scholarly journals Physical and Technological Aspects of Processing High-Purity Refractory Metals

10.5772/59397 ◽  
2015 ◽  
Author(s):  
Vadim Glebovsky
Keyword(s):  
High Purity ◽  
Refractory Metals

Growing Single Crystals of High-Purity Refractory Metals by Electron-Beam Zone Melting

1995 ◽  
Vol 14 (2) ◽  
pp. 121-130 ◽  
Author(s):  
V.G. Glebovsky, ◽  
V.N. Semenov,
Keyword(s):  
Electron Beam ◽  
Single Crystals ◽  
High Purity ◽  
Zone Melting ◽  
Refractory Metals

High-purity refractory metals and silicides for microelectronic applications

1992 ◽  
Vol 11 (6) ◽  
pp. 331-335 ◽  
Author(s):  
R. Huenert ◽  
G. Winter ◽  
W. Kiliani ◽  
D. Greifendorf
Keyword(s):  
High Purity ◽  
Refractory Metals

scholarly journals Metallographic Preparation, Imaging and Analysis of High Purity Refractory Metals

2002 ◽  
Vol 8 (S02) ◽  
pp. 1302-1303
Author(s):  
G.M. Lucas ◽  
J. Spanos
Keyword(s):  
High Purity ◽  
Refractory Metals ◽  
Metallographic Preparation

Observations oh Nucleation and Growth of Voids in Nickel

1970 ◽  
Vol 28 ◽  
pp. 414-415
Author(s):  
J. L. Brimhall ◽  
H. E. Kissinger ◽  
B. Mastel
Keyword(s):  
High Purity ◽  
Growth Stage ◽  
Elevated Temperatures ◽  
Early Growth ◽  
Nucleation And Growth ◽  
Pure Nickel ◽  
Different Temperatures ◽  
Total Fluence ◽  
Neutron Exposure ◽  
Growth Of Voids

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

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