https://multigrain.texture.rocks/ 2026-04-24T06:27:48+00:00 https://multigrain.texture.rocks/ https://multigrain.texture.rocks/lib/exe/fetch.php?media=wiki:logo.png text/html 2019-06-07T15:01:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://multigrain.texture.rocks/doku.php?id=dac_experiments:geometry&rev=1559919683&do=diff Multigrain crystallography experiment geometry Experiment geometry Geometry and axes are important for multigrain crystallography experiment. You need to know how is your experiment relative, how are you rotating, what are x, y, z axes ? The figure below gives an outline of a typical definition of laboratory axes and angles text/html 2024-07-30T15:14:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://multigrain.texture.rocks/doku.php?id=dac_experiments:info&rev=1722352449&do=diff Multigrain crystallography in the diamond anvil cell Multigrain crystallography allows characterizing hundreds of crystals in a polycrystalline material. It has been adapted to diamond anvil cell experiments for the investigation of materials under high pressure and high temperature. Simulations have shown that the method allows to index up to 500 grains with a theoretical resolution of 0.02° in grain orientation (Langrand et al, 2017). text/html 2019-02-18T10:11:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://multigrain.texture.rocks/doku.php?id=dac_experiments:sample_preparation&rev=1550484718&do=diff Sample preparation Starting material Laser cut in a slice of recovered sample coated with platinum * The material has to be ground down to an average grain size of about 2-3 µm while the maximum grain size should be less than 6 µm. * The fine starting material should be hot-pressed in a piston cylinder apparatus at around 1 GPa and 1200 °C. Depending on the assembly, a cylindrical sintered sample of few cubic millimeter is produced.