Processing and properties of magnesium containing a dense uniform dispersion of nanoparticles

Magnesium is a light metal, with a density two-thirds that of aluminium, is abundant on Earth and is biocompatible; it thus has the potential to improve energy efficiency and system performance in aerospace, automobile, defence, mobile electronics and biomedical applications. However, conventional synthesis and processing methods (alloying and thermomechanical processing) have reached certain limits in further improving the properties of magnesium and other metals. Ceramic particles have been introduced into metal matrices to improve the strength of the metals, but unfortunately, ceramic microparticles severely degrade the plasticity and machinability of metals, and nanoparticles, although they have the potential to improve strength while maintaining or even improving the plasticity of metals, are difficult to disperse uniformly in metal matrices. Here we show that a dense uniform dispersion of silicon carbide nanoparticles (14 per cent by volume) in magnesium can be achieved through a nanoparticle self-stabilization mechanism in molten metal. An enhancement of strength, stiffness, plasticity and high-temperature stability is simultaneously achieved, delivering a higher specific yield strength and higher specific modulus than almost all structural metals.

[1]  K. Prewo,et al.  On the strength of discontinuous silicon carbide reinforced aluminum composites , 1986 .

[2]  A. Luo.  Recent magnesium alloy development for elevated temperature applications , 2004 .

[3]  A. Wilkinson,et al.  A microcantilever investigation of size effect, solid-solution strengthening and second-phase strengthening for 〈a〉 prism slip in alpha-Ti , 2011 .

[4]  J. Shin,et al.  Deformation behavior of magnesium in the grain size spectrum from nano- to micrometer , 2010 .

[5]  Hongseok Choi,et al.  Theoretical study and pathways for nanoparticle capture during solidification of metal melt , 2012, Journal of physics. Condensed matter : an Institute of Physics journal.

[6]  A. Luo,et al.  Cast magnesium alloys for elevated temperature applications , 1994 .

[7]  Sie Chin Tjong,et al.  Novel Nanoparticle‐Reinforced Metal Matrix Composites with Enhanced Mechanical Properties , 2007 .

[8]  K. Lu,et al.  The Future of Metals , 2010, Science.

[9]  Sriram Sadagopan,et al.  Microscale-calibrated modeling of the deformation response of dual-phase steels , 2014 .

[10]  Pradeep K. Rohatgi,et al.  Metal Matrix Composites , 2020, Composite Materials.

[11]  R. Gu,et al.  Size effect on the deformation behavior of duralumin micropillars , 2013 .

[12]  M. Barnett,et al.  Effective values of critical resolved shear stress for slip in polycrystalline magnesium and other hcp metals , 2010 .

[13]  D. Raabe,et al.  Size and orientation effects in partial dislocation-mediated deformation of twinning-induced plasticity steel micro-pillars , 2015 .

[14]  B. Drevet,et al.  Wettability at high temperatures , 1999 .

[15]  H. Ferkel,et al.  Magnesium strengthened by SiC nanoparticles , 2001 .

[16]  N. Chawla,et al.  Mechanical characterization of microconstituents in a cast duplex stainless steel by micropillar compression , 2014 .

[17]  Peter Beike,et al.  Intermolecular And Surface Forces , 2016 .

[18]  E. Ma,et al.  Nanostructured high-strength molybdenum alloys with unprecedented tensile ductility. , 2013, Nature materials.

[19]  A. Minor,et al.  In situ TEM compression testing of Mg and Mg–0.2 wt.% Ce single crystals , 2011 .

[20]  Z. Zhang,et al.  Consideration of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites: A model for predicting their yield strength , 2006 .

[21]  Mansoo Park,et al.  Powder-Route Synthesis and Mechanical Testing of Ultrafine Grain Tungsten Alloys , 2014, Metallurgical and Materials Transactions A.

[22]  Jenn‐Ming Yang,et al.  Effect of diamondoids on the microstructure and mechanical behavior of nanostructured Mg-matrix nanocomposites , 2015 .

[23]  Kentaro Hayashi,et al.  Novel hexagonal structure of ultra-high strength magnesium-based alloys , 2002 .

[24]  M. Hashmi,et al.  The wettability of SiC particles by molten aluminium alloy , 2001 .

[25]  Xiaochun Li,et al.  Novel nanoprocessing route for bulk graphene nanoplatelets reinforced metal matrix nanocomposites , 2012 .

[26]  Q. Jiang,et al.  Wetting and evaporation behaviors of molten Mg on partially oxidized SiC substrates , 2010 .

[27]  Yuval Golan,et al.  The role of interparticle and external forces in nanoparticle assembly. , 2008, Nature materials.

[28]  Raimund Erbel,et al.  Temporary scaffolding of coronary arteries with bioabsorbable magnesium stents: a prospective, non-randomised multicentre trial , 2007, The Lancet.

[29]  M. Pavese,et al.  The ExoMet Project: EU/ESA Research on High-Performance Light-Metal Alloys and Nanocomposites , 2014, Metallurgical and Materials Transactions A.

[30]  H. Watanabe.  Effect of Second-Phase Precipitates on Local Elongation in Extruded Magnesium Alloys , 2013, Journal of Materials Engineering and Performance.

[31]  P. Cao,et al.  Testing study of subcritical crack growth rate and fracture toughness in different rocks , 2006 .

[32]  J. Hao.  Microstructures and mechanical properties of extruded Mg-9Gd-4Y-0.6Zr-T5 at elevated temperatures , 2006 .

[33]  E. Arzt,et al.  Strength Effects in Micropillars of a Dispersion Strengthened Superalloy , 2010 .

[34]  S. Sikdar,et al.  Fundamentals and applications , 1998 .

[35]  M. Barnett,et al.  Influence of grain size on the compressive deformation of wrought Mg–3Al–1Zn , 2004 .

[36]  M. Barnett,et al.  Effect of particles on the formation of deformation twins in a magnesium-based alloy , 2009 .

[37]  T. Pollock.  Weight Loss with Magnesium Alloys , 2010, Science.

[38]  Xiaochun Li,et al.  Achieving uniform distribution and dispersion of a high percentage of nanoparticles in metal matrix nanocomposites by solidification processing , 2013 .

[39]  Terence G. Langdon,et al.  Using high-pressure torsion for metal processing: Fundamentals and applications , 2008 .

[40]  Kyu C. Cho,et al.  On the strength and strain to failure in particle-reinforced magnesium metal-matrix nanocomposites (Mg MMNCs) , 2012 .

[41]  C. Koch,et al.  Ultrastrong Mg Alloy via Nano-spaced Stacking Faults , 2013 .

[42]  P. Knochel.  A flash of magnesium. , 2009, Nature chemistry.

[43]  C. Schuh,et al.  Nanoindentation behavior and deformed microstructures in coarse-grained magnesium alloys , 2013 .

[44]  J. Nie.  Precipitation and Hardening in Magnesium Alloys , 2012, Metallurgical and Materials Transactions A.

[45]  X. Fang,et al.  Periodic Segregation of Solute Atoms in Fully Coherent Twin Boundaries , 2013, Science.

[46]  B. Gersh.  Temporary scaffolding of coronary arteries with bioabsorbable magnesium stents: a prospective, non-randomised multicentre trial , 2008 .