Self-compacting concretes (SCC), a new type of concrete, were realized with the development polycarboxylate-based chemical additives. The interaction these additives powder materials in nano and micro scales affects fresh hardened properties concrete meso macro scales. To change improve macro-dimensional it is necessary to better analyze nano-micro-dimensional interaction. aim this study examin...

In this research, various types of nitride additives were incorporated into titanium diboride attaining dense TiB2-based ceramics by field-assisted sintering technique. The addition different additives, namely Si3N4, BN, AlN, and TiN, significantly improved the sinterability TiB2, achieving near fully ceramics. X-ray diffraction analysis microstructural evaluation confirmed presence h-BN compou...

Title: METALLIC NANO-PARTICLES AS FUEL ADDITIVES IN AIR-BREATHING COMBUSTION Gregory Young, Doctor of Philosophy, 2007 Directed By: Associate Professor, Dr. Kenneth H. Yu, Department of Aerospace Engineering For volume limited propulsion systems, the use of metals as fuel additives offers to increase performance by increasing the volumetric energy stored in the fuel. Highspeed airbreathing comb...

In this study the effect of nano meter size ZrO2 particles on the microstructure, densification and hydration resistance of magnesite –dolomite refractories was investigated. 0, 2, 4, 6 and 8 wt. % ZrO2 particles that were added to magnesite –dolomite refractories containing 35 wt. % CaO. The Hydration resistance was measured by change in the weight of specimens after 72 h at 25℃ an...

In this work, the strontium-doped lanthanum manganite- a ceramic material- used as cathode in solid oxide fuel cells. An impression of grinding time on the structural and thermal properties of Sr-doped LaMnO3 system with La1-xSrxMnO3 (x=0.2) stoichiometric ratio was investigated. The nano crystallite LSM powder with cubic structure was prepared by varying the milling time of planetary monomill ...

In this study, carbide-forming metallic additives (W, Mo, Cr, Ti) were introduced into the copper matrix to improve wettability of diamond particles in copper–diamond composites. The samples prepared by Spark Plasma Sintering (SPS) and Hot Pressing (HP) at 920 °C. phase composition, microstructure thermal conductivity investigated. influence additive concentration, sintering method as well natu...