USE OF REACTIVE ATMOSPHERES FOR THE TREATMENT OF B. C. C. METALS.
Abstract
The sintering of tungsten compacts impregnated with solutions of palladium chloride or nickel chloride was studied. The results of bend tests indicated no ductility in the activation-sintered tungsten specimens. Postsintering treatments for improving the ductility of palladium- and nickel-activation sintered specimens were found to be effective. The sintering kinetics of tungsten activated by nickel and palladium are being studied. The optimum concentration of the activator was found to be 0.130 wt.% of nickel and 0.317 wt.% of palladium. Additions of thoria, to stabilise the tungsten grain, have no effect on this. Rate exponents and activation energies for the sintering process were determined, and a model for theoretical purposes was devised. Test-pieces were prepared under standardised conditions (with optimum concentrations of activators) for studies of the de-embrittling treatments. (Extracted)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1965
- Accession Number
- AD0616273
Entities
People
- I. J. Toth
Organizations
- University of Surrey