Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 28, Issue 2, Pages 312-316Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2009.11.003
Keywords
Nanocrystalline materials; Tungsten; Sintering; Scaling law
Funding
- Kennametal Inc.
- US Army Research Laboratory (ARL)
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In this investigation, nanocrystalline tungsten powders prepared by either chemical method or high energy mechanical milling were sintered to study the size-dependence of the densification of tungsten powders. Results show that nanocrystalline tungsten powders produced via an ultra-high energy milling process have significantly enhanced sinterability, compared to conventional submicron- or micron-sized powders. This study for the first time shows nanocrystalline tungsten powder can be sintered via a pressureless process to near-full densification at a temperature as low as 1100 degrees C. (c) 2009 Elsevier Ltd. All rights reserved.
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