Results 41 to 50 of about 1,103,686 (145)
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT In Co‐based alloys, the γ phase is normally stable at high temperatures and the ε phase at low temperatures, and there is a martensitic transition on cooling to ∼417°C. In the γ/β dual‐phase CoCrAlY bond coat of turbine blade thermal barrier coating systems, we observed the opposite: γ remained stable at room temperature, yet it underwent a γ →
Junkai Liu +8 more
wiley +1 more source
四川大学学报. 自然科学版, 2011 从自然界分离筛选到产酸菌66株,经发酵和遗传稳定性测试后,保留L-乳酸产量高的菌株LC14作为诱变出发株;然后改造MRS培养基,以乙酸钠和乙酸为碳源,对突变株定向筛选,再经发酵测试复筛,最优突变株的L-乳酸产量达57.9 g/L,为出发株的2.2倍.又根据不同温度对细胞生长代谢的差异,建立了变温发酵过程:20 h前控温40℃,20 h后控温43℃,L-乳酸产量比恒温发酵提高了8.5 g/L,发酵时间缩短8h.最后利用响应面法优化发酵条件,优化后L-乳酸产量最高可达78.2 g/L.
李真金 +4 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The demand for advanced aerospace components necessitates near‐α titanium alloys with enhanced high‐temperature performance and compatibility with additive manufacturing (AM). To address this, an in situ alloying strategy was employed to co‐modify a Ti‐6.5Al‐2Zr‐Mo‐V alloy with Si and Y during laser powder bed fusion.
Zishuo Ma +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Precipitation of isothermal ω phase is an effective way to strengthen the metastable β‐Ti alloys but generally severely embrittles the materials by suppressing stress‐induced martensitic transformation and deformation twinning. Here, we architect heterogeneous structures with tailored ω phase in a metastable β‐Ti‐20Zr‐12Nb‐2Sn alloy via ...
Yang Liu +6 more
wiley +1 more source
四川大学学报. 自然科学版, 2015 本文测定并比较了低温（4℃）和高温（40℃）胁迫下,麻疯树幼苗叶片中的丙二醛、脯氨酸、可溶性糖、活性氧水平以及活性氧清除酶类的活性变化.研究发现在低温或高温胁迫下,活性氧（H2O2、O2-）含量均呈现出先保持不变后上升的趋势,而SOD、CAT、POD活性先上升后降低.在低温胁迫下,MDA、脯氨酸和可溶性糖含量随着胁迫时间增长而逐渐升高;而高温胁迫虽使MDA、脯氨酸含量增大,但变化趋势不如受冷胁迫的麻疯树变化明显,且高温胁迫未使可溶性糖含量发生明显变化 ...
蒋楠 +5 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT To meet the escalating demand for high‐performance LiCoO2 (LCO) cathodes, elevating the charging cut‐off voltage becomes highly imperative to achieve markedly enhanced specific capacities. However, high‐voltage operation is always accompanied by structural instability, notably deleterious bulk phase transitions and severe interfacial ...
Jiawei Mu +7 more
wiley +1 more source
, 2017 本实用新型公开了一种高温FDM3D打印设备，具体地，本实用新型的打印设备包括加热及温度控制系统、保温系统、散热系统和运动控制系统；其中，所述打印设备的部件包括打印头、成型基板和成型室，设有独立的控制电路；并且，所述打印头是由陶瓷发热体构成的，以及所述加热及温度控制系统还包括给所述成型基板加热的陶瓷发热板。本实用新型的打印设备具有打印温度高，能满足绝大部分高强度耐高温的高性能工程塑料的打印，同时利用成型室的保温功能 ...
程昱川 +5 more
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Jianzhu Gangjiegou Jinzhan, 2017 梁柱全焊节点在建筑钢结构中广泛应用,其火灾后受力性能对整个结构灾后承载安全至关重要。通过5个梁柱全焊节点试件高温冷却后的低周反复加载试验,研究了高温过火对其承载力、延性和耗能能力的影响规律。试验过火温度介于500800℃之间,冷却方式为自然冷却。试验结果表明,所有试件均发生梁柱翼缘对接焊缝处的断裂破坏。高温冷却后试件的抗弯承载力较未过火试件有所降低,延性和耗能能力有所提升,变化幅度统一呈现随过火温度的升高先增大后减小的变化规律。当过火温度为700℃时,节点承载力降低最大,降低幅度约为20 ...
陈颖, 朱美春, 程亮
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Zhongguo shiyan zhenduanxue, 2023 1 临床资料患者，女，62岁，因“双下肢水肿1个月”入院。患者缘于1个月前无明显诱因出现双下肢水肿，就诊于当地医院，辅助检查提示尿蛋白4+,予以保肾、补充白蛋白及对症治疗后未见明显好转，患者及家属为求进一步诊治就诊。病程中1周前有发热，体温最高达37.8℃,给予物理降温后体温降至正常，后未再发热。既往有高血压史1个月，血压最高达199/104 mmHg, 口服替米沙坦 40 mg每日1次及吲达帕胺 2.5 mg每日1次口服，
林萍, 贾红彦, 张瑜
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Infrared (IR) stealth is crucial for improving the survivability of equipment. The growing demand for service in marine environments poses new challenges to the composition and structural design of existing IR stealth coatings. This study first investigates the effects of NaCl/water vapor corrosion on the IR stealth performance of GH3536 and a
Kang Wang +5 more
wiley +1 more source