Interface structures of the (Al2O3 + Al3Zr)/A356 nanocomposites fabricated by magnetochemistry in situ reaction

The interface structures of the (Al2O3 + Al3Zr)/A356 nanocomposites fabricated by magneto-chemistry in situ reaction are investigated by TEM technologies. The results indicate that the Al3Zr/Al, Al2O3/Al and Al2O3/Si interfaces are net and smooth, no interface reactants are observed. The vector relations for Al3Zr and α-Al phases are: [2¯ 2¯ 1]Al3Zr[0 0 1]Al, (0 1 2)Al3Zr(1 1¯ 0)Al, and [1¯ 1 0 0]α-Al2O3[1¯ 1 1]Si, (0 0 0 1)α-Al2O3(1 1 0)Si for α-Al2O3 and Si phases. The misfit degree δ for the (0 0 0 1) crystal plane of the α-Al2O3 phase and the (1 1 0) crystal plane of the Si phase is 5.08%. The interface fit-relations for the Al2O3 phase and the Si phase are that the Si phase can be nucleated on theα-Al2O3 phase. These contribute to the perfect properties of the nanocomposites.