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The microstructure and properties of two types of 7475 aluminium alloy matrix composites - with additions of 10÷20 wt.% of nano-Al2O3 or AlN (<40 žm) were investigated. The composites were produced through powder-metallurgy processing. Pre-alloyed 7475 aluminium powders were mixed with ceramic particles and milled in a high energy planetary Fritsch ball mill for up to 40 hours. Next, they were...
Metal matrix composites (MMC) were produced by the force infiltration of Saffil™ fiber preforms with high strength AA2024, AA6061 and AA7075. The preforms with ˜ 10 vol.% of fibers were bonded by dipping in liquid glass and heat treated at 800°C/2 hours. Next, the preforms were placed in a mould and the liquid alloy was forced into it. The composites microstructure was investigated using scanning...
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