...
Ximiao He, Shubo Gao, Hui Xue, Yi Song, Zheng Guo, Jiaqi Ma, Yongfeng Liang, Junpin Lin   +7 more
wiley   +1 more source

Emerging Polymer‐in‐Salt Solid Electrolytes for Advanced Lithium and Zinc Metal Batteries: Challenges, Progress, and Prospects

Rare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT Lithium metal anode and zinc metal anode have attracted considerable attention owing to their high theoretical capacity, low electrochemical potential, and superior electronic conductivity. However, their practical applications are greatly hindered by inherent issues such as uncontrollable dendritic growth and interfacial instability ...
Jing Wang, Fengzhou Li, Fei Wang, Qian Zhou, Xibo Tang, Longze Zhao, Cheng Zhang, Kunming Pan, Dongliang Wang, Yong Liu, Qiaobao Zhang   +10 more
wiley   +1 more source