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Self-compacting high density tungsten-bronze composites

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Main Authors: Kahtan S, Muhammed, Dr., Azmi, Rahmat, Prof., Azizan, Aziz, Assoc. Prof. Dr.
Other Authors: kahtan@unimap.edu.my
Format: Article
Language:English
Published: Elsevier 2014
Subjects:
Coefficient of thermal expansion
Densification
Sintering
Tungsten–bronze composite
Online Access:http://dspace.unimap.edu.my:80/dspace/handle/123456789/33158
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spelling my.unimap-331582014-03-27T04:21:28Z Self-compacting high density tungsten-bronze composites Kahtan S, Muhammed, Dr. Azmi, Rahmat, Prof. Azizan, Aziz, Assoc. Prof. Dr. kahtan@unimap.edu.my Coefficient of thermal expansion Densification Sintering Tungsten–bronze composite Link to publisher's homepage at http://www.elsevier.com Green compacts of W–bronze were encapsulated in shells of bronze powder, placed in a ceramic mold and sintered in alumina tube furnace at 1150 °C. Throughout the sintering cooling stage the differential coefficient of thermal expansion ΔCTE of W–bronze was employed to induce an external compressive densification action. The process included simultaneous sintering, hot isostatic pressing (HIP) and infiltration act to enhance densification. By this technique, pilot sintered compacts of different W50–80 wt.%–pre-mix bronze of 97–99% theoretical density were produced. This process resulted in compacts of higher hardness, higher sintered density and better structure homogeneity as opposed to similar compacts densified by the conventional sintering process. The results showed a gain in hardness by 10–20% and in density by 5–15%. The impact of different cooling rates of 3, 4, 8 and 30 °C min−1 on sintered density, microstructure and densification mechanisms was examined and evaluated. Low cooling rates of 3 and 4 °C min−1 gave the best results. 2014-03-27T04:21:28Z 2014-03-27T04:21:28Z 2013-07 Article Journal of Materials Processing Technology, vol.213 (7), 2013, pages 1088–1094 0924-0136 http://dspace.unimap.edu.my:80/dspace/handle/123456789/33158 http://www.sciencedirect.com/science/article/pii/S0924013613000502 http://dx.doi.org/10.1016/j.jmatprotec.2013.02.006 en Elsevier
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 Coefficient of thermal expansion
Densification
Sintering
Tungsten–bronze composite
spellingShingle Coefficient of thermal expansion
Densification
Sintering
Tungsten–bronze composite
Kahtan S, Muhammed, Dr.
Azmi, Rahmat, Prof.
Azizan, Aziz, Assoc. Prof. Dr.
Self-compacting high density tungsten-bronze composites
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.
Azizan, Aziz, Assoc. Prof. Dr.
format Article
author Kahtan S, Muhammed, Dr.
Azmi, Rahmat, Prof.
Azizan, Aziz, Assoc. Prof. Dr.
author_sort Kahtan S, Muhammed, Dr.
title Self-compacting high density tungsten-bronze composites
title_short Self-compacting high density tungsten-bronze composites
title_full Self-compacting high density tungsten-bronze composites
title_fullStr Self-compacting high density tungsten-bronze composites
title_full_unstemmed Self-compacting high density tungsten-bronze composites
title_sort self-compacting high density tungsten-bronze composites
publisher Elsevier
publishDate 2014
url http://dspace.unimap.edu.my:80/dspace/handle/123456789/33158
_version_ 1643797084849045504
score 13.222552

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