4 edition of Electroplating of sintered iron compacts found in the catalog.
Thesis(M.Sc.) - Loughborough University of Technology 1978.
|The Physical Object|
|Pagination||xvi, 57 p. :|
|Number of Pages||51|
nodata File Size: 7MB.
A practical maximum pressure of 90-112 ksi 621-772 MPa for iron-copper premixes without graphite yields a strength range of 40-50 ksi 276-344 MPa and a density of 6. ' The modulus of rupture of compacts prepared from both plated and blended materials was strongly dependent on porosity while the degree of homogeneity had a significant effect at the higher nickel contents only.
The hardness of the deposits can be varied over a considerable range by variation in the pH of the solution. Furthermore the density decreased as the sintering temperature was raised. Sabacky and Evans found that their experimental results on bed resistivities did not 61 agree with results Electroplating of sintered iron compacts by the models of earlier workers this misfit was attributed to the omission of electronic phase.
In the case of coated powder, the circumferential diffusion of iron through the nickel layer of constant thickness is the rate controlling step, and the shrinkage is independent of nickel content.
High ionic concentration of the bath increases its conductivity, thus lowering power consumption. 5 Sieve Analysis of Powders 4. x The purpose of the present investigation is to:- i Develop an electroplating technique which will enable a coating of nickel to be deposited on iron powders using a three-phase fluidised bed. Anode corrosion is very good without the addition of chloride ions, the presence of which tends to cause pitting of deposits and increases the internal stress. The production process is based on a sulfate electrolyte with soluble anodes.
These premixes can be fabricated to produce a wide variety of density and strength levels by conventional pressing and sintering. Chloride baths are, however, more corrosive than sulfate baths. However the additions of fresh solution increased the plating rate. 49 32 conductivity of fluidised bed electrodes, were of the opinion that it was the effective electrical conductivity of the particulate phase which was of major importance.
The resistivity of the fluoborbate baths, at equal metal concentration, is approximately half that of the Watts bath and equal to that of the chloride bath.
3 max As sintered 7.
He found that the best mechanical properties were achieved using electrolytic iron powders.