Properties and Application of Alloys Prepared by Mechanical Alloying and Spark Plasma Sintering
A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".
Deadline for manuscript submissions: closed (15 July 2020) | Viewed by 4460
Special Issue Editor
Interests: powder metallurgy; high entropy alloys; intermetallics; structural properties; tribology
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
In many cases, the properties of alloys prepared by conventional techniques seem to be lacking in their expected purposes. Therefore, more advanced techniques leading to significant microstructural refinement improving the mechanical properties are of high interest. Since the mechanical properties are closely connected with the microstructure, mostly techniques like rapid solidification or techniques employing intensive plastic deformation are suitable for this purpose. However, the rapid solidification is only capable of refining the microstructure due to a high volume fraction of stable nucleation cores.
Although microstructure refinement is beneficial for many reasons, only mechanical alloying is capable of further increasing the mechanical properties far beyond the values commonly obtained by rapid solidification. Among the formation of solid solutions a tremendous increase in the lattice defects actively also contributes to the overall strengthening. Besides, the process itself might result in a formation of finely dispersed oxidic particles, further strengthening the material at laboratory and elevated temperatures.
However, these positive characteristics are partially offset by undesirable contamination of the alloy with the material from milling elements and the jar itself. Due to this, an optimal mix between process conditions, e.g. duration, speed, ball-to-powder weight ratio, and the consequential compaction via SPS shall be established to produce materials with superior properties.
This Special Issue focuses on the materials prepared by a combination of mechanical alloying and spark plasma sintering that retains the beneficial character of the microstructure.
We kindly invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.
Dr. Filip Průša
Guest Editor
Manuscript Submission Information
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Keywords
- Mechanical alloying
- Spark plasma sintering
- Microstructure
- Phase composition
- Mechanical properties
