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Research on Sintering Behavior of Nanograined W-25Cu Composite Powder

Zhiyong Cai

Abstract

Sintering densification and grain growth behavior of nanograined W-25Cu composite powder produced by mechanical alloying are studied, the effect of a new grain growth inhibitor on W grain growth as well as its affecting mechanism is investigated. The results show that densification and grain growth during sintering are strongly reliable on sintering temperature and time. The relative density of 97.7% and the average grain size of 310nm or so can be achieved after sintering at 1 200℃ for 30min. The new grain growth inhibitor in this experiment is proved to be effective.

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Key concepts: Sintering, Materials science, Grain growth, Composite number, Grain size, Metallurgy, Relative density, Composite material