Chromium evaporation and oxidation characteristics of alumina-forming austenitic stainless steels for balance of plant applications in solid oxide fuel cells

The chromium (Cr) evaporation behavior of several different types of iron (Fe)-based AFA alloys and benchmark Cr₂O₃-forming Fe-based 310 and Ni-based 625 alloys was investigated for 500 h exposures at 800 °C to 900 °C in air with 10% H₂O. The Cr evaporation rates from alumina-forming austenitic (AFA) alloys were ~5 to 35 times lower than that of the Cr₂O₃-forming alloys depending on alloy and temperature. The Cr evaporation behavior was correlated with extensive characterization of the chemistry and microstructure of the oxide scales, which also revealed a degree of quartz tube Si contamination during the test. Long-term oxidation kinetics were also assessed at 800 to 1000 °C for up to 10,000 h in air with 10% H₂O to provide further guidance for SOFC BOP component alloy selection.     

Investigation of machining and wear performance of various diamond micro-grinding tools

The International Journal of Advanced Manufacturing Technology - The wear of micro-grinding tools less than 1 mm in diameter is crucial for achieving acceptable surface quality and accurate...     

Corrosion behavior of Cu–Sn bronze alloys in simulated archeological soil media

The corrosion behavior of synthetic Cu–Sn bronze alloys with six different Sn contents was examined through an electrochemical test and a synthetic test in a simulated corrosive medium. The mechanism of corrosion and the morphology of the corroded surfaces were characterized through field emission scanning electron microscopy equipped with energy-dispersive spectroscopy. At the corrosion potential, the corrosion behavior appears to be determined by the charge transfer step and the diffusion process. It was found that the bronze-IV (Cu–26.8Sn) specimen exhibited the best corrosion resistance, as evidenced by a low corrosion current density and a high impedance. This improvement resulted from an increase in the content of the Cu–Sn solid solution in the alloy, which was conducive to forming a relatively more protective passive film on the surface of the bronze alloy. This finding would be valuable in the anticorrosion protection of archeological artefacts after their excavation.     

钨系延期药预点火反应机理研究

通过程控升温模拟点火条件，根据ＤＳＣ图谱分析，找出主要反应区的温度范围。研究结果表明，钨系延期药预点火反应是一个真正的固－固反应。     

工艺条件对薄片陶瓷材料凝胶流延成型的影响

利用有机单体的聚合原理，成功进行了陶瓷薄片材料的凝胶流延成型。讨论了工艺条件对成型的影响。使用惰性气氛保护克服了单体聚合反应中的氧气阻聚问题，浆料在一定温度和气氛条件下能够顺利完成聚合反应。所成型的坯体具有良好的强度和柔韧性，在1550℃经2h烧结，烧结样品显微结构均匀，没有发现晶粒异常长大现象，烧结体致密度达到97．7％。     

DataSocket技术在远程测试中的研究与应用

本文介绍了一种实时数据传输技术-DataSocket,并给出了具体实例说明了如何将利用DataSocket技术来实现远程测试。     

精细陶瓷注射成型工艺现状及发展动态

精细陶瓷注射成技术远比人们起初想象复杂的多，它已不再被人们认为是由塑料工业直接转变而来的技术。本文论述了陶瓷注射成型工艺的关键技术及其发展动态，提出了今后注射民面临的主要问题及需要加强的研究领域。     

校园网络管理与安全

本文通过校园网的管理实践,针对校园网管理中出现的问题,阐述了校园网管理方面的一些看法、思考,并以我校校园网的管理为实例,提出了几点相应的解决问题的思路和方法,最后还介绍了网络教室中学生如何学习和教师如何教学以及病毒防治方面的一些内容。     

石英晶体振荡器的微处理器温度补偿技术研究

为改善石英晶体振荡器的频率特性,减小温度影响,通过对石英晶体振荡器的频率-温度特性的研究,提出了以微处理器（STC89C52RC）为核心的基于AT切晶体谐振器的温度补偿技术,并介绍了系统结构、补偿原理及硬件电路,给出了补偿结果。本设计具有结构简单、功耗低等优点。