ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The relationships of optimal compositions of bulk metallic glasses (BMGs) have beenanalyzed with a set of thermodynamic quantities of mismatch entropy normalized with respect toBoltzmann's constant (Sσ!/kB) and mixing enthalpy ([removed info]Hmix) and with assistance of classification resultof BMGs. The analysis shows clear dependence of the location of Sσ!/kB and [removed info]Hmix values for optimalcompositions of ternary BMGs in Sσ!/kB-[removed info]Hmix chart in each alloy system. The ternary BMGs aresummarized into four types: (1) Cu-based, (2) La-, Zr- and Ca-based, (3) Pd-based and (4) Fe- andMg-based BMGs according to their maximum value of Sσ!/kB ((Sσ!/kB)max) and the largest and negativevalue of [removed info]Hmix (([removed info]Hmix)L.N.) or their half values which are obtained for each system. These types ofBMGs are related with the local arrangements of BMGs, which are widely accepted as an icosahedralstructure for Metal-Metal type, a transformed tetragonal dodecahedrons and triacontrahedronsstructure for Pd-Metalloid type, and a network-like structure for Metal-Metalloid type
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1988.pdf
