In situ formation of Ti alloy/TiC porous composites by rapid microwave sintering of Ti6Al4V/MWCNTs powder

Chak Yin Tang; C. T. Wong; L. N. Zhang; M. T. Choy; T. W. Chow; Kang Cheung Chan; Tai Man Yue; Q. Chen

doi:10.1016/j.jallcom.2012.12.147

In situ formation of Ti alloy/TiC porous composites by rapid microwave sintering of Ti6Al4V/MWCNTs powder

Chak Yin Tang, C. T. Wong, L. N. Zhang, M. T. Choy, T. W. Chow, Kang Cheung Chan, Tai Man Yue, Q. Chen

Research output: Journal article publication › Journal article › Academic research › peer-review

71 Citations (Scopus)

Abstract

The rapid in situ formation of a Ti alloy/TiC porous composite was achieved using the powder metallurgy approach. Ti6Al4V powders were mixed with 14.5 vol.% of multiwalled carbon nanotubes (MWCNTs) and the particle size of Ti6Al4V was reduced to ∼5 μm by ball milling. The MWCNTs acted as microwave susceptors as well as reactants for the rapid sintering of Ti alloys. The green compact of the Ti6Al4V/MWCNTs powder was sintered in a 1.4 kW, 2.45 GHz bi-directional microwave emission furnace without using any protective gas environment. The microwave sintering was completed within 2 min. The surface temperature of the sample reached 1620 °C during sintering, as measured by a pyrometer. Titanium carbide was formed after the sintering as confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The composite has a porosity of approximately 25%, compressive strength of 270.41 ± 24.97 MPa, compressive yield stress of 145.48 ± 27.28 MPa, compressive Young's modulus of 10.87 ± 2.46 GPa and compressive strain of 3.75 ± 1.11%. The Vickers hardness value in the TiC region (545.4 ± 13.9 HV) is significant higher than that in the Ti alloy region (435.9 ± 12.9 HV). An overall Rockwell hardness of 47 HRA was measured.

Original language	English
Pages (from-to)	67-72
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	557
DOIs	https://doi.org/10.1016/j.jallcom.2012.12.147
Publication status	Published - 25 Apr 2013

Keywords

Carbon nanotubes
Mechanical properties
Microstructure
Microwave sintering
Titanium alloy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

More information

10.1016/j.jallcom.2012.12.147

Cite this

@article{9e3e25aa7b2e4e74ae3a506da009f253,

title = "In situ formation of Ti alloy/TiC porous composites by rapid microwave sintering of Ti6Al4V/MWCNTs powder",

abstract = "The rapid in situ formation of a Ti alloy/TiC porous composite was achieved using the powder metallurgy approach. Ti6Al4V powders were mixed with 14.5 vol.% of multiwalled carbon nanotubes (MWCNTs) and the particle size of Ti6Al4V was reduced to ∼5 μm by ball milling. The MWCNTs acted as microwave susceptors as well as reactants for the rapid sintering of Ti alloys. The green compact of the Ti6Al4V/MWCNTs powder was sintered in a 1.4 kW, 2.45 GHz bi-directional microwave emission furnace without using any protective gas environment. The microwave sintering was completed within 2 min. The surface temperature of the sample reached 1620 °C during sintering, as measured by a pyrometer. Titanium carbide was formed after the sintering as confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The composite has a porosity of approximately 25%, compressive strength of 270.41 ± 24.97 MPa, compressive yield stress of 145.48 ± 27.28 MPa, compressive Young's modulus of 10.87 ± 2.46 GPa and compressive strain of 3.75 ± 1.11%. The Vickers hardness value in the TiC region (545.4 ± 13.9 HV) is significant higher than that in the Ti alloy region (435.9 ± 12.9 HV). An overall Rockwell hardness of 47 HRA was measured.",

keywords = "Carbon nanotubes, Mechanical properties, Microstructure, Microwave sintering, Titanium alloy",

author = "Tang, {Chak Yin} and Wong, {C. T.} and Zhang, {L. N.} and Choy, {M. T.} and Chow, {T. W.} and Chan, {Kang Cheung} and Yue, {Tai Man} and Q. Chen",

year = "2013",

month = apr,

day = "25",

doi = "10.1016/j.jallcom.2012.12.147",

language = "English",

volume = "557",

pages = "67--72",

journal = "Journal of the Less-Common Metals",

issn = "0925-8388",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - In situ formation of Ti alloy/TiC porous composites by rapid microwave sintering of Ti6Al4V/MWCNTs powder

AU - Tang, Chak Yin

AU - Wong, C. T.

AU - Zhang, L. N.

AU - Choy, M. T.

AU - Chow, T. W.

AU - Chan, Kang Cheung

AU - Yue, Tai Man

AU - Chen, Q.

PY - 2013/4/25

Y1 - 2013/4/25

N2 - The rapid in situ formation of a Ti alloy/TiC porous composite was achieved using the powder metallurgy approach. Ti6Al4V powders were mixed with 14.5 vol.% of multiwalled carbon nanotubes (MWCNTs) and the particle size of Ti6Al4V was reduced to ∼5 μm by ball milling. The MWCNTs acted as microwave susceptors as well as reactants for the rapid sintering of Ti alloys. The green compact of the Ti6Al4V/MWCNTs powder was sintered in a 1.4 kW, 2.45 GHz bi-directional microwave emission furnace without using any protective gas environment. The microwave sintering was completed within 2 min. The surface temperature of the sample reached 1620 °C during sintering, as measured by a pyrometer. Titanium carbide was formed after the sintering as confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The composite has a porosity of approximately 25%, compressive strength of 270.41 ± 24.97 MPa, compressive yield stress of 145.48 ± 27.28 MPa, compressive Young's modulus of 10.87 ± 2.46 GPa and compressive strain of 3.75 ± 1.11%. The Vickers hardness value in the TiC region (545.4 ± 13.9 HV) is significant higher than that in the Ti alloy region (435.9 ± 12.9 HV). An overall Rockwell hardness of 47 HRA was measured.

AB - The rapid in situ formation of a Ti alloy/TiC porous composite was achieved using the powder metallurgy approach. Ti6Al4V powders were mixed with 14.5 vol.% of multiwalled carbon nanotubes (MWCNTs) and the particle size of Ti6Al4V was reduced to ∼5 μm by ball milling. The MWCNTs acted as microwave susceptors as well as reactants for the rapid sintering of Ti alloys. The green compact of the Ti6Al4V/MWCNTs powder was sintered in a 1.4 kW, 2.45 GHz bi-directional microwave emission furnace without using any protective gas environment. The microwave sintering was completed within 2 min. The surface temperature of the sample reached 1620 °C during sintering, as measured by a pyrometer. Titanium carbide was formed after the sintering as confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The composite has a porosity of approximately 25%, compressive strength of 270.41 ± 24.97 MPa, compressive yield stress of 145.48 ± 27.28 MPa, compressive Young's modulus of 10.87 ± 2.46 GPa and compressive strain of 3.75 ± 1.11%. The Vickers hardness value in the TiC region (545.4 ± 13.9 HV) is significant higher than that in the Ti alloy region (435.9 ± 12.9 HV). An overall Rockwell hardness of 47 HRA was measured.

KW - Carbon nanotubes

KW - Mechanical properties

KW - Microstructure

KW - Microwave sintering

KW - Titanium alloy

UR - http://www.scopus.com/inward/record.url?scp=84873035321&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2012.12.147

DO - 10.1016/j.jallcom.2012.12.147

M3 - Journal article

SN - 0925-8388

VL - 557

SP - 67

EP - 72

JO - Journal of the Less-Common Metals

JF - Journal of the Less-Common Metals

ER -

In situ formation of Ti alloy/TiC porous composites by rapid microwave sintering of Ti6Al4V/MWCNTs powder

Abstract

Keywords

ASJC Scopus subject areas

More information

Other files and links

Fingerprint

Cite this