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

被引：24

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

页码：2779 / 2786

页数：8

共 40 条

[1] MECHANISM OF ACTIVATED SINTERING OF TUNGSTEN POWDERS [J].

AMATO, I .

MATERIALS SCIENCE AND ENGINEERING, 1972, 10 (01) :15-&

[2] PRACTICAL APPLICATIONS OF HOT-ISOSTATIC PRESSING DIAGRAMS - 4 CASE STUDIES [J].

ARZT, E ;

ASHBY, MF ;

EASTERLING, KE .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1983, 14 (02) :211-221

[3] On Joule heating during spark plasma sintering of metal powders [J].

Chawake, Niraj ;

Pinto, Linford D. ;

Srivastav, Ajeet K. ;

Akkiraju, Karthik ;

Murty, B. S. ;

Kottada, Ravi Sankar .

SCRIPTA MATERIALIA, 2014, 93 :52-55

[4] Spark plasma sintering of pure tungsten powder: Densification kinetics and grain growth [J].

Deng, Shenghua ;

Yuan, Tiechui ;

Li, Ruidi ;

Zeng, Fanhao ;

Liu, Guanghong ;

Zhou, Xiang .

POWDER TECHNOLOGY, 2017, 310 :264-271

[5] METHOD FOR THE SIMULTANEOUS DETERMINATION OF ANISOTROPIC RESIDUAL-STRESSES AND TEXTURE BY X-RAY-DIFFRACTION [J].

FERRARI, M ;

LUTTEROTTI, L .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (11) :7246-7255

[6] Kinetics of Densification and Grain Growth of Pure Tungsten During Spark Plasma Sintering [J].

Gao, Zhipeng ;

Viola, Giuseppe ;

Milsom, Ben ;

Whitaker, Iain ;

Yan, Haixue ;

Reece, Mike J. .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2012, 43 (06) :1608-1614

[7] Fabrication and properties of mechanically alloyed and Ni activated sintered W matrix composites reinforced with Y2O3 and TiB2 particles [J].

Genc, A. ;

Coskun, S. ;

Ovecoglu, M. L. .

MATERIALS CHARACTERIZATION, 2010, 61 (07) :740-748

[8]

German R.M., 1996, Sintering Theory and Practice

[9]

German RM, 2014, SINTERING: FROM EMPIRICAL OBSERVATIONS TO SCIENTIFIC PRINCIPLES, P1, DOI 10.1016/B978-0-12-401682-8.00001-X

[10] ENHANCED LOW-TEMPERATURE SINTERING OF TUNGSTEN [J].

GERMAN, RM ;

MUNIR, ZA .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1976, 7 (12) :1873-1877

← 1 2 3 4 →