New Mg-based alloy obtained by mechanical alloying in the Mg–Ni–Ge system

• Published in: Journal of alloys and compounds 2003-05, Vol.354 (1), p.187-192
• Main Authors: Gennari, F.C., Urretavizcaya, G., Andrade Gamboa, J.J., Meyer, G.
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Electron, ion, and scanning probe microscopy; Exact sciences and technology; Intermetallics; Materials science; Materials synthesis; materials processing; Mechanical alloying; Physics; Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation; Scanninng electron microscopy; Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; Thermal analysis; Transmission, reflection and scanning electron microscopy(including ebic); X-ray diffraction; X-ray diffraction and scattering
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(03)00002-1

The mechanical alloying (MA) of the 2Mg–0.5Ni–0.5Ge mixture at room temperature under argon atmosphere was investigated. The crystal structure, morphology and thermal stability of the products were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis and differential scanning calorimetry. A new alloy in the Mg–Ni–Ge system was synthesized by MA of the 2Mg–0.5Ni–0.5Ge mixture and by the combination of MA and subsequent thermal treatment. No evidence of the formation of Ni–Ge compounds was observed. The new ternary alloy can be considered isostructural with Mg 3Ni 2M-type compound, with a F cubic cell and a lattice parameter a=11.521 Å. Thermal studies show that the Mg–Ge–Ni alloy is stable upon heating up to 500 °C.