期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 492, 期 1-2, 页码 576-584出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.11.185
关键词
Composite materials; Mechanical alloying; Solid-state sintering; Microstructure
资金
- Scientific and Technological Research Council of Turkey (TUBITAK) [105M065]
- State Planning Organization (DPT) [2001K120750]
The effect of mechanical alloying and the sintering regime on the microstructural and the physical properties of W-SiC composites were investigated. Powder mixtures of W-20 vol.% SiC were mechanically alloyed (MA'd) using a Spex mill for 3 h, 6 h and 24 h. MA'd powders were characterized by Laser Diffraction Particle Size Analyzer, SEM and XRD investigations. MA'd W-20 vol.% SiC powder composites were sintered under inert Ar and reducing H-2 gas conditions at 1680 degrees C and 1770 degrees C for 1 h. The microstructural and mechanical characterizations of the sintered samples were carried out by scanning electron microscope (SEM) and X-ray diffraction (XRD) and Vickers Hardness analyses. The addition of SiC remarkably increases the hardness of the composites. Hardness is also increased with decreasing grain size and increasing amount of MA. (C) 2009 Elsevier B.V. All rights reserved.
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