This work presents a novel in situ reaction approach to produce Al matrix composites from a powder mixture of Al/5 wt% Fe 2 O 3 by using selective laser melting (SLM). It is found that the SLM process not only is able to produce three‐dimensional parts, but also is capable of activating an in situ reaction in the powder mixture, producing particles mainly from alumina (Al 2 O 3 ) and iron combinations (such as Fe 2+ Al 2 O 4 ) in Al matrix. These particles (as reinforcements) can be distributed uniformly with a good particle/matrix interface under controlled conditions.
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Dadbakhsh et al. (2011) studied this question.