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AP Smith 《Canadian Metallurgical Quarterly》1991,43(14):11635-11641
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On the stable Mg-Zn-Y quasicrystals 总被引:2,自引:0,他引:2
By the conventional air-cooled casting method, bulk ingots with a large fraction of stable Mg-Zn-Y icosahedral quasicrystals,
both simple and face-centered, were obtained. The quasicrystal structures were directly confirmed by high-resolution electron
microscopy (HREM) observations. The electron diffraction patterns from the quasicrystals were studied by computer simulations.
A coexisting crys-talline phase of the quasicrystals was identified as the Mg7Zn3 phase, which was proved to be the (1/1) approximant of the quasicrystals. The quasicrystals were stable during a continuous
heating process. However, at high temperature, oxidation occurred, and thus, Y2O3 and MgO products were formed. Oxidation at high temperatures is characteristic for the Mg-Zn-Y alloys and differs from Al-base
alloys. 相似文献
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JE Socolar 《Canadian Metallurgical Quarterly》1989,39(15):10519-10551
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