Effect of Re on microstructural evolution and densification kinetics during spark plasma sintering of nanocrystalline W

被引：22
|
作者：
Pramanik, Sudipta [1 ]
Srivastav, Ajeet K. [2 ]
Jolly, Bobu Manuel [1 ]
Chawake, Niraj [1 ,3 ]
Murty, B. S. [1 ]
机构：
[1] Indian Inst Technol Madras, Dept Met & Mat Engn, Chennai 600036, Tamil Nadu, India
[2] Visvesvaraya Natl Inst Technol, Dept Met & Mat Engn, Nagpur 440010, Maharashtra, India
[3] Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria
来源：
ADVANCED POWDER TECHNOLOGY | 2019年 / 30卷 / 11期
关键词：
Spark plasma sintering (SPS); Ball milling; W-Re alloys; X-Ray diffraction (XRD); Microstructure; PURE TUNGSTEN; MECHANISM; GROWTH; ALLOY;
D O I：
10.1016/j.apt.2019.08.025
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
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.
引用
收藏
页码：2779 / 2786
页数：8
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