English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In the binary system Sm–Co the region between Sm 5 Co 19  (79.2 at.% Co) and Co is discussed. SmCo 5  is not stable at low temperatures; it is transformed in the anomalous eutectoid reaction SmCo 5  → Sm 5 Co 19  +Sm 2 Co 17 , and the experimental evidence does not support other assumptions about this process. In this reaction, the crystallization of Sm 5 Co 19  is suppressed or greatly retarded, leaving the appearance of simple precipitation of Sm 2 Co 17 . This precipitation, in any form, destroys the high coercivity that is otherwise obtained in sintered magnets. The conditions for possible spinodal decomposition are described, and it is shown why it cannot be responsible for the coercivity mechanism in binary SmCo 5 . The partial replacement of Co by Cu in SmCo 5  also leads to the precipitation of Sm 2 Co 17  but now, contrary to the behavior in binary Sm–Co, it actually enhances coercivity.

Samarium-Cobalt Phase Equilibria Revisited; Relevance to Permanent Magnets