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:	Norhayati Ahmad, Hidekazu Sueyoshi
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2012
Online Access:	http://journalarticle.ukm.my/5422/ http://journalarticle.ukm.my/5422/ http://journalarticle.ukm.my/5422/1/10%2520norhayati.pdf

id	ukm-5422
recordtype	eprints
spelling	ukm-54222016-12-14T06:38:24Z http://journalarticle.ukm.my/5422/ Densification and mechanical properties of electroconductive Si3N4 -based composites prepared by spark plasma sintering Norhayati Ahmad, Hidekazu Sueyoshi, 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). Universiti Kebangsaan Malaysia 2012-08 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/5422/1/10%2520norhayati.pdf Norhayati Ahmad, and Hidekazu Sueyoshi, (2012) Densification and mechanical properties of electroconductive Si3N4 -based composites prepared by spark plasma sintering. Sains Malaysiana, 41 (8). pp. 1005-1009. ISSN 0126-6039 http://www.ukm.my/jsm/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
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	Norhayati Ahmad, Hidekazu Sueyoshi,
spellingShingle	Norhayati Ahmad, Hidekazu Sueyoshi, Densification and mechanical properties of electroconductive Si3N4 -based composites prepared by spark plasma sintering
author_facet	Norhayati Ahmad, Hidekazu Sueyoshi,
author_sort	Norhayati Ahmad,
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
publisher	Universiti Kebangsaan Malaysia
publishDate	2012
url	http://journalarticle.ukm.my/5422/ http://journalarticle.ukm.my/5422/ http://journalarticle.ukm.my/5422/1/10%2520norhayati.pdf
first_indexed	2023-09-18T19:44:07Z
last_indexed	2023-09-18T19:44:07Z
_version_	1777405785058312192

Densification and mechanical properties of electroconductive Si3N4 -based composites prepared by spark plasma sintering

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