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Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering

Si3N4-TiN composites were prepared by conventional powder processing (SPS1) and in-situ reaction sintering (SPS2). Rapid densification of SPS was achieved for sample SPS1 and SPS2 within a few minutes at low temperature. Sample SPS1 sintered at 1550ºC showed rapid transformation of α to β Si3N4 whil...

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Main Authors: Ahmad, Norhayati, Sueyoshi, Hidekazu
Format: Article
Published: 2012
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/46778/
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spelling my.utm.467782017-09-19T08:47:09Z http://eprints.utm.my/id/eprint/46778/ Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering Ahmad, Norhayati Sueyoshi, Hidekazu QC Physics Si3N4-TiN composites were prepared by conventional powder processing (SPS1) and in-situ reaction sintering (SPS2). Rapid densification of SPS was achieved for sample SPS1 and SPS2 within a few minutes at low temperature. Sample SPS1 sintered at 1550ºC showed rapid transformation of α to β Si3N4 while for sample SPS2 sintered at 1350ºC, a significant degree of α to β Si3N4 transformation was achieved. Homogeneous distribution of equiaxed TiN grains in matrix Si3N4 resulting in high hardness (21.7 GPa) and bending strength (621 MPa) for sample SPS1 sintered at 1550ºC. Elongated TiN grains as the reinforcement of Si3N4 matrix composites was found to increase the toughness (8.39 MPa m1/2) of sample SPS2 sintered at 1350ºC. The composites prepared by SPS2 sintered at 1250-1350ºC had low electrical resistivity and could be machined by electrical discharge machining (EDM). 2012 Article PeerReviewed Ahmad, Norhayati and Sueyoshi, Hidekazu (2012) Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering. Sains Malaysiana, 41 (8). ISSN 0126-6039
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic QC Physics
spellingShingle QC Physics
Ahmad, Norhayati
Sueyoshi, Hidekazu
Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering
description Si3N4-TiN composites were prepared by conventional powder processing (SPS1) and in-situ reaction sintering (SPS2). Rapid densification of SPS was achieved for sample SPS1 and SPS2 within a few minutes at low temperature. Sample SPS1 sintered at 1550ºC showed rapid transformation of α to β Si3N4 while for sample SPS2 sintered at 1350ºC, a significant degree of α to β Si3N4 transformation was achieved. Homogeneous distribution of equiaxed TiN grains in matrix Si3N4 resulting in high hardness (21.7 GPa) and bending strength (621 MPa) for sample SPS1 sintered at 1550ºC. Elongated TiN grains as the reinforcement of Si3N4 matrix composites was found to increase the toughness (8.39 MPa m1/2) of sample SPS2 sintered at 1350ºC. The composites prepared by SPS2 sintered at 1250-1350ºC had low electrical resistivity and could be machined by electrical discharge machining (EDM).
format Article
author Ahmad, Norhayati
Sueyoshi, Hidekazu
author_facet Ahmad, Norhayati
Sueyoshi, Hidekazu
author_sort Ahmad, Norhayati
title Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering
title_short Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering
title_full Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering
title_fullStr Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering
title_full_unstemmed Densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering
title_sort densification and mechanical properties of electroconductive si3n4-based composites prepared by spark plasma sintering
publishDate 2012
url http://eprints.utm.my/id/eprint/46778/
_version_ 1643652137368944640
score 13.159267

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