September 18, 2017 12:19 PM

Magnesium is the lightest structural metal, 35% lighter than aluminum and 78% lighter than steel, thus possessing an exceptional lightweightness (strength-to-weight ratio). However, because of its hexagonal close packed (hcp) structure, the associated slips in hcp-Mg often causes Mg having limited ductility and formability. A research group using the HPCAT facility has synthesized 5 nm/5 nm Mg/Nb nanocomposites that display exceptional strength, ductility, and thermal stability.  More...

August 29, 2017 01:26 PM

C, Si and Ge all have sp3-bonded crystalline phases with cubic diamond structure. Both Si and Ge display well-known sp3-bonded tetrahedral amorphous forms which have widespread applications. However, the counterpart in C, an amorphous form of diamond, has been conspicuously missing and remained a puzzle.  More....

July 17, 2017 11:34 AM

The interplay of magnetism and superconductivity in iron-based superconductors remains a subject of extensive studies. Recently, pressure induced superconductivity was observed in Fe-ladder compound BaFe2S3, a quasi-one-dimensional prototype of iron-based superconductors. More....

June 26, 2017 04:52 PM

Accurate pressure scales remain a challenging subject in compression science.  In order to intercalibrate the equations of state (EOSs) of the three widely used pressure standards, gold, platinum, and MgO, a research group has measured their unit cell volumes using the laser-heated diamond anvil cell up to 140 GPa and 2500 K.   More...

June 23, 2017 06:58 PM

For decades it has been believed that lithium, the simplest metallic element, has a complicated ground-state crystal structure. Using synchrotron x-ray diffraction at HPCAT and multiscale simulations with density functional theory and molecular dynamics, a research group has shown that the previously accepted martensitic ground state is metastable. More...