Materials Sciences

Structural and chemical compositions of Si-Al Oxy-Nitride coatings altered through the use of reactive DC magnetron sputtering

Sialons are ceramics possessing chemical inertness, good thermal shock resistance, and excellent mechanical properties that are retained up to high temperatures. These properties mean sialon systems have found considerable applications in engineering.

Sialons are almost never found as natural minerals and sialon powders must be synthesized. They are

Researchers have taken an important step toward high-volume production of new nanometer-scale structures with the first systematic study of growth conditions that affect production of one-dimensional nanostructures from the optoelectronic material cadmium selenide (CdSe).

Using the results from more than 150 different experiments in which temperature and pressure conditions were systematically varied, nanotechnology researchers at the Georgia Institute of Technology created a “roa

Tape-cast silicon nitride for high temperature applications

With excellent high temperature strength, good resistance to oxidation and low coefficient of thermal expansion Si3N4 ceramic is one of the most important structural materials. However, the pure silicon nitride ceramics are difficult to densify and the addition of various oxides is used to improve sinterability.

Previous work has shown Lu2O3-SiO2 additives are useful in improving the bending strength of Si3N4 at

FSU researcher developing numerous uses for extraordinary ’buckypaper’

Working with a material 10 times lighter than steel — but 250 times stronger — would be a dream come true for any engineer. If this material also had amazing properties that made it highly conductive of heat and electricity, it would start to sound like something out of a science fiction novel. Yet one Florida State University research group, the Florida Advanced Center for Composite Technologies

Synthesis of Yttrium Aluminum Garnet by modifying the citrate precursor method

Yttrium Aluminum Garnet (YAG) is an important material used in the production of laser systems, for coating electronic devices, for tubes of cathodic rays and recently it has been considered as a suitable material for structural applications at high temperatures. In order to be successful in these applications the material properties such as optical properties, chemical stability at high temperature

Science researchers from the University of Versailles (France), in collaboration with the ID31 beam line at the European Synchrotron Radiation Facility (ESRF), report their progress in the design and characterisation of microporous materials. The combination of adept chemistry and computational design made possible the synthesis of a new material, named MIL-101 by its originators, (where MIL stands for Matériaux de l’Institut Lavoisier), with very large internal pores (ø~3.4nm) and surface area