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故障现象:冠捷AOC型(15英寸)彩色显示器,型号为5E。联上主机开机后,“黑屏”,其面扳上所有绿色指示灯伴随着机内继电器的“嗒嗒”声,有规律地周期性闪烁,闪烁周期大约为1S。 相似文献
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The effect of the elastic strain energy on the core-shell structures was studied in an Al-0.06Sc-0.02Er (at.%) alloy. A theoretical model for the calculation of the elastic strain energy caused by core-shell precipitates, which is applicable to materials with weak elastic ani-sotropy, was adopted. It was demonstrated that the partitioning of Er to the precipitate core did not reduce the elastic strain energy as expected in the previous study. The resistance due to the elastic strain energy to form an Al3(Sc0.36Er0.64)-Al3(Sc0.8Er0.2) core-shell precipitate was quite small, and could be easily overcome by the decrease of the total interfacial energy, which was consistent with the previous experimental re-sults. On the other hand, the resistance due to the elastic strain energy to form an Al3Er-Al3Sc core-shell precipitate was much larger than that to form an Al3(Sc0.36Er0.64)-Al3(Sc0.8Er0.2) core-shell precipitate, thus the partitioning of all the Er atoms to the core was strongly hindered by the elastic strain energy and was not observed in the experiment of the previous study.) 相似文献
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通过真空条件下Co-Fe-Sb三元体系1 073 K等温截面测定、Co-Fe-Sb三元体系凝聚态的热力学优化评估和气相组分的热力学数据计算,分析气相压力对该体系中二元和三元体系的相平衡和相稳定性的影响。结果表明:随着气相压力减小到一定程度,Co-Sb、Co-Fe、Fe-Sb和Co-Fe-Sb体系中的固相化合物相开始发生挥发分解,出现气液固三相平衡区,计算所得温度—压力曲线图表明每种化合物相都存在一个理论的压力极小值,并对应一个温度,在此压力之上或温度以下,不发生化合物由固相转变成气相的分解,凝聚态相保持与常压下基本相同的相平衡关系。计算结果从热力学上很好地解释了含Sb热电材料在试验研究和材料制备过程中存在的问题,对制备该化合物的工艺设计具有很好的参考作用。 相似文献
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故障现象:冠捷AOC 38cm(15英寸)彩色显示器,型号为5E,联上主机开机后,“黑屏”,其面板上所有绿色指示灯一齐伴随着机内继电器的吧嗒声,有规律地周期性闪烁,闪烁周期大约为1s。 相似文献
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应用Thermo-Calc热力学计算软件,模拟元素含量及热处理温度对镍基高温合金GH4706平衡相析出规律的影响。结果表明:平衡析出相的种类和析出温度范围与微观组织观测和差热分析的实验结果基本一致。MC碳化物的初始析出温度随Nb、Ti含量增加而降低,而析出量主要受C含量影响;η相初始析出温度与析出量随Ti含量增加而增大,受Nb、Fe影响较小;γ'相初始析出温度与析出量随Al含量增加而升高,受Ti、Nb含量影响较小;合金凝固过程中Nb、Ti会产生显著正偏析,Cr产生负偏析;Nb、Ti含量增加提高合金初熔点,降低合金的终熔点,使凝固温度范围变窄。 相似文献
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