X-ray diffraction equipment

H. K. D. H. Bhadeshia

Desktop X-ray diffraction machines for teaching undergraduates the way diffraction data are collected. Everything is manual, for example, the manipulation of the Geiger counter as a function of two-theta in order to plot peaks. The movie below shows the meter which reads the signal from the Geiger counter, which is kept at a fixed position. Nevertheless, there is a variation in the count rate due to the stochastic nature of X-ray emisssions.

$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ The leaded shield is here in a closed position	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ The radiation symbol is in fact on the another shield. On the right is the meter for the Geiger counter.
$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ Not properly set up, but there are collimators and nickel filter in the slide holder that also retains the Geiger counter.	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ The Ni filter is to cut some of the K-beta Cu X-rays.
$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ Although the light is on, the X-rays are not because the shield is not in position	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ III
$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ Bought two of these for the practical class.	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ The machines require these keys to operate.
$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ III	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ III
$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ III	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ III
$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ The counter is rotated about the centre to measure counts versus two-theta	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ III
$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ This is something else which is in my wish list, but not yet constructed at QMUL because the polarisers did not arrive on time.	$Harry Bhadeshia, University of Cambridge, Queen Mary University of London, X-ray diffraction, polarisers, teaching, metallurgy, crystallography$ I wish to demonstrate phase transformations in polymers as a function of stress and strain, by stretching them between crossed polars. Any development of crystallinity will transmit light, otherwise dark.

4th edition, 2017

Free download

Free download

Innovations in everyday engineering materials

Available

Available

PT Group Home

Materials Algorithms