Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...

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Atomic size (static displacements) affect phase stability/ properties • Ionic materials (Goldschmidt) – Ratio of Components – Ratio of radii – Influence of polarization • Metals and alloy phases (hume-Rothery) – Ratio of radii – Valence electron concentration – Electrochemical factor c FeNi r 110 FeFe r 110 Grand challenge -include deviations from lattice in modeling of alloys NiNi r 110 a a
Measurement and theory of atomic size are hard! • Theory- violates repeat lattice approximation- every unit cell different! • Experiment – EXAFS marginal (0.02 nm) in dilute samples – Long-ranged samples have balanced forces Important!
Page 1 and 2: Diffuse Scattering • Anticipatory
Page 3 and 4: Presentation concentrates year grad
Page 5 and 6: What you already know- arrangement
Page 7 and 8: If crystal lattice of atoms leads t
Page 9 and 10: You already know length scales are
Page 11 and 12: Who the heck was Krivoglaz? • Bri
Page 13 and 14: Single crystals and surfaces -trunc
Page 15 and 16: A little math helps for party conve
Page 17 and 18: X-rays scattering measurements infe
Page 19 and 20: Extra diffuse scattering often obse
Page 21 and 22: Complete transformation induced by
Page 23 and 24: Neutrons uniquely sensitive to low
Page 25 and 26: Alloys can have another type 1 defe
Page 27 and 28: Neutron/ X-rays Complimentary For S
Page 29: X-ray anomalous scattering can chan
Page 33 and 34: High-energy x-ray measurements revo
Page 35 and 36: Dislocations -Krivoglaz defect of t
Page 37 and 38: Intense microbeams/area detectors p
Page 39 and 40: Diffuse microdiffraction holds prom
Page 41 and 42: Numerical calculations determine qu
Page 43 and 44: X-ray Diffuse Scattering Huang theo
Page 45 and 46: Corelli SNS beamline specialized fo
Page 47 and 48: New directions in diffuse scatterin
Page 49 and 50: A. Gunier Diffuse scattering done b

Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...

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