Variation in the structure and properties of sintered alloys under the effect of nanodimensional carbon additives

The influence of nanodimensional carbon additives on the structural-phase state and properties of sintered alloys on copper, iron, and tungsten–cobalt bases is considered. It is shown that the undissolved part of the nanodimensional additive can serve as additional nucleation centers of crystals dur...

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Bibliographic Details
Published in:Russian journal of non-ferrous metals 2016-03, Vol.57 (2), p.135-140
Main Authors: Vityaz’, P. A., Zhornik, V. I., Kovaleva, S. A., Kukareko, V. A.
Format: Article
Language:English
Subjects:
Additives
Alloys
Carbon
Chemistry and Materials Science
Copper
Crystallization
Diamonds
Iron
Liquid phase sintering
Materials Science
Metallic Materials
Properties (attributes)
Solid solutions
Theory and Processes of Forming and Sintering of Powder Materials
Tungsten
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Summary:The influence of nanodimensional carbon additives on the structural-phase state and properties of sintered alloys on copper, iron, and tungsten–cobalt bases is considered. It is shown that the undissolved part of the nanodimensional additive can serve as additional nucleation centers of crystals during liquid-phase sintering and crystallization of powder compositions, which promotes structure refining. It is established that the nanodimensional diamond–graphite additive in alloys able to form solid solutions with carbon or strengthening carbide phases leads to an increase in hardness of sintered composites and an improvement in their tribotechnical properties.
ISSN:1067-8212
1934-970X
DOI:10.3103/S1067821216020115