Actor Jeong Si-a shared updates on her "elite siblings." On the 7th, the YouTube channel "Jeong Si-a Asi Jeong" published a video titled "Jeong Si-a's Recent Updates After a Tough Time? | The Reason ...

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为解决Nb-Si基高温合金在1200-1300°C极端环境下的抗氧化性能不足问题，研究人员通过包埋渗法制备了B改性硅化物涂层，系统研究了其氧化失效行为。结合Boltzmann-Matano理论和Wagner氧化理论，建立了寿命预测模型，揭示了Si耗尽(临界值22.1 wt.%)导致(Ti, Nb)5Si4相生成和 ...

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随着航空航天发动机推重比的持续提升，涡轮叶片工作温度已逼近传统镍基单晶合金（1150℃）的耐温极限。兼具低密度（6.6-7.2 g/cm³）与高温强度的Nb-Si合金（熔点1950℃）成为下一代高温结构材料的理想选择。其加工过程中易氧化、热累积效应显著等问题，导致 ...

Abstract: Josephson junctions with cosputtered amorphous Nb–Si barriers are being developed at NIST for use in voltage standard circuits. These junctions have the potential for a wide range of ...

Nb-Si 基合金作为航空发动机潜在材料，却受限于室温断裂韧性不足（KQ 较低）。研究人员通过实验和第一性原理计算，探究 Ta 掺杂对 Nb - 16Si - 22Ti - xTa 合金微观结构和断裂韧性的影响。结果表明，Ta 掺杂使合金相含量和 KQ 呈先升后降趋势。该研究有助于揭示 Ta ...

Learn how to use Microsoft Excel step by step in this beginner-friendly tutorial. If you're new to Excel or want to understand the basics, this video shows you how to get started using Excel right ...

Many Excel users find themselves trapped in an endless cycle of watching tutorials without effectively applying what they’ve learned. This dependency on tutorials can hinder progress and prevent the ...