[IUCr Home Page] [Commission Home Page]

next up previous
Next: Stress determination in metals Up: Diffraction Previous: Quantitative analysis

Structure of alloys

When the components of an alloy are uniformly distributed throughout the metal, the sample will produce a typical powder photograph. If the metal is `worked' or, in certain cases, cooled, one of the components often `precipitates'. This can be observed on the powder photograph as `spots' where previously there were uniform lines. If the atoms of the alloy `order' (e.g. in $\beta$-brass) new lines are formed on the powder film--a `super-lattice' is said to be formed. These phenomena are easily observed by photographic X-ray techniques.

Copyright © 1981, 1997 International Union of Crystallography

IUCr Webmaster