Microstructure MENA3100,OBK, 18.01.12. Based on chapter 1 The Consept of Microstructure.

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Presentation transcript:

Microstructure MENA3100,OBK,

Based on chapter 1 The Consept of Microstructure

Microstructural morphology Microanalysis Crystal structure

How? Interaction between sample andlight X-rays electrones ImageSpectrumDiffraction pattern + SPM neutrons

SEM Optical microscopy Electron microscopyScanning electron microscopy (SEM) Transmission electron microscopy (TEM) DiffractionX-ray diffraction (XRD) Electron diffraction Neutron diffraction X-ray spectroscopyEnergy dispersive spectroscopy (EDS) Wavelength dispersive spectroscopy Auger electron microscopy X-ray photo spectroscopy (XPS) Electron energy loss spectroscopy (EELS) Scanning probe microscopy (SPM)Atomic force microscopy (AFM) Scanning tunneling microscopy (STM)

Structure-insensitive Young’s modulus Thermal expansion coeffisient Specific gravity Yield strength Thermal conductivity Electrical resistivity Is microstructure important? Well... Why? Structure-sensitive

”Mikrostruktur” Makrostruktur Mesostruktur Mikrostruktur Nanostruktur s. 10

PolycrystallineMultiphaseA crystal CalciteMarbleGranite Monocrystalline

Equidimensional Acicular Tabular... Crystals can be:

Measure size Caliper diameter D A = N A -1/2 D L = N L -1 ASTM Grain-size Chart

Dislocations

Crystallography Enhetscelle Gitter + basis

Crystal system Axial system Bravais lattice Point group Space group

Crystal system 7

NOT ATOMS!

Crystal system 7

Stereografisk projeksjon