A family of ductile intermetallic compounds.
Stoichiometric intermetallic compounds have always been touted for their attractive chemical, physical, electrical, magnetic and mechanical properties, but few practical uses have materialized because they are brittle at room temperature. Here we report on a large family of fully ordered, stoichiometric binary rare-earth intermetallic compounds with high ductility at room temperature. Although conventional wisdom calls for special conditions, such as non-stoichiometry, metastable disorder or doping to achieve some ductility in intermetallic compounds at room temperature, none of these is required in these unique B2 rare-earth compounds. Ab initio calculations of YAg, YCu and NiAl crystal defect energies support the observed deformation modes of these intermetallics.
Gschneidner
Karl
K
Ames Laboratory of the US DOE, 255 Spedding Hall, Iowa State University, Ames, Iowa 50011-3020, USA.
Russell
Alan
A
Pecharsky
Alexandra
A
Morris
James
J
Zhang
Zhehua
Z
Lograsso
Thomas
T
Hsu
David
D
Lo
C H Chester
CH
Ye
Yiying
Y
Slager
Aaron
A
Kesse
David
D
D016880:Anisotropy; D003300:Copper / Q000737:chemistry; D003460:Crystallization / Q000379:methods*; D003461:Crystallography / Q000379:methods*; D004419:Dysprosium / Q000737:chemistry; D004548:Elasticity; D008422:Materials Testing / Q000379:methods; D008674:Metals, Rare Earth / Q000737:chemistry*; D008854:Microscopy, Electron; D009038:Motion; D018030:Silver Compounds / Q000737:chemistry; D013314:Stress, Mechanical; D015019:Yttrium / Q000737:chemistry
D008674:Metals, Rare Earth; D018030:Silver Compounds; D004419:Dysprosium; D015019:Yttrium; D003300:Copper