High temperature XRD has been employed to monitor the devitrification of DuPont 951 low temperature co-fued ceramic (LTCC) and DuPont ES4005 resistor ink. The LTCC underwent devitrification to an anorthite phase in the range of 835-875 ‘C with activation energy of 180 kJ/mol as calculated from kinetic data. The resistor paste underwent devitrification in the 835875 ‘C range forming monoclinic a...

Erbium L(3)-edge extended x-ray absorption fine structure (EXAFS) measurements were performed on rare earth doped fluorosilicate and fluoroborate glasses and glass ceramics. The well known nucleating effects of erbium ions for the crystallization of cubic lead fluoride (based on x-ray diffraction measurements) and the fact that the rare earth ions are present in the crystalline phase (as indica...

The vitrification and devitrification features of lead fluoride are investigated by means of molecular dynamic simulations. The influence of heating rate on the devitrification temperature as well as the dependence of the glass properties on its thermal history, i.e., the cooling rate employed, is identified. As expected, different glasses are obtained when the cooling rates differ. Diffusion c...

Metallic glasses are lucrative engineering materials owing to their superior mechanical properties such as high strength and great elastic strain. However, the Achilles' heel of metallic amorphous materials - low plasticity caused by instantaneous catastrophic shear banding, significantly undercut their structural applications. Here, the nanolayered crystalline Cu/amorphous Cu-Zr micropillars w...

Pressure experiments provide a unique opportunity to unravel new insights into glass-forming liquids by exploring its effect on the dynamics of viscous liquids and on the evolution of the glass transition temperature. Here we compare the pressure dependence of the onset of devitrification, Ton, between two molecular glasses prepared from the same material but with extremely different ambient-pr...

Due to the rapid cooling of the slag infiltrated into the mold-strand gap, it is expected that the rate of devitrification of the glass formed plays a key role in determining the proportion of crystalline phases influencing mold heat transfer. In this investigation, a novel procedure to calculate Time-Temperature-Transformation (TTT) curves of mold slags is presented. It is based on the integra...

Effects of devitrification in metallic glasses are particular interest for their utilization various applications as the phase transformation from amorphous to crystalline state is known significantly change properties. In this work, we study effect on optical properties using spectroscopic ellipsometry technique. Ellipsometry measurements isothermally crystallized samples at controlled tempera...