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 Low-temperature coreduction of tungsten trioxide and ammonium perrhenate can be employed as a means of preparing active tungsten-rhenium powders having well-developed surfaces and good sinterability. The action of an alloy formation activator manifests itself most strongly with active powders produced by the method of low-temperature coreduction of tungsten trioxide and ammonium perrhenate. Diffusional reaction between the tungsten and rhenium in such a case begins already during the reduction process. At temperatures of intense alloy formation phase interlayers of activator solid solutions form at grain boundaries in tungsten-rhenium alloys. As a result, the diffusional permeability of the boundaries to rhenium atoms grows, which activates the process of diffusional alloy formation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00798158
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