Results 41 to 50 of about 9,878 (165)
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Transition metal carbides demonstrate exceptional mechanical properties but confront a critical hardness–toughness trade‐off. Spinodal decomposition‐mediated phase separation is an effective approach to enhance mechanical properties in carbide ceramics through high‐temperature treatment.
Zhi‐Xuan Zhang +6 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2002 【目的】热刺激预处理诱导热休克蛋白表达, 观察它对复极化诱导的小脑颗粒神经元凋亡是否具有保护作用。 【方法】热刺激处理诱导热休克蛋白产生, 复极化诱导体外培养的小脑颗粒神经元凋亡, FDA 荧光染色计算细胞存活率, 相差 显微镜分析细胞形态, Hoechst 33258 染色分析核形态, 琼脂糖凝胶电泳分析DNA 片段, Western blo tting 检测HSP70表达。【结 果】小脑颗粒神经元在去极化条件(25 mmol/ L KCl)下生长良好, 复极化(5 mmol/ L KCl ...
陈丽君 +5 more
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Shuitu Baochi Xuebao, 2021 为明确秋耕对季节性冻融土壤热状况的调控作用，对比分析了翻耕（FG）、免耕（MG）、垄沟（LG）、翻耕活性炭覆盖（FH）和翻耕秸秆覆盖（FJ）5种处理对土壤温度、冻融循环以及土壤温度梯度等影响的差异。结果表明：与传统FG处理相比，MG、LG、FH、FJ处理均减弱了土壤温度与气温的相关性，降低了整个冻融期土壤温度的升、降温幅度和不同冻融阶段土壤温度昼夜变化的变异性程度，维持土壤温度序列稳定的能力FJ>FH>LG>MG。FG处理最先冻结和融化，其余处理延缓土壤冻结和融化速度的效果为FJ>FH>LG>MG ...
孙开, 王春霞, 蓝明菊, 梁飞
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Preparation and Electromagnetic Wave Absorbing Property of SiC Fiber /Epoxy Resin Composites [PDF]
, 2015 本论文对碳化硅（SiC）纤维进行热处理，制备了不同电阻率的SiC纤维；利用不同电阻率的SiC纤维与环氧树脂复合，制备单层、两层和三层复合材料，测试其在X波段下的电磁参数及吸波性能；利用传输线理论，计算预测了纤维电阻率、纤维体积分数、材料厚度和叠层方式对复合材料吸波性能的影响规律，并将实验结果与理论计算结果进行了对比验证。 研究发现，在1000-1500C温度区间，随着热处理温度的升高，SiC纤维的电阻率大幅度降低。当热处理温度达到1500C时，纤维电阻率约为1ohm.cm。随着纤维电阻率的降低 ...
李华展
core
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Introducing oxygen vacancies has emerged as an essential strategy to affect the sensing properties of nanomaterials. However, existing methods for manipulating oxygen require high cost, complex operation, and harsh conditions. Herein, a simple NH4+‐assisted heat treatment approach was designed to regulate the concentration of oxygen vacancies ...
Qiu‐Yue Zheng +10 more
wiley +1 more source
Shuitu Baochi Xuebao, 2022 为探究在非灌溉季节施加生物炭对滴灌棉田耕层土壤水热特性和三相结构的调控效应。设置生物炭15(B1),30(B2),45(B3),60(B4),0(B0) t/hm25个施加量,分析其对新疆滴灌棉田非灌溉季节耕层土壤(0—40 cm)三相结构、总孔隙度、土壤温度和土壤含水率的影响。结果表明:与对照处理相比,施炭处理使土壤固相体积降低2.58%~10.74%,总孔隙度增加3.38%~12.05%;同时,施炭处理的融后土壤质量含水率较对照处理提高1.07%~2.65%;施炭处理的土壤导热系数降低 ...
邹瑞晗 +4 more
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Rheological Properties of Polycarbosilane at Molten State [PDF]
, 2014 聚碳硅烷（PCS）是制备碳化硅基陶瓷及纤维的重要先驱体，熔融纺丝是制备碳化硅陶瓷纤维的关键步骤，掌握PCS在加工温度（熔融状态）下的流变性能至关重要。但是，PCS具有分子量低、分子结构复杂和对外界环境敏感等特点，其熔融状态下的流变性能至今仍不清楚，目前主要是通过经验性的方法来选择PCS熔融纺丝的工艺条件，缺乏理论依据和科学基础。因此，本论文着重研究加工温度（熔融状态）下PCS的流变性能，结合分子结构的分析，探讨微结构和流变性能的关系。 通过热处理PCS原料，得到一系列PCS样品 ...
陈惠贞
core
Constructing Serrated Boride Composite Layer for Enhancing Wear Resistance of Ti6Al4V Alloy
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Appropriate configuration combined with strong interface bonding is the essential requirement for developing high wear‐resistant coatings. Herein, based on the powder‐pack boriding process, the properties of Ti6Al4V alloy are effectively improved by constructing a serrate tribological boride composite layer.
Ying Wu +9 more
wiley +1 more source
Gaoya dianqi, 2007 金属化膜电容器的优点是储能密度高、可靠性高及成本低,其自愈特性和端部通流能力与层间压强有关。笔者用理论方法计算了层间压强,并根据液体表面产生附加压强原理,分析和计算了金属化膜电容器热处理前后层间压强的变化。计算结果表明,电容器的层间压强是由里向外是递减的,经热处理后的压强是热处理前压强的3倍以上。
孔中华 +4 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Silica nanosheets (SiO2 NSs) hold great promise for advanced thermal protection applications because of their exceptional thermal and chemical stability. However, their development has been hindered by challenges in scalable synthesis and structural integration for specialized applications.
Qun‐Yao Yuan +3 more
wiley +1 more source