Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Electrolytic silver-plating of iron power (1977)
    Springer
    Powder metallurgy and metal ceramics 16 (1977), S. 915-917 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. An examination is made of a process and apparatus for the electrodeposition of silver on iron powder. 2. To obtain a compact and adherent silver deposit on iron powder, it is necessary to apply to the latter a copper undercoat in an ethylenediamine electrolyte. 3. A study was made of the effect of changes in electrolyte composition on the cementation process occurring during silver-plating. The extent of cementation can be decreased by lowering the ammonium carbonate concentration to a minimum and raising the sodium pyrophosphate concentration above 80 g/liter. Additions of OP-7, potassium dichromate, and gelatin have a beneficial effect on the process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00796107
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Production of electrolytic nickel powders under conditions of a linearly increasing current (1988)
    Springer
    Powder metallurgy and metal ceramics 27 (1988), S. 523-526 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00799982
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Electrodeposition of finely divided copper of uniform structure (1988)
    Springer
    Powder metallurgy and metal ceramics 27 (1988), S. 596-601 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions In the potentiostatic deposition of finely divided copper on a rod cathode in the over-voltage range 0.3–0.5 V the best approximation to the shape of the current vs time function is provided by a straight line. At overvoltages of 0.6 and 0.7 V an exponential and a power-type function, respectively, represent more closely experimental plots. The structure of the dendrites is determined by the magnitude of the overvoltage, and remains uniform over the whole thickness of the loose deposit, as is evidenced by micrographs of transverse sections through the cathode with the deposit. The particle size distribution, apparent density, and flowability of the electrodeposited powder are determined by the overvoltage of the cathodic process, and can be regulated by varying the parameters of galvanodynamic electrolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00795541
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The effect of chlorides on electrodeposition of powdered copper precipitates (1969)
    Springer
    Powder metallurgy and metal ceramics 8 (1969), S. 10-15 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The authors show that, in the electrodeposition of copper powder below $$C_{Cl^ - } = 3 \cdot 10^{ - 4} $$ mole/liter, the action of chloride ions consists in their specific adsorption on the cathode. It is postulated that with $$C_{Cl^ - } \geqslant 4 \cdot 10^{ - 4} $$ mole/liter, in addition to an adsorption mechanism, a colloidal-adsorption mechanism may govern the action of Cl− owing to formation of CuClsol ultraparticles in the catholyte. 2. The dendritic character of the Cu powder particles and their surface areas increase with Ccl −, reaching a maximum value at 3·10−4 mole/liter Cl−. With a further increase in the chloride content of the electrolyte, the particles of the cathode deposit acquire an acicular shape. 3. The current yield of the copper powder increases owing to the depolarizing effect of the chloride ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00774010
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Influence of sulfur ions on the electrolytic preparation of loose cathode copper deposits (1969)
    Springer
    Powder metallurgy and metal ceramics 8 (1969), S. 871-874 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. It is demonstrated that, in the electrocrystallization of copper powder, the influence of CuS as well as that of Cu2S must be taken into account. 2. The mode of action of copper sulfides is based on the colloidal-adsorption effect of these compounds on the formation of loose cathode copper deposits. 3. With rise in the concentration of sulfide ions in the electrolyte, the particle size of the copper powder decreases, while the extent of dendritic development and the specific surface area of the powder pass through a maximum at CS 2− = 5 · 10−5 g-ion/liter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00778391
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Electrodeposition of nickel — Iron alloy powder (1969)
    Springer
    Powder metallurgy and metal ceramics 8 (1969), S. 341-344 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. On the basis of an investigation into the properties of various solutions, the following optimum electrolyte composition (moles/liter) was chosen: 0.2 nickel and iron (jointly) in the form of sulfates, 0.38 (NH4)2SO4, 0.07 NaF, and 0.2 KCl; pH 5. 2. It is shown that the composition of the iron-nickel alloy powder is governed by the concentration of its components in the electrolyte, but is not affected by changes in current density or electrolyte temperature. These characteristics are attributed to the fact that the limiting discharge currents of nickel and iron are similar and change in an equivalent manner under the influence of electrolysis conditions. 3. A study was made of the phase composition of the alloy as a function of nickel and iron concentrations and current density. It was established that the alloys represent a continuous series of solid solutions. 4. The influence of electrolyte composition and electrolysis parameters on the current efficiency was investigated. It was concluded that the optimum electrolysis parameters are a current density of 3000 A/m2 and a temperature of 30°C. 5. The physical properties of the alloy powders were investigated as a function of electrolysis conditions. It was found that 54% of all particles in the powder produced under the optimum conditions are 〈42μ in size, and have an apparent density of 2.85–3.0 g/cm3 and a specific surface area of 1.84×10−2 m2/g. The current efficiency under such conditions is 72–74%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00776604
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Conditions of preparation and pressing behavior of copper powder (1970)
    Springer
    Powder metallurgy and metal ceramics 9 (1970), S. 615-618 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The optimum conditions have been established for the preparation of pressing-quality copper powder of increased ductility from a sulfamate electrolyte. 2. A study was made of the effect of heat treatment on the structure and properties of copper powders. It is shown that a powder subjected to heat treatment becomes more ductile. Heat treatment is particularly effective in the case of copper powder prepared from the sulfamate electrolyte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00803803
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Development prospects in the production of electrolytic copper powder (1962)
    Springer
    Powder metallurgy and metal ceramics 1 (1962), S. 12-14 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01135023
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Fluid-bed drying of copper powder (1971)
    Springer
    Powder metallurgy and metal ceramics 10 (1971), S. 501-502 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00797390
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Electrodeposition of fine copper powders in the presence of organic additions (1983)
    Springer
    Powder metallurgy and metal ceramics 22 (1983), S. 610-613 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions It has been established that the influence exerted by organic additions on the formation of finely divided deposits and the properties of resultant powders are determined mainly by the specific action of the additions on the kinetics of metal discharge and by the diffusion of the ions being discharged in the electrode surface. Organic additions, whose use offers an effective means of influencing the electrocrystallization of loose cathodic copper deposits, enable powders to be obtained having different processing and physical properties. The introduction into an electrolyte of additions affecting the diffusion of the ions being discharged reduces the particle size, apparent density, and flowability of the powder and produces a more dendritic particle structure. Additions inhibiting the discharge of metal ions promote the formation of coarser powders of increased apparent density and flowability and simpler particle shape.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00792317
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...