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Behaviour of Fe coating of Mg powder using mechanical milling process

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2012
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2012-02-01
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Abstract
In order to synthesize a thermally stable Mg powder as a desulfurizer of iron melts, pure Mg powder was coated by Fe powder, using a mechanical milling process. Since there is a wide range of approaches to MA, behaviours such as the size, morphology and layer thickness were investigated as a function of milling condition. As the milling conducted from 30 min, to 1 h, 3 h, 5 h, 7 h, 10 h, 20 h, 23 h and 30 h, Fe particles began to stick on the surface of Mg powders. The layer of Fe formed from 1 h milling was about 3,8μm thick and gradually thickened to be 6μm, 11μm and 15μm with increasing the milling time to 5 h, 10 h and 30 h, respectively. The surface of coated powder became more widespread after 10 h milling; appearing the first coating signals after 30min. Due to Fe resistance to coating, the layer composition was studied under electronic microscope, discovering an optimal milling time.
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Aleaciones metálicas, Aleaciones férreas, Ensayo de materiales
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