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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.5; Jul 7-11, 2003; Leganes, Madrid, Spain >Effect of Mg as Sintering Additive on the Consolidation of Mechanically Alloyed Al Powder
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Effect of Mg as Sintering Additive on the Consolidation of Mechanically Alloyed Al Powder

机译：镁作为烧结助剂对机械合金化铝粉凝固的影响

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Mechanically alloyed aluminium, MA Al, powder particles are hard and covered by surface oxide layers. This gives problems in consolidation processing. Consolidation is often carried out by hot extrusion, as the main processing step. An alternative consolidation method consisting in a press-and-sinter process has been developed at the University of Seville. MA Al powder was prepared by attrition milling. To improve the sinterability of MA Al powder, small amounts of magnesium, ranging from 0.0 to 1.2 wt% Mg, were added after milling. The mixed powder was consolidated by cold pressing (1120 MPa) and vacuum sintering (650℃, 1h). Different mechanical and structural studies have been carried out. It has been observed that the addition of magnesium improves the mechanical properties of sintered MA Al. This is attributed to the reducing action of Mg on the Al sesquioxide layer and to the formation of liquid phases during sintering.
机译：机械合金化的铝（MA Al）粉末颗粒较硬，并被表面氧化物层覆盖。这在合并处理中产生了问题。作为主要加工步骤，通常通过热挤压进行固结。塞维利亚大学已开发出一种包含压制和烧结工艺的替代固结方法。 MA Al粉通过磨碎制备。为了改善MA Al粉末的可烧结性，在研磨后添加0.0-1.2重量％Mg的少量镁。通过冷压（1120 MPa）和真空烧结（650℃，1h）固结混合粉末。已经进行了不同的机械和结构研究。已经观察到，镁的添加改善了烧结的MA Al的机械性能。这归因于Mg对倍半氧化铝层的还原作用以及在烧结过程中液相的形成。

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