Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites

Dongju Lee; Heesub Park; Hojin Ryu; Seokwoo Jeon; Soonhyung Hong

doi:10.1016/j.jallcom.2011.06.005

Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites

Dongju Lee
, Heesub Park
, Hojin Ryu
, Seokwoo Jeon
, Soonhyung Hong^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

30 Citations (Scopus)

Abstract

The effect of an addition of SiC nanowire on the microstructure and mechanical properties of tungsten-based composites is investigated in this study. SiC-nanowire-augmented tungsten composites were prepared by a spray-drying process and an in situ spark plasma sintering process. Three distinctive reaction phases, tungsten, tungsten carbide (W₂C) and rod-type tungsten silicide (W₅Si₃) were formed during the sintering process. The flexural strength was significantly increased from 706 MPa to 924 MPa in tungsten composites augmented with SiC nanowires, as was the formation of W₂C and W₅Si₃ phases. The rod-type W₅Si₃ bears significant stress by both sharing a portion of the load and providing a bridging mechanism. Furthermore, a high ablation resistance at an elevated temperature was observed for tungsten composites augmented with SiC nanowires. © 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	9060-9064
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	37
DOIs	https://doi.org/10.1016/j.jallcom.2011.06.005
Publication status	Published - 15 Sept 2011
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Mechanical properties
Metal matrix composites
Microstructure
Powder metallurgy
Sintering

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title = "Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites",

abstract = "The effect of an addition of SiC nanowire on the microstructure and mechanical properties of tungsten-based composites is investigated in this study. SiC-nanowire-augmented tungsten composites were prepared by a spray-drying process and an in situ spark plasma sintering process. Three distinctive reaction phases, tungsten, tungsten carbide (W2C) and rod-type tungsten silicide (W5Si3) were formed during the sintering process. The flexural strength was significantly increased from 706 MPa to 924 MPa in tungsten composites augmented with SiC nanowires, as was the formation of W2C and W5Si3 phases. The rod-type W5Si3 bears significant stress by both sharing a portion of the load and providing a bridging mechanism. Furthermore, a high ablation resistance at an elevated temperature was observed for tungsten composites augmented with SiC nanowires. {\textcopyright} 2011 Elsevier B.V. All rights reserved.",

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T1 - Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites

AU - Lee, Dongju

AU - Park, Heesub

AU - Ryu, Hojin

AU - Jeon, Seokwoo

AU - Hong, Soonhyung

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2011/9/15

Y1 - 2011/9/15

N2 - The effect of an addition of SiC nanowire on the microstructure and mechanical properties of tungsten-based composites is investigated in this study. SiC-nanowire-augmented tungsten composites were prepared by a spray-drying process and an in situ spark plasma sintering process. Three distinctive reaction phases, tungsten, tungsten carbide (W2C) and rod-type tungsten silicide (W5Si3) were formed during the sintering process. The flexural strength was significantly increased from 706 MPa to 924 MPa in tungsten composites augmented with SiC nanowires, as was the formation of W2C and W5Si3 phases. The rod-type W5Si3 bears significant stress by both sharing a portion of the load and providing a bridging mechanism. Furthermore, a high ablation resistance at an elevated temperature was observed for tungsten composites augmented with SiC nanowires. © 2011 Elsevier B.V. All rights reserved.

AB - The effect of an addition of SiC nanowire on the microstructure and mechanical properties of tungsten-based composites is investigated in this study. SiC-nanowire-augmented tungsten composites were prepared by a spray-drying process and an in situ spark plasma sintering process. Three distinctive reaction phases, tungsten, tungsten carbide (W2C) and rod-type tungsten silicide (W5Si3) were formed during the sintering process. The flexural strength was significantly increased from 706 MPa to 924 MPa in tungsten composites augmented with SiC nanowires, as was the formation of W2C and W5Si3 phases. The rod-type W5Si3 bears significant stress by both sharing a portion of the load and providing a bridging mechanism. Furthermore, a high ablation resistance at an elevated temperature was observed for tungsten composites augmented with SiC nanowires. © 2011 Elsevier B.V. All rights reserved.

KW - Mechanical properties

KW - Metal matrix composites

KW - Microstructure

KW - Powder metallurgy

KW - Sintering

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DO - 10.1016/j.jallcom.2011.06.005

M3 - RGC 21 - Publication in refereed journal

SN - 0925-8388

VL - 509

SP - 9060

EP - 9064

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 37

ER -

Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites

Abstract

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