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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.43  No.8 (2002)  >  pp.1979-1984

MATERIALS TRANSACTIONS
<<Previous article Vol.43  No.8 (2002)   pp.1979 - 1984 Next article>>

High Strength Magnesium-based Glass Matrix Composites

Birgit Bartusch1), Frank Schurack1) and Jürgen Eckert1)
1) IFW Dresden, Institute for Metallic Materials

Magnesium-based glass matrix composites containing oxide particles were produced by mechanical alloying of Mg55Cu30Y15 elemental powder mixtures with the addition of MgO, CeO2, Cr2O3 or Y2O3 oxide particles. The formation of the glassy phase was characterized by X-ray-diffraction and transmission electron microscopy methods and was found to proceed almost unaffected by the presence of the oxides. Differential-scanning-calorimetry-analysis revealed, that the amorphous matrix features a wide supercooled liquid region with an extension of about 40–50 K. Differences in the thermal stability of the composites depending on the oxide addition are discussed. Viscosity measurements proved the existence of a characteristic minimum of viscosity in this temperature range which was used to consolidate the powders into bulk samples by uniaxial hot pressing. The deformation behaviour under compression at room temperature as well as at elevated temperature of 423 K yielded excellent properties compared to conventionally produced magnesium-based alloys.


Keyword:
magnesium alloys, metallic glasses, composites, mechanical alloying, mechanical properties

Received: February 22, 2002
Accepted: May 02, 2002 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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