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- W2373295514 abstract "Sintering skin (surface) observation and analysis method was used to study the behavior of rare earth in WC-Co cemented carbide powder. The addition forms of rare earth were mischmetal (mainly containing lanthanum and cerium) and cobalt pre-alloyed powder and La(NO3)3 dissolved in acetone which were added during the wet-milling of cemented carbide. The results by SEM and EDAX show that when rare earth is added in the form of mis-chmetal-cobalt pre-alloyed powder( for short, RE-Co powder), during the sintering, lanthanum and cerium as well as the impurity elements in the starting materials of cemented carbide get enriched on the sintering skin of cemented carbide spherical powder ( for short, alloyed powder) with an average diameter of less than 200 μm, forming a third phase containing La, Ce, S, Ca, W, C and O. Cobalt is not detected in the compound. However, when rare earth is added in the form of La(NO3 )3, lanthanum is not detected on the sintering skin, indicating neither enrichment nor gathering of lanthanum on the sintering skin. The addition form of rare earth also affects the amount of the binder phase on the sintering skin. When rare earth is added in the form of RE-Co powder, the amount of the binder phase is smaller than the one when rare earth is added in the form of La(NO3)3. Therefore, the addition form of rare earth determines the behavior of rare earth in cemented carbide. When rare earth is added in the form of RE-Co powder, it can not only enrich the impurity elements in cemented carbide, but also inhibit the formation of the binder phase enrichment structure on the sintering skin of the alloyed powder." @default.
- W2373295514 created "2016-06-24" @default.
- W2373295514 creator A5063496433 @default.
- W2373295514 date "2004-01-01" @default.
- W2373295514 modified "2023-09-25" @default.
- W2373295514 title "Enrichment of rare earth on sintering skin of cemented carbide spherical powder" @default.
- W2373295514 hasPublicationYear "2004" @default.
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