Effects of sample preparation on the mechanical properties of AlMgB14

TitleEffects of sample preparation on the mechanical properties of AlMgB14
Publication TypeJournal Article
Year of Publication2008
AuthorsMuthu DS, Chen B, Cook BA, Kruger MB
Journal TitleHigh Pressure Research
Volume28
Pages63-68
Date PublishedMar
Type of ArticleArticle
ISBN Number0895-7959
Accession NumberISI:000255207500008
Keywordsborides, high pressure, mechanical alloying, MGALB14, x-ray scattering
Abstract

Using synchrotron-based x-ray diffraction we have studied the behaviour of two different preparations of the super hard material AlMgB14 at pressures up to 41 Gpa. Analysis of lattice parameter data from the high-pressure x-ray measurements provides a bulk modulus (K) of 196 GPa and a pressure derivative of the bulk modulus (K') of 4.2 for sample 1, which was prepared by comminuting the elements and then hot pressing the sample. For sample 2, which was prepared by comminuting the elements and then cold pressing, K = 264 GPa and K' = 3.7. The differences in K and K' clearly demonstrate that sample preparation significantly affects the mechanical properties of AlMgB14.

DOI10.1080/08957950701846893
Alternate JournalHigh Pressure Res.