Characterization Of Oxide Particles Research Articles

Characterization of oxide particles in ODS austenitic stainless steel after heavy ion irradiation up to high doses

ABSTRACTOxide dispersion strengthened austenitic stainless steel (ODS316), which is based on advanced SUS316 steel, has been developed by mechanically alloying and hot extrusion. Hafnium and titanium were added to make a fine distribution of oxide particles. The stability of oxide particles dispersed in ODS316 under irradiation was evaluated after 250 keV Fe+ irradiation up to high doses at 500 °C. TEM observation and EDS analysis indicated that fine complex oxide particles with Y, Hf and Ti were mainly dispersed in the matrix. There are no significant changes in the distribution and the size of oxide particles after irradiation. It was also revealed that the constitution ratio of Ti in complex oxide appeared to be decreased after irradiation. This diffuse-out of Ti during irradiation could be explained by the difference in oxide formation energy among alloying elements.

Electroless Metallization and Characterization of Oxide Particles

not Available.

Separation and characterization of oxide particles by capillary electrophoresis

Separation of oxide particles by capillary electrophoresis (CE) is a relatively unexplored area. In environmental studies the ability to separate chemically different oxides by CE would permit characterization of the composition of mixtures of such particulate species and potentially could afford concentration enhancement or isolation of particular oxides from complex particulate matrices. Knowledge of the influence of different components of particle-suspending solutions on the surface characteristics of oxides assists in optimizing separations of particulate species. The effects of phosphate, carbonate, and borate anions and the sodium ion concentration on the electrophoretic mobility of titania, hematite, and alumina are investigated. All three anion types have significant effects on the electrophoretic mobility of each of the oxides, with borate anions yielding the highest degree of selectivity between titania and alumina. An Na+ concentration of 3 mM provides the best quality oxide separations for each of the buffer systems. © 1996 John Wiley & Sons, Inc.

Separation and characterization of oxide particles by capillary electrophoresis

Separation of oxide particles by capillary electrophoresis (CE) is a relatively unexplored area. In environmental studies the ability to separate chemically different oxides by CE would permit characterization of the composition of mixtures of such particulate species and potentially could afford concentration enhancement or isolation of particular oxides from complex particulate matrices. Knowledge of the influence of different components of particle-suspending solutions on the surface characteristics of oxides assists in optimizing separations of particulate species. The effects of phosphate, carbonate, and borate anions and the sodium ion concentration on the electrophoretic mobility of titania, hematite, and alumina are investigated. All three anion types have significant effects on the electrophoretic mobility of each of the oxides, with borate anions yielding the highest degree of selectivity between titania and alumina. An Na+ concentration of 3 mM provides the best quality oxide separations for each of the buffer systems. © 1996 John Wiley & Sons, Inc.