Effects of Y2O3 additions on mechanically alloyed and sintered W-4 wt.% SiC composites

Selim Coşkun*, M. Lütfi Öveçoǧlu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

In this study, the effect of Y2O3 additions on the microstructural and the physical properties of W-SiC composites was investigated. Powder blends of W-4 wt.% SiC, W-4 wt.% SiC-1 wt.% Y 2O3 and W-4 wt.% SiC-5 wt.% Y2O3 were mechanically alloyed (MA'd) using a Spex mill for 24 h. MA'd composite powders were sintered under inert Ar and reducing H2 gas conditions at 1680 °C for 1 h. Microstructural and morphological characterizations of composite powders and sintered samples were carried out via SEM and XRD analyses. Furthermore, density measurements and hardness measurements of sintered samples were carried out. A highest Vickers microhardness value of 11.4 GPa was measured for the sintered W-4 wt.% SiC-5 wt.% Y2O 3 while W-4 wt.% SiC sample possessed the highest relative density value of 97.7%.

Original languageEnglish
Pages (from-to)651-655
Number of pages5
JournalInternational Journal of Refractory Metals and Hard Materials
Volume29
Issue number6
DOIs
Publication statusPublished - Nov 2011

Funding

The authors wish to express their thanks to the Scientific and Technological Research Council of Turkey (TUBİTAK ) for the financial support under the project number 105M065 . Laboratory equipment utilized in this study was purchased through the research grant 2001 K 750-90146 provided by the State Planning Organization (DPT ) and this is gratefully acknowledged.

FundersFunder number
DPT
TUBİTAK105M065, 2001 K 750-90146
Devlet Planlama Örgütü
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

    Keywords

    • Mechanical alloying
    • Microstructure
    • Solid-state sintering
    • W-SiC
    • YO

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