Solid state and liquid phase sintering of mechanically activated W–20wt.% Cu powder mixture

Maneshian, Mohammad H.; Simchi, A.

doi:10.1016/j.jallcom.2007.08.080

Cited by 104 publications

(36 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…W-Cu materials are of a major interest for thermal-electrical applications like electrical contacts used in low voltage (LV), medium voltage (MV) and high voltage (HV) switching devices working in vacuum, sulfur hexafluoride (SF 6 ) gas or oil [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…W-Cu materials are commonly used for arcing contacts in SF 6 gas or oil CBs for MV and HV applications [5][6][7][8][9][10][11][12][13][14]. Functional properties of W-Cu materials are influenced by their microstructure and physical, electrical, thermal and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…W-Cu composites are considered as pseudo-alloys and advanced engineering materials due to their specific physical, electrical, thermal and mechanical properties. W-Cu powder mixtures are produced by various methods, from which the common methods are mechanical mixing, mechanical alloying and high energy ball milling of elemental powders in dry or wet conditions [2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Lungu¹,

Lucaci²,

Tsakiris³

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Lungu¹,

Lucaci²,

Tsakiris³

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

“…During HIPing, PM compacts with initial density of 6065% shrunk approximately 3040 vol% as reported by Hovis et al, 6) Kang, 7) Maneshian and Simchi. 8) This is true especially for thin-walled products with complex shape such as shaped charge liner and the like. These parts tend to undergo extensive distortion during HIPing and cause stress related problems such as cracking and collapsing etc.…”

Section: )mentioning

confidence: 99%

Near-Net-Shape Tungsten–Rhenium Alloy Parts Produced by Plasma Spray Forming and Hot Isostatic Pressing

et al. 2014

View full text Add to dashboard Cite

Tungsten5.0 mass% rhenium (W5.0 mass%Re) composite feedstock was fabricated by a new cover method. Complex and thin-walled W5.0 mass%Re products (including one shaped charge liner and one throat) were produced by plasma spray forming (PSF) followed by hot isostatic pressing (HIPing). Scanning electron microscope (SEM), Archimedes method, Vickers hardness, tensile and compressive tests were employed to study microstructure, density, micro-hardness and mechanical properties of the parts.A lamellar structure consisting of vertical columnar grains, micron-sized pores and rough interlamellar contacts with gaps of sub-micron sizes between lamellae were found in PSF deposits. The relative density, micro-hardness, ultimate tensile strength (UTS) and compressive strength of PSF deposits were about 87 « 1%, 321 « 4 HV 0.025 , 57 « 2 and 390 « 2 MPa, respectively. As dwell time of HIPing prolonging (from 2, to 4 and 6 h), internal defects of PSF deposits including inter-lamellar gaps and micro-pores could be gradually mitigated or eliminated with initial lamellar structure transforming into granular one. Relative density and mechanical properties of WRe alloys were gradually increased under the combined action of high temperature and pressure. Especially for WRe deposits after 6 h HIPing, the relative density, micro-hardness, UTS, compressive strength and yield stress were increased high up to 98 « 1%, 490 « 4 HV 0.025 , 384 « 2 MPa, 1490 « 2 and 879 « 2 MPa, respectively. The mechanical properties and the ductility at room temperature of WRe alloys were both higher than those of W deposits. 'Re effect' was revalidated and double checked in WRe alloys fabricated by PSF and HIPing here.

show abstract

“…[31][32][33] This is true especially for thin-walled and large-scale parts with complex shape such as nozzle, crucible and the like. These parts tend to undergo extensive distortion during HIPing and cause stress related problems such as cracking and collapsing etc.…”

Section: Mechanisms Of Hipingmentioning

confidence: 99%

Near-Net-Shape Molybdenum Parts Produced by Plasma Spray Forming

et al. 2011

View full text Add to dashboard Cite

Complex and thin-walled refractory metallic parts including molybdenum (Mo) rocket nozzle and crucible were fabricated using plasma spray forming (PSF) followed by hot isostatic pressing (HIPing). Optical microscope (OM), scanning electron microscope (SEM), Archimedes method, Vickers hardness and tensile tests have been employed to study microstructure, density, micro-hardness and mechanical properties of the parts. A lamellar structure consisting of vertical columnar grains, micron-sized pores, partially melted particles and rough interlamellar contacts with gaps of sub-micron sizes between lamellae were found in PSF Mo deposits. Relative density, micro-hardness and ultimate tensile strength (UTS) of the deposits were about 89%, 150 HV 0:025 and 44 MPa, respectively. After low-pressure and two-step HIPing, those changed up to about 92%, 250$400 HV 0:025 (interior $ exterior layers), 93 MPa, and 97%, 325 HV 0:025 and 170 MPa, respectively. Moreover, a fourstage mechanism of HIPing for PSF parts including heating up, recrystallization, lamellae movement, plastic yielding and creep has been proposed and discussed in detail.

show abstract

Solid state and liquid phase sintering of mechanically activated W–20wt.% Cu powder mixture

Cited by 104 publications

References 27 publications

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Near-Net-Shape Tungsten–Rhenium Alloy Parts Produced by Plasma Spray Forming and Hot Isostatic Pressing

Near-Net-Shape Molybdenum Parts Produced by Plasma Spray Forming

Contact Info

Product

Resources

About

Solid state and liquid phase sintering of mechanically activated W–20wt.% Cu powder mixture

Cited by 104 publications

References 27 publications

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Near-Net-Shape Tungsten&ndash;Rhenium Alloy Parts Produced by Plasma Spray Forming and Hot Isostatic Pressing

Near-Net-Shape Molybdenum Parts Produced by Plasma Spray Forming

Contact Info

Product

Resources

About

Near-Net-Shape Tungsten–Rhenium Alloy Parts Produced by Plasma Spray Forming and Hot Isostatic Pressing