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The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions

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Main Authors: Kahtan S, Muhammed, Dr., Azmi, Rahmat, Prof.
Other Authors: kahtan@unimap.edu.my
Format: Article
Language:English
Published: Elsevier B.V. 2013
Subjects:
Activated sintering
Grain boundary
Interboundary layer
Tungsten-bronze composites
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/27306
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spelling my.unimap-273062013-08-02T07:53:23Z The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions Kahtan S, Muhammed, Dr. Azmi, Rahmat, Prof. kahtan@unimap.edu.my azmirahmat@unimap.edu.my Activated sintering Grain boundary Interboundary layer Tungsten-bronze composites Link to publisher's homepage at http://www.elsevier.com/ In this study, the effects of 1-3 wt.% Fe and Co additions on the sintering of W 40-80wt.%-pre-alloy bronze Sn 10 wt.%-Cu compacts were examined. The isothermal part of the sintering process was conducted at temperatures ranging from 920 °C to 1300 °C for 3 h. Relative sintered densities in the range of 70-90% were achieved. The gain in the sintered densities due to activator addition was 5-15%. The sintering activation effects started at temperatures as low as 600 °C below the bulk eutectic temperature. SEM, XRD and EDX tests proved that Fe and Co-rich crystalline interboundary layers completely wet the tungsten grain boundaries in the solid state and act as a short-circuit diffusion path for mass transportation. These outcomes seem to follow the classical activated sintering model and contrast with some other recently proposed models, whereby a detected nanometer-thick, activator-enriched disordered film at W grain boundary is considered fully responsible for the solid-state activated sintering. 2013-08-02T07:22:13Z 2013-08-02T07:22:13Z 2012-11 Article International Journal of Refractory Metals and Hard Materials, vol. 35, 2012, pages 170-177 0263-4368 http://www.sciencedirect.com/science/article/pii/S0263436812000935# http://hdl.handle.net/123456789/27306 en Elsevier B.V.
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Activated sintering
Grain boundary
Interboundary layer
Tungsten-bronze composites
spellingShingle Activated sintering
Grain boundary
Interboundary layer
Tungsten-bronze composites
Kahtan S, Muhammed, Dr.
Azmi, Rahmat, Prof.
The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions
description Link to publisher's homepage at http://www.elsevier.com/
author2 kahtan@unimap.edu.my
author_facet kahtan@unimap.edu.my
Kahtan S, Muhammed, Dr.
Azmi, Rahmat, Prof.
format Article
author Kahtan S, Muhammed, Dr.
Azmi, Rahmat, Prof.
author_sort Kahtan S, Muhammed, Dr.
title The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions
title_short The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions
title_full The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions
title_fullStr The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions
title_full_unstemmed The role of the activator rich-W interboundary layer on liquid phase sintering of W-pre-alloy bronze composites of Fe and Co additions
title_sort role of the activator rich-w interboundary layer on liquid phase sintering of w-pre-alloy bronze composites of fe and co additions
publisher Elsevier B.V.
publishDate 2013
url http://dspace.unimap.edu.my/xmlui/handle/123456789/27306
_version_ 1643795248320610304
score 13.235362

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