查询词典 Si

The preferred (111) orientation of MgO films became better with the increase of the annealing temperature or thickness of the film. The oxidation of Si surface during the pyrolysis and crystallization of Mg alkoxide is suggested to account for the preferred (111) orientated MgO films on Si (100) and Si (111) substrates.

同时，退火温度的升高和薄膜厚度的增加都能使MgO(111)的择优取向性越来越好；Si的易氧化是导致镁醇盐经过高温分解结晶形成MgO(111)择优取向的主要原因。

The results show that, When is rapidly solidified AlFeVSi alloy exposed thermally at high temperature, main change below 500℃ in the alloy is Ostwald ripening of Al〓〓Si particle, and above 550℃, Al〓〓Si will congregate along grain boundaries, and even appear needle-shaped or clumpish θ-Al〓Fe〓 phase.

结果表明，快凝细粉AlFeVSi合金高温热暴露时，低于500℃，Al〓〓Si仅发生Ostwald粗化，高于550℃，Al〓〓Si则在晶界聚集，甚至有θ-Al〓Fe〓针、块状相形成。

The result showed that Si--Si covalent bond eAsts in the melt of eutectic and hyper--eutectic alloy and Sr has capability to weaken the coto bond.

结果表明，在共晶及过共晶的合金的液态结构中，存在着Si—Si共价键，Sr有削弱这些共价键的倾向。

The recent development of grain refining, interaction between Si and grain refiners, and grain refining mechanisms in hypoeutectic Al-Si casting alloys are overviewed in this paper.

仅对Al-Si铸造合金细化处理的最新进展、Si与晶粒细化剂的交互作用和晶粒细化机理进行综合评述。

The solidification microstructures of hypoeutectic, eutectic and hypereutectic Al-Si alloys by melt temperature treatment were studied comparatively.

摘 要：对3种典型成分的铝硅合金（Al-20%Si、 Al-12%Si和Al-7%Si）进行了熔体温度处理凝固组织变化规律的比较研究。

The current theory and application of Al-Si alloy mainly focus on the study of hypoeutectic and eutectic, therefore we systematically analyzed the modification process of hypereutectic Al-Si alloy based on the methods and results of predecessors. Several factors including the modification temperature, the content of modifier, the available holding time, the times of repeat melting , the casting temperature and the speed for cooling have been studied in order to understand its effects to the composition, function and performances of primary silicon and eutectic silicon.

中文摘要本文针对目前Al-Si合金相关应用和理论的研究多集中于亚共晶和共晶合金的情况，在前人的研究成果和研究方法的基础上，对过共晶Al-Si合金变质处理进行了较为系统的分析，研究了变质剂的成分配比、变质温度、变质剂的加入量、变质后的静置时间、浇注温度及冷却速度等因素对过共晶铝硅合金中初晶硅和共晶硅的大小、形状、数量和分布的影响。

The current theory and application of Al-Si alloy mainly focus on the study of hypoeutectic and eutectic, therefore we systematically analyzed the modification process of hypereutectic Al-Si alloy based on the methods and results of predecessors. Several factors including the modification temperature, the content of modifier, the available holding time, the times of repeat melting , the casting temperature and the speed for cooling have been studied in order to understand its effects to the composition, function and performances of primary silicon and eutectic silicon.

本文针对目前Al-Si合金相关应用和理论的研究多集中于亚共晶和共晶合金的情况，在前人的研究成果和研究方法的基础上，对过共晶Al-Si合金变质处理进行了较为系统的分析，研究了变质剂的成分配比、变质温度、变质剂的加入量、变质后的静置时间、浇注温度及冷却速度等因素对过共晶铝硅合金中初晶硅和共晶硅的大小、形状、数量和分布的影响。

The sliding wear behaviors under lubricating of hypoeutectic, eutectic and hypereutectic Al-Si alloys are investigated.

研究了亚共晶、共晶、过共晶 Al-Si 合金在润滑条件下的磨损行为，探讨了三类合金的磨损失效机理，得出提高Si含量是提高 Al-Si 合金耐磨性的有效途径。

Crystal structure of melilite is limited by MgO content of glazes, also restricted by O/Si ratio. Because of differences of ionic radius and ionic polarization capacity between Ca〓 and Mg〓, suitable O/Si ratio for melilite is influenced by content of CaO and MgO to a certain extent.

结晶釉中黄长石结构的出现，除了和MgO含量相关外，还受O/Si比值的限制；而Ca〓和Mg〓离子半径和离子间的极化能力的差异，使钙镁含量对形成黄长石结构的O/Si比值具有一定的影响。

The microstructural nomograph of these Al-Si alloys is constructed to provide for the selection of optimum addition of Sr or Sb in production practice Experimental results indicate a threshold of Sr content in Al-Si alloy modification, over it, the structure of Al-Si alloy may be completely modified even at quite slow cooling rate down to 4.5℃/min.

实验结果表明，Al-Si合金加Sr后变质存在一个变质阈值，超过这个阈值时，即便在投缓慢的冷速(4.5℃/min)下，仍能获得完全变质的组织。这个变质阈值随着冷速的减慢而增大。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。