期刊
ADVANCED POWDER TECHNOLOGY
卷 30, 期 11, 页码 2779-2786出版社
ELSEVIER
DOI: 10.1016/j.apt.2019.08.025
关键词
Spark plasma sintering (SPS); Ball milling; W-Re alloys; X-Ray diffraction (XRD); Microstructure
资金
- Summer Research Fellowship-2011, IIT Madras
- Defense Metallurgical Research Laboratory (DMRL), Hyderabad (India)
- CSIR [09/084(0519) 2010-EMR-I]
In the present investigation, nanocrystalline W and W-xRe (x = 3, 5 wt.%) alloy powders were produced by mechanical milling/alloying using high energy ball milling. The nanocrystalline nature (similar to 50 nm) of these powders was validated by the Rietveld refinement of their respective X-Ray diffraction patterns. Subsequently, spark plasma sintering of the ball milled powders was carried out. It was observed that pure W was not able to densify completely (relative density of 93%) at a temperature of 1500 degrees C. However, the addition of 5 wt.% Re resulted in near complete densification (relative density of 97%) at the same sintering temperature. The enhanced densification of W-Re powders is mainly attributed to the ductilising effect of Re assisted by the nanocrystallinity of powders, and the application of pressure during sintering. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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