Sintering of nano structural WC with cobalt matrix synthesised from soluble raw materials

Juha Lagerbom, Ulla Kanerva, Marjaana Karhu, Erja Turunen, Juho Lotta, Erkin Cura, Simo-Pekka Hannula

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Nano sized tungsten carbide WC powder was synthesised using water soluble raw materials. Ammonium metatungstate AMT and glycine were applied as tungsten and carbon sources. They were dissolved in water and spray-dried before thermal synthesis in argon atmosphere. The particle size was in average 50 nm and grain size was in average 12-13 nm. The synthesized nano size tungsten carbide powder and commercial submicron and micron tungsten carbide powders were mixed with cobalt powder with a ratio of 80:20 by weight. The powders were consolidated by spark plasma sintering under vacuum at 1180ºC. The effect of powder properties and phase structure on sintering mechanism was investigated. Mechanical and microstructure evaluation of the sintered compacts were carried out by dynamic indentation, electron microscopy and X-ray diffraction. The influence of grain growth of the carbides on mechanical properties was evaluated. The decomposition of fine carbides was also investigated.
Original languageEnglish
Title of host publicationEURO PM2015 congress proceedings
PublisherEuropean Power Metallurgy Association EPMA
ISBN (Electronic)978-1-899072-47-7
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
EventEuro PM2015 Power Metallurgy Congress and Exhibition, - Reims, France
Duration: 4 Oct 20157 Oct 2015

Conference

ConferenceEuro PM2015 Power Metallurgy Congress and Exhibition,
Abbreviated titleEuro PM2015
CountryFrance
CityReims
Period4/10/157/10/15

Fingerprint

Cobalt
Powders
Raw materials
Sintering
Carbides
Tungsten
Spark plasma sintering
Water
Argon
Phase structure
Grain growth
Indentation
Glycine
Electron microscopy
Carbon
Particle size
Vacuum
Decomposition
X ray diffraction
Mechanical properties

Keywords

  • PM
  • WC
  • wear
  • nano
  • ProperPart

Cite this

Lagerbom, J., Kanerva, U., Karhu, M., Turunen, E., Lotta, J., Cura, E., & Hannula, S-P. (2015). Sintering of nano structural WC with cobalt matrix synthesised from soluble raw materials. In EURO PM2015 congress proceedings European Power Metallurgy Association EPMA.
Lagerbom, Juha ; Kanerva, Ulla ; Karhu, Marjaana ; Turunen, Erja ; Lotta, Juho ; Cura, Erkin ; Hannula, Simo-Pekka. / Sintering of nano structural WC with cobalt matrix synthesised from soluble raw materials. EURO PM2015 congress proceedings. European Power Metallurgy Association EPMA, 2015.
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abstract = "Nano sized tungsten carbide WC powder was synthesised using water soluble raw materials. Ammonium metatungstate AMT and glycine were applied as tungsten and carbon sources. They were dissolved in water and spray-dried before thermal synthesis in argon atmosphere. The particle size was in average 50 nm and grain size was in average 12-13 nm. The synthesized nano size tungsten carbide powder and commercial submicron and micron tungsten carbide powders were mixed with cobalt powder with a ratio of 80:20 by weight. The powders were consolidated by spark plasma sintering under vacuum at 1180ºC. The effect of powder properties and phase structure on sintering mechanism was investigated. Mechanical and microstructure evaluation of the sintered compacts were carried out by dynamic indentation, electron microscopy and X-ray diffraction. The influence of grain growth of the carbides on mechanical properties was evaluated. The decomposition of fine carbides was also investigated.",
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Lagerbom, J, Kanerva, U, Karhu, M, Turunen, E, Lotta, J, Cura, E & Hannula, S-P 2015, Sintering of nano structural WC with cobalt matrix synthesised from soluble raw materials. in EURO PM2015 congress proceedings. European Power Metallurgy Association EPMA, Euro PM2015 Power Metallurgy Congress and Exhibition, , Reims, France, 4/10/15.

Sintering of nano structural WC with cobalt matrix synthesised from soluble raw materials. / Lagerbom, Juha; Kanerva, Ulla; Karhu, Marjaana; Turunen, Erja; Lotta, Juho; Cura, Erkin; Hannula, Simo-Pekka.

EURO PM2015 congress proceedings. European Power Metallurgy Association EPMA, 2015.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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T1 - Sintering of nano structural WC with cobalt matrix synthesised from soluble raw materials

AU - Lagerbom, Juha

AU - Kanerva, Ulla

AU - Karhu, Marjaana

AU - Turunen, Erja

AU - Lotta, Juho

AU - Cura, Erkin

AU - Hannula, Simo-Pekka

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N2 - Nano sized tungsten carbide WC powder was synthesised using water soluble raw materials. Ammonium metatungstate AMT and glycine were applied as tungsten and carbon sources. They were dissolved in water and spray-dried before thermal synthesis in argon atmosphere. The particle size was in average 50 nm and grain size was in average 12-13 nm. The synthesized nano size tungsten carbide powder and commercial submicron and micron tungsten carbide powders were mixed with cobalt powder with a ratio of 80:20 by weight. The powders were consolidated by spark plasma sintering under vacuum at 1180ºC. The effect of powder properties and phase structure on sintering mechanism was investigated. Mechanical and microstructure evaluation of the sintered compacts were carried out by dynamic indentation, electron microscopy and X-ray diffraction. The influence of grain growth of the carbides on mechanical properties was evaluated. The decomposition of fine carbides was also investigated.

AB - Nano sized tungsten carbide WC powder was synthesised using water soluble raw materials. Ammonium metatungstate AMT and glycine were applied as tungsten and carbon sources. They were dissolved in water and spray-dried before thermal synthesis in argon atmosphere. The particle size was in average 50 nm and grain size was in average 12-13 nm. The synthesized nano size tungsten carbide powder and commercial submicron and micron tungsten carbide powders were mixed with cobalt powder with a ratio of 80:20 by weight. The powders were consolidated by spark plasma sintering under vacuum at 1180ºC. The effect of powder properties and phase structure on sintering mechanism was investigated. Mechanical and microstructure evaluation of the sintered compacts were carried out by dynamic indentation, electron microscopy and X-ray diffraction. The influence of grain growth of the carbides on mechanical properties was evaluated. The decomposition of fine carbides was also investigated.

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KW - WC

KW - wear

KW - nano

KW - ProperPart

M3 - Conference article in proceedings

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Lagerbom J, Kanerva U, Karhu M, Turunen E, Lotta J, Cura E et al. Sintering of nano structural WC with cobalt matrix synthesised from soluble raw materials. In EURO PM2015 congress proceedings. European Power Metallurgy Association EPMA. 2015