渗铝

Based on progress and tendency of high-temperature coating recently, Evolution and character of high-temperature coatings on aluminide, McrAlX and thermal barrier coating was commented, as well, progress and tendency of their structure.

该文在综合高温涂层的发展历程和研究、应用现状的基础上，简单评述了铝化物、McrAlX、热障涂层各自的发展及性能特点，以及这些涂层结构的研究发展状况；讨论了活性元素、晶界效应和涂层结构对高温涂层性能的影响机制；介绍了几种常用制备方法：扩散渗镀、PS、EB-PVD、磁控溅射的特点和应用情况。

TiAl ; cyclic oxidation ; surface modification ; aluminide coating ; pack cementation

TiAl ；循环氧化；表面改性；铝化物涂层；包埋渗

The Al concentration distribution in aluminized layer,microstructure and some properties of surface hardening layer were studied.

研究了渗层的铝浓度分布，硬化层的显微特性及有关性能。

This paper proposes to adopt impregnating technology to deal with the partial leakage of high-pressured thin-wall aluminium alloy castings.

针对承压的大型薄壁铝铸件的局部渗漏现象，采用浸渗方法消除。

The results show that the dissolution process of prefabricating alloy can be divided into two periods when the temperature of zinc melt is below the melting point of aluminum.Firstly,zinc melts infiltrates into the prefabricating alloy and then Zn-Al-TiC alloy forms in the surface layer of the prefabricating alloy.Secondly,the Zn-Al-TiC alloy of this alloy surface layer begins to dissolve to the zinc melt.

结果表明：当锌熔体温度低于铝熔点时，预制合金的溶解可分为两个阶段：第一阶段为液态锌向预制合金中浸渗，并在预制合金表层内形成Zn-Al-TiC合金；第二阶段为预制合金表层内的Zn-Al-TiC合金开始溶解并进入锌熔体。

Finally, aluminium alloy foam specimen with different structural parameters were made to investigate the variation of underwater sound absorption coefficient.

最后，本文利用前面得到的低压渗流法的较佳的工艺参数，制备了不同结构参数的泡沫铝样品，并研究了样品的水下声吸收系数的变化规律。

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。