Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques

W-bronze composites are very promising MMC material. It has high potential in military and industrial applications and it can replace lead in different fields where the density is of main consideration. In this study, since tungsten metal and bronze alloy are almost completely immiscible in bo...

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Main Author:	Mohammed, Kahtan S.
Format:	Thesis
Language:	English
Published:	2010
Subjects:	TK1-9971 Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.usm.my/42970/1/Kahtan_S._Mohammed24.pdf
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id	my-usm-ep.42970
record_format	uketd_dc
spelling	my-usm-ep.429702019-04-12T05:26:58Z Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques 2010 Mohammed, Kahtan S. TK1-9971 Electrical engineering. Electronics. Nuclear engineering W-bronze composites are very promising MMC material. It has high potential in military and industrial applications and it can replace lead in different fields where the density is of main consideration. In this study, since tungsten metal and bronze alloy are almost completely immiscible in both solid and liquid phases, different approaches and techniques were utilized to attain highly dense and homogenously structured composites. Super-solidus liquid phase sintering with 2 to 3 wt.% Fe additions improved the hardness by two folds and the sintered density by 5 % to 10%. Mechanical alloying of the W, Cu and Sn powder precursors by two-step process yielded composite particles of W impregnated in Cu-Sn matrix. The outcome after sintering was a composite of 85 to 95% of their theoretical density with excellent corrosion and wear resistance properties. By the implementation of a proposed new shell-on-core densification technique, composites of different compositions with 95-99% of their theoretical density were attained. The different W-bronze composite materials produced, were subjected to different laboratory testing and examinations to assess their microstructural, fractural, mechanical, chemical and physical properties. 2010 Thesis http://eprints.usm.my/42970/ http://eprints.usm.my/42970/1/Kahtan_S._Mohammed24.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TK1-9971 Electrical engineering Electronics Nuclear engineering
spellingShingle	TK1-9971 Electrical engineering Electronics Nuclear engineering Mohammed, Kahtan S. Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques
description	W-bronze composites are very promising MMC material. It has high potential in military and industrial applications and it can replace lead in different fields where the density is of main consideration. In this study, since tungsten metal and bronze alloy are almost completely immiscible in both solid and liquid phases, different approaches and techniques were utilized to attain highly dense and homogenously structured composites. Super-solidus liquid phase sintering with 2 to 3 wt.% Fe additions improved the hardness by two folds and the sintered density by 5 % to 10%. Mechanical alloying of the W, Cu and Sn powder precursors by two-step process yielded composite particles of W impregnated in Cu-Sn matrix. The outcome after sintering was a composite of 85 to 95% of their theoretical density with excellent corrosion and wear resistance properties. By the implementation of a proposed new shell-on-core densification technique, composites of different compositions with 95-99% of their theoretical density were attained. The different W-bronze composite materials produced, were subjected to different laboratory testing and examinations to assess their microstructural, fractural, mechanical, chemical and physical properties.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohammed, Kahtan S.
author_facet	Mohammed, Kahtan S.
author_sort	Mohammed, Kahtan S.
title	Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques
title_short	Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques
title_full	Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques
title_fullStr	Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques
title_full_unstemmed	Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques
title_sort	study of the effect of sintering parameters on characteristics of w-bronze composites prepared via different densification techniques
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral
publishDate	2010
url	http://eprints.usm.my/42970/1/Kahtan_S._Mohammed24.pdf
_version_	1747821139119308800

Study Of The Effect Of Sintering Parameters On Characteristics Of W-Bronze Composites Prepared Via Different Densification Techniques

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