| Abstract |
| Fabrication method of aluminum nitride reinforced aluminum composites using gas-melt in-situ reaction was investigated. AA 5083 aluminum alloy was melted in vacuum and nitrogen atmosphere, and then nitrogen gas bearing 12.5% ammonia gas was injected in the molten alloy through alumina and graphite tube for 4 hours at the temperature of 1100℃. The melt was divided into the upper and lower parts. There were many AlN particles in the upper part and no AlN in the lower part. In order to mix the upper and lower part, an impeller was introduced to the melt. There was also two parts with decreased thickness of the upper part and small amount of AlN in the lower part. Formation of AlN has been identified by optical and transmission electron microscopy, X-ray diffraction, and electrolytic extraction method. AlN was evolved in the form of a cluster with hexagonal particles of 1 μm and a rod of about 3 μm length. |
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| Key Words |
| A1N, Aluminum alloys, in-situ reaction, Nitrogen, Ammonia, Gas injection |
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