铝基合金

In this paper the as-cast microstructure, the rules of phase precipitation, the change of microstructure and minor phase content and the degeneration of aluminide coating after thermal exposure at temperature range from 850℃ to 1100℃ for 1000-3000 hours have been studied in comparison between two kinds of low chromium-high tungsten cast nickel-base superalloys.

本文对比地研究了两种低铬-高钨系列的铸造镍基高温合金的铸态显微组织，在850～1100℃范围内热暴露1000～3000小时后的相析出规律，显微组织和微量相的变化及铝化物涂层的蜕化。

The high-temperature oxidation and degradation behavior were analyzed for the aluminide coating on Co-base superalloy , and the relationship between the oxidation and life has been deduced for the coating.

通过分析钴基超合金外扩散型铝化物涂层的高温氧化及退化行为，并采用近似方法推算，得出了这类涂层氧化和退化与时间的关系。

Keywords aluminum polychloride;Ni-Al alloy powder;sodium metaaluminate;hydrochloric acid addition;concentration ratio of hydroxyl to alumi

聚合氯化铝； Ni-Al合金粉；偏铝酸钠；加酸量；盐基度

Our study shows that, aluminum segregates on the alloy surface through the grain boundary diffusion and combines with oxygen to form dense Al2O3 oxide film which blocks oxygen to diffuse into the niobium matrix.

研究表明：铝通过晶界扩散偏聚在合金表面，并与氧结合生成致密的Al2O3氧化膜，阻挡氧向铌基体扩散。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。