Author: Gerald B. StringfellowPublisher:
ISBN:
Category : Aluminum compounds
Languages : en
Pages : 46
Book Description
Effects of Impurities on the Strength of Alumina
Author: Gerald B. StringfellowPublisher:
ISBN:
Category : Aluminum compounds
Languages : en
Pages : 46
Book Description
Effect of Impurities on the Strength of Aluminum Oxide
Author: Louis Severn CookPublisher:
ISBN:
Category : Aluminum oxide
Languages : en
Pages : 122
Book Description
Effect of impurities on the strength of aluminium oxide
Author: Louis Severn CookEffects of Impurities on Alumina-Niobium InterfacialMicrostructures
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Optical microscopy, scanning electron microscopy, and transmission electron microscopy were employed to examine the interfacial microstructural effects of impurities in alumina substrates used to fabricate alumina-niobium interfaces via liquid-film-assisted joining. Three types of alumina were used: undoped high-purity single-crystal sapphire; a high-purity, high-strength polycrystalline alumina; and a lower-purity, lower-strength polycrystalline alumina. Interfaces formed between niobium and both the sapphire and high-purity polycrystalline alumina were free of detectable levels of impurities. In the lower-purity alumina, niobium silicides were observed at the alumina-niobium interface and on alumina grain boundaries near the interface. These silicides formed in small-grained regions of the alumina and were found to grow from the interface into the alumina along grain boundaries. Smaller silicide precipitates found on grain boundaries are believed to form upon cooling from the bonding temperature.
Effects of Impurities on the Sintering of Alumina
Author: Rodney Delano BagleyPublisher:
ISBN:
Category : Alumina
Languages : en
Pages : 422
Book Description
Effects of Impurities on the Hydrothermal Reactions of Alumina
Author: Shuitiro OnoPublisher:
ISBN:
Category : Aluminates
Languages : en
Pages : 40
Book Description
Corundum (Al2O3) was obtained from boehmite (AlOOH) under hydrothermal conditions at temperatures above 400C. The grain size of the crystals with definite habits was 10 to 100 microns. The effects of impurity on the crystallization process of corundum were investigated. It was found that the reaction rate, crystal size and habit, and incorporation of added ions were strongly influenced by temperature change, pH change, and addition of impurities into the solution. These observed data were explained as the results of impurity effects on the solvent structure, solution structure, solubility, diffusion process, nucleation process, and growth process. Habit modification of corundum by adding iron-group ions as sulfate, nitrate, chloride, hydroxide or oxide was determined. Copper ion is not solid-soluble in corundum if sulfate ion coexists; it is solid-soluble substitutionally as Cu(3+) in six coordinated sites if it is added as nitrate, oxide or hydroxide.
Effects of Impurities on the Processing of Aluminum Alloys
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Project partners are investigating the effect of impurities on aluminum alloy processing with the aim of lower product rejection rates with the resultant effect of lower melt losses.
Author: 
Author: 
Author: D. H. Taylor