Formation of Aluminium Nitride during Sintering of Powder Injection Moulded Aluminium
A TEM study of aluminium nitride formed during sintering of powder injection moulded aluminium under nitrogen is presented. A polycrystalline layer consisting of fine, rod-shaped crystallites of hexagonal AlN formed on the Al powder surfaces. The grain boundaries exhibit a double layer of AlN separated by a thin layer of Al. The structure of the AlN is characterised and its influence upon sintering discussed.
M.S. Dargusch & S.M. Keay
D. Kent et al., "Formation of Aluminium Nitride during Sintering of Powder Injection Moulded Aluminium", Materials Science Forum, Vols. 618-619, pp. 631-634, 2009