Fundamentos e técnicas de difracção por raios-X
 

Apresentações da workshop

Cours portugal part I.pdf (3.004 KB)

Cours portugal part II.pdf (4.191 KB)

Examples of in situ studies.pdf (2.137 KB)

Exploitation donnee EBSD patrick V compress part1.pdf (6.374 KB)

 

 

Datas: 25-27 de Maio de 2010
Curso teórico e experimental sobre os fundamentos básicos e fundamentais associados à técnica da difracção por raios-X.
Local: Anfiteatro Anf. EA1.31 (Escola de Arquitectura), Anfiteatro B1.10 (Escola de Engenharia) e instalações do SEMAT/UM, Campus de Azurém da Universidade do Minho
 

Abstract:
 

X-Ray Diffraction is an experimental technique used to characterize the crystallographic structure, crystallite size (grain size), preferred orientation in polycrystalline materials, or the residual stress state of a crystalline material. The purpose of the lectures will consist to give the fundamentals of x-ray diffraction: basis of the theory of x-ray diffraction, the experimental methods and a few applications.
 

• phase analysis (peak positions and peak intensity)

• texture analysis (variation of peak intensity)

• grain size – microdistortions (peak shape)

• X-ray strain or stress analysis (shift of peak position)

Agenda:

- Day 1 : Morning (Anf. EA1.31: 9h30m) and afternoon (Anf. B1.10: 14h)
1-Fundamentals of X-ray : production of x-ray, characteristic spectrum, absorption, …
2-Basics of crystallography : lattices, crystal structure, stereographic projection.
3-Introduction to diffraction – Bragg law
4-Scattering by an electron, an atom, a unit cell, structure factor calculations.
5-Reciprocal lattice

- Day 2: Morning (Anf. EA1.31: 9h30m)
1-Intensities of powder diffraction lines
2-Examples of intensity calculations

-Day 2: Afternoon (SEMAT/UM: 14h)
Pratical sessions: diffractogram acquisition and analysis.
We will start with the simplest case of a polycrystalline material composed of a random distribution of crystallites (as for example a powder).

-Day 3 : Morning (Anf. EA1.31: 9h30m)
1-Experimental methods (i.e. goniometers, detectors 0D, 1D, 2D and also Laue diffractogram and/or powder diffractogram).
2-Examples of application : Grain size measurements and texture analysis.

- Day 3: afternoon (SEMAT/UM: 14h)
Pratical sessions: more examples and some exercises (grain size measurements and texture analysis)


Tutor:

Dr Pierre Olivier Renault
Laboratoire PHYMAT ( Physique des Matériaux)
UMR 6630 -  Université de Poitiers-CNRS
SP2MI -  BP 30179 - 86962 Chasseneuil- Futuroscope Cedex – France

 

Registo:
Nota: Não se aceitam mais inscrições para os os módulos práticos.
As inscrições para os módulos teóricos são limitadas a 30, sendo os formandos inscritos por ordem de confirmação.